# List of submarines of World War II

This is a list of submarines of World War II, which began with the German invasion of Poland on 1 September 1939 and ended with the surrender of Japan on 2 September 1945.
Germany used submarines to devastating effect in the Battle of the Atlantic, where it attempted to cut Britain's supply routes by sinking more merchant ships than Britain could replace. While U-boats destroyed a significant number of ships, the strategy ultimately failed. Although U-boats had been updated in the interwar years, the major innovation was improved communications and encryption; allowing for mass-attack naval tactics. By the end of the war, almost 3,000 Allied ships (175 warships, 2,825 merchantmen) had been sunk by U-boats.
The Imperial Japanese Navy operated the most varied fleet of submarines of any navy, including Kaiten crewed torpedoes, midget submarines (Type A Ko-hyoteki and Kairyu classes), medium-range submarines, purpose-built supply submarines and long-range fleet submarines. They also had submarines with the highest submerged speeds (I-201-class submarines) and submarines that could carry multiple aircraft (I-400-class submarines). They were also equipped with one of the most advanced torpedoes of the conflict, the oxygen-propelled Type 95.
The submarine force was the most effective anti-ship weapon in the United States Navy arsenal. Although constituting only about 2 percent of the U.S. naval force, submarine force destroyed over 30 percent of the Imperial Japanese Navy, and over 60 percent of the Japanese merchant fleet, The Royal Navy Submarine Service was used primarily to blockade trade and military supply routes to Africa and the Near and Far East, but also obtained the only mutually submerged submarine-to-submarine combat kill of World War II. This occurred when the crew of HMS Venturer engaged the U-864, manually computed a successful firing solution against a three-dimensional moving target using techniques which became the basis of modern torpedo computer targeting systems.
Excluding special underwater craft such as midget submarines, the German Kriegsmarine lost 765 submarines to all causes during World War II in addition to 150 submarines scuttled in German-held ports in northern Europe during the first week of May 1945 by their crews to avoid surrendering them to the Allies, while Japan lost 129 submarines and Italy 91. The Royal Navy lost 73 and the U.S. Navy 52 submarines, while France lost 59. The Soviet Union′s submarine losses are not necessarily fully known, but the Soviet Navy probably lost 98 submarines.
Submarines show submerged displacement in long tons.
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* R
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* UU-1U-500U-1000U-2000Ua
* V
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* See also
* References
List of submarines of World War II :
| Name | Operator | Class | Type | Submerged displacement (long tons) | First commissioned | Fate |
| Acciaio | Regia Marina | Acciaio | coastal submarine | 864 | 30 October 1941 | Sunk 13 July 1943 |
| Achéron | French Navy | Redoutable | cruiser submarine | 1,968 | 22 February 1932 | Scuttled 27 November 1942; refloated July 1943; sunk 24 November 1943 |
| Achille | French Navy | Redoutable | cruiser submarine | 1,968 | 29 June 1933 | Scuttled 18 June 1940 |
| Actéon | French Navy | Redoutable | cruiser submarine | 1,968 | 18 December 1931 | Sunk 8 November 1942 |
| Adua | Regia Marina | Adua | coastal submarine | 843 | 14 November 1936 | Sunk 30 September 1941 |
| Agosta | French Navy | Redoutable | cruiser submarine | 1,968 | 1 February 1937 | Scuttled 18 June 1940 |
| Ajax | French Navy | Redoutable | cruiser submarine | 1,968 | 1 February 1934 | Scuttled 24 September 1940 |
| Alabastro | Regia Marina | Acciaio | coastal submarine | 864 | 9 May 1942 | Sunk 14 September 1942 |
| Alagi | Regia Marina | Adua | coastal submarine | 843 | 6 March 1937 | Sold for scrap 1 February 1948 |
| Alessandro Malaspina | Regia Marina | Marconi | submarine | 1,490 | 20 June 1940 | Missing after 7 September 1941 |
| Alpino Bagnolini | Regia Marina | Liuzzi | submarine | 1,484 | 22 December 1939 | Seized by Germany September 1943; renamed UIT-22; sunk 11 March 1944 |
| Amazone | French Navy Free French Naval Forces | Diane | submarine | 796 | 12 October 1933 | Stricken 26 April 1946 |
| Amberjack | United States Navy | Gato | fleet submarine | 2,424 | 19 June 1942 | Sunk 16 February 1943 |
| Ambra | Regia Marina | Perla | coastal submarine | 839 | 4 August 1936 | Sunk 4 September 1944 |
| Ametista | Regia Marina | Sirena | coastal submarine | 837 | 1 April 1934 | Scuttled 12 September 1943 |
| Ammiraglio Cagni | Regia Marina | Cagni | submarine | 2,136 | 1 April 1941 | Stricken 1 February 1948 |
| Ammiraglio Caracciolo | Regia Marina | Cagni | submarine | 2,136 | 1 June 1941 | Scuttled 11 December 1941 |
| Ammiraglio Millo | Regia Marina | Cagni | submarine | 2,136 | 1 May 1941 | Sunk 14 March 1942 |
| Ammiraglio Saint-Bon | Regia Marina | Cagni | submarine | 2,136 | 12 June 1941 | Sunk 5 January 1942 |
| Amphion | Royal Navy | Amphion | submarine | 1,590 | 27 March 1945 | Sold for scrap 24 June 1971 |
| Amphitrite | French Navy | Diane | submarine | 796 | 8 June 1933 | Sunk 8 November 1942 |
| Anfitrite | Regia Marina | Sirena | coastal submarine | 837 | 22 March 1934 | Sunk 6 March 1941 |
| Angler | United States Navy | Gato | fleet submarine | 2,424 | 1 October 1943 | Sold for scrap 1 February 1974 |
| Antiope | French Navy Free French Naval Forces | Diane | submarine | 796 | 12 October 1933 | Stricken 26 April 1946 |
| Antonio Sciesa | Regia Marina | Balilla | cruiser submarine | 1,874 | 12 April 1929 | Scuttled 12 November 1942 |
| Apogon | United States Navy | Balao | fleet submarine | 2,391 | 16 July 1943 | Sunk as target 25 July 1946 |
| Aradam | Regia Marina | Adua | coastal submarine | 843 | 16 January 1937 | Scuttled September 1943; refloated by Germany; sunk 4 September 1944 |
| Archerfish | United States Navy | Balao | fleet submarine | 2,391 | 4 September 1943 | Sunk as target 19 October 1968 |
| Archimède | French Navy Free French Naval Forces | Redoutable | cruiser submarine | 1,968 | 22 December 1932 | Scrapped February 1952 |
| Archimede | Regia Marina | Brin | submarine | 1,380 | 18 April 1939 | Sunk 15 April 1943 |
| Aréthuse | French Navy Free French Naval Forces | Argonaute | submarine | 785 | 14 July 1933 | Joined the Free French Naval Forces December 1942; laid up 1944; sold for scrap 25 March 1946 |
| Argento | Regia Marina | Acciaio | coastal submarine | 864 | 16 May 1942 | Scuttled 3 August 1943 |
| Argo | French Navy Free French Naval Forces | Redoutable | cruiser submarine | 1,968 | 12 February 1933 | Scrapped April 1946 |
| Argo | Regia Marina | Argo | coastal submarine | 1,000 | 31 August 1937 | Scuttled 10 September 1943; refloated by Germany; scuttled 1 May 1945 |
| Argonaut (SS-166) | United States Navy | V-4 | submarine | 4,161 | 2 April 1928 | Sunk 10 January 1943 |
| Argonaut (SS-475) | United States Navy | Tench | fleet submarine | 2,414 | 15 January 1945 | Sold to Canada as HMCS Rainbow 1968, scrapped 1977 |
| Argonauta | Regia Marina | Argonauta | coastal submarine | 1,080 | 1 January 1932 | Sunk 28 June 1940 |
| Argonaute | French Navy | Argonaute | submarine | 785 | 1 June 1932 | Sunk 8 November 1942 |
| Ariane | French Navy | Ariane | submarine | 787 | 1 September 1929 | Scuttled 9 November 1942 |
| Ascianghi | Regia Marina | Adua | coastal submarine | 843 | 25 March 1938 | Sunk 23 July 1943 |
| Aspro | United States Navy | Balao | fleet submarine | 2,391 | 31 July 1943 | Sunk as target 16 November 1962 |
| Asteria | Regia Marina | Acciaio | coastal submarine | 864 | 8 November 1941 | Scuttled 17 February 1943 |
| Astute | Royal Navy | Amphion | submarine | 1,590 | 30 June 1945 | Sold for scrap 1 October 1970 |
| Atalante | French Navy Free French Naval Forces | Argonaute | submarine | 785 | 18 September 1934 | Joined the Free French Naval Forces December 1942; laid up 1944; sold for scrap 25 March 1946 |
| Atropo | Regia Marina | Foca | minelayer submarine | 1,625 | 14 February 1939 | Stricken 23 March 1947 |
| Atule | United States Navy | Balao | fleet submarine | 2,391 | 21 June 1944 | Transferred to Peru as Pacocha 31 July 1974; sunk in collision 26 August 1988 |
| Aurore | French Navy | Aurore | coastal submarine | 1,150 | 20 June 1940 | Scuttled 27 November 1942 |
| Avorio | Regia Marina | Acciaio | coastal submarine | 864 | 25 March 1942 | Scuttled 8 February 1943 |
| Axum | Regia Marina | Adua | coastal submarine | 843 | 2 December 1936 | Wrecked and scuttled 28 December 1943 |
| Balao | United States Navy | Balao | fleet submarine | 2,391 | 4 February 1943 | Sunk as target 6 September 1963 |
| Balilla | Regia Marina | Balilla | cruiser submarine | 1,874 | 21 July 1928 | Decommissioned 28 April 1941, converted into barge, scrapped 1946 |
| Bang | United States Navy | Balao | fleet submarine | 2,391 | 4 December 1943 | Transferred to Spain as Cosme Garcia, 1 October 1972; scrapped 1983 |
| Barb | United States Navy | Gato | fleet submarine | 2,424 | 2 April 1942 | Sold to Italy as Enrico Tazzoli 13 December 1954, scrapped 1973 |
| Barbarigo | Regia Marina | Marcello | submarine | 1,313 | 19 September 1938 | Missing after 16 June 1943 |
| Barbel | United States Navy | Balao | fleet submarine | 2,391 | 3 April 1944 | Sunk 4 February 1945 |
| Barbero | United States Navy | Balao | fleet submarine | 2,391 | 29 April 1944 | Sunk as target 7 October 1964 |
| Barracuda | United States Navy | Barracuda | submarine | 2,506 | 1 October 1924 | Sold for scrap 16 November 1945 |
| Bashaw | United States Navy | Gato | fleet submarine | 2,424 | 25 October 1943 | Sold for scrap 4 August 1972 |
| Bass | United States Navy | Barracuda | submarine | 2,506 | 26 September 1925 | Scuttled 12 March 1945 |
| Batfish | United States Navy | Balao | fleet submarine | 2,391 | 21 August 1943 | Museum ship 18 February 1972 |
| Baya | United States Navy | Balao | fleet submarine | 2,391 | 20 May 1944 | Sold for scrap 12 October 1973 |
| Becuna | United States Navy | Balao | fleet submarine | 2,391 | 27 May 1944 | Museum ship 21 June 1976 |
| Beilul | Regia Marina | Adua | coastal submarine | 843 | 14 September 1938 | Captured by Germany 9 September 1943; Sunk May 1944 |
| Bergall | United States Navy | Balao | fleet submarine | 2,391 | 12 June 1944 | Transferred to Turkey as Turgutreis 18 October 1958; scrapped April 2000 |
| Berillo | Regia Marina | Perla | coastal submarine | 846 | 5 August 1936 | Scuttled 2 October 1940 |
| Besugo | United States Navy | Balao | fleet submarine | 2,391 | 19 June 1944 | Transferred to Italy as Francesco Morosini 31 May 1966; sold for scrap, 20 June 1977 |
| Bévéziers | French Navy | Redoutable | cruiser submarine | 1,968 | 4 June 1937 | Sunk 5 May 1942 |
| Billfish | United States Navy | Balao | fleet submarine | 2,391 | 20 April 1943 | Sold for scrap 17 March 1971 |
| Blackfin | United States Navy | Balao | fleet submarine | 2,391 | 4 July 1944 | Sunk as target 13 May 1973 |
| Blackfish | United States Navy | Gato | fleet submarine | 2,424 | 22 July 1942 | Sold for scrap on 4 May 1959 |
| Blenny | United States Navy | Balao | fleet submarine | 2,391 | 27 June 1944 | Scuttled 7 June 1989 |
| Blower | United States Navy | Balao | fleet submarine | 2,391 | 10 August 1944 | Transferred to Turkey as Dumlupınar 16 November 1950; sunk in collision 4 April 1953 |
| Blueback | United States Navy | Balao | fleet submarine | 2,391 | 28 August 1944 | Transferred to Turkey as İnönü 23 May 1948; returned to United States for scrapping 30 November 1973 |
| Bluefish | United States Navy | Gato | fleet submarine | 2,424 | 24 May 1943 | Sold for scrap 8 June 1960 |
| Bluegill | United States Navy | Gato | fleet submarine | 2,424 | 11 November 1943 | Scuttled 3 December 1970 |
| Boarfish | United States Navy | Balao | fleet submarine | 2,391 | 23 September 1944 | Transferred to Turkey as Sakarya 23 May 1948; returned to United States for scrapping 1 January 1974 |
| Bonefish | United States Navy | Gato | fleet submarine | 2,424 | 31 May 1943 | Sunk 18 June 1945 |
| Bonita | United States Navy | Barracuda | submarine | 2,506 | 22 May 1926 | Sold for scrap 4 October 1945 |
| Bowfin | United States Navy | Balao | fleet submarine | 2,391 | 1 May 1943 | Museum ship 1 August 1979 |
| Bream | United States Navy | Gato | fleet submarine | 2,424 | 24 January 1944 | Sunk as target 7 November 1969 |
| Brill | United States Navy | Balao | fleet submarine | 2,391 | 26 October 1944 | Transferred to Turkey as Birinci İnönü 25 May 1948; decommissioned 29 November 1972 |
| Brin | Regia Marina | Brin | submarine | 1,380 | 18 April 1939 | Stricken 1 February 1948 |
| Bronzo | Regia Marina | Acciaio | coastal submarine | 864 | 2 January 1942 | Captured by Royal Navy 12 July 1943; commissioned as HMS P714; transferred to France as Narval 29 January 1944; scrapped 1948 |
| Bugara | United States Navy | Balao | fleet submarine | 2,391 | 15 November 1944 | Sank under tow 1 June 1971 |
| Bullhead | United States Navy | Balao | fleet submarine | 2,391 | 4 December 1944 | Sunk 6 August 1945 |
| Bumper | United States Navy | Balao | fleet submarine | 2,391 | 9 December 1944 | Transferred to Turkey as Çanakkale 16 November 1950; decommissioned 11 August 1976 |
| Burrfish | United States Navy | Balao | fleet submarine | 2,391 | 13 September 1943 | Transferred to Canada as Grilse 11 May 1961; sunk as target 19 November 1969 |
| CA 1 | Regia Marina | CA (Series I) | midget submarine | 16.1 | 15 April 1938 | Scuttled 9 September 1943 |
| CA 2 | Regia Marina | CA (Series I) | midget submarine | 16.1 | late April 1938 | Captured by Germany 9 September 1943; Scuttled August 1944 |
| CA 3 | Regia Marina | CA (Series II) | midget submarine | | January 1943 | Scuttled 9 September 1943 |
| CA 4 | Regia Marina | CA (Series II) | midget submarine | | January 1943 | Scuttled 9 September 1943 |
| Cabezon | United States Navy | Balao | fleet submarine | 2,391 | 30 December 1944 | Sold for scrap 28 December 1971 |
| Cabrilla | United States Navy | Balao | fleet submarine | 2,391 | 24 May 1943 | Museum ship 19 October 1968; sold for scrap 18 April 1972 |
| Cachalot | United States Navy | Cachalot | submarine | 1,650 | 1 December 1933 | Sold for scrap 26 January 1947 |
| Cachalot | Royal Navy | Grampus | minelayer submarine | 2,157 | 15 August 1938 | Sunk 30 July 1941 |
| Caïman | French Navy | Requin | submarine | 1,132 | 7 February 1928 | Scuttled 27 November 1942; refloated February 1943; sunk 11 March 1944 |
| Caiman | United States Navy | Balao | fleet submarine | 2,391 | 17 July 1944 | Transferred to Turkey as Dumlupınar 30 June 1972; retired 15 September 1986 |
| Calypso | French Navy | Circé | submarine | 764 | 29 January 1927 | Disarmed December 1940; captured by Italy 8 December 1942; renamed FR117; scuttled 6 May 1943; refloated; stricken 18 August 1947 |
| Capelin | United States Navy | Balao | fleet submarine | 2,391 | 4 June 1943 | Missing after 2 December 1943 |
| Capitaine | United States Navy | Balao | fleet submarine | 2,391 | 26 January 1945 | Transferred to Italy 5 March 1966; retired 5 December 1977 |
| Carbonero | United States Navy | Balao | fleet submarine | 2,391 | 7 February 1945 | Sunk as target 27 April 1975 |
| Carp | United States Navy | Balao | fleet submarine | 2,391 | 28 February 1945 | Sold for scrap 26 July 1973 |
| Casabianca | French Navy | Redoutable | cruiser submarine | 1,968 | 1 January 1937 | Scrapped February 1952 |
| Catfish | United States Navy | Balao | fleet submarine | 2,391 | 19 March 1945 | Transferred to Argentina as Santa Fe 1 July 1971; scuttled 20 February 1985 |
| Cavalla | United States Navy | Gato | fleet submarine | 2,424 | 29 February 1944 | Museum ship 21 January 1971 |
| CB-1 | Regia Marina | CB | midget submarine | 44.3 | 27 January 1941 | Transferred to Romania September 1943; Scuttled 25 August 1944; refloated by Soviet Union; commissioned in Soviet Navy as TM-4; scrapped 1945 |
| CB-2 | Regia Marina | CB | midget submarine | 44.3 | 27 January 1941 | Transferred to Romania September 1943; Scuttled August 1944; refloated by Soviet Union; commissioned in Soviet Navy as TM-5; scrapped 1945 |
| CB-3 | Regia Marina | CB | midget submarine | 44.3 | 10 May 1941 | Transferred to Romania September 1943; Scuttled 25 August 1944; refloated by Soviet Union; commissioned in Soviet Navy as TM-6; scrapped 1945 |
| CB-4 | Regia Marina | CB | midget submarine | 44.3 | 10 May 1941 | Transferred to Romania September 1943; Scuttled August 1944; refloated by Soviet Union; commissioned in Soviet Navy as TM-7; scrapped 1945 |
| CB-5 | Regia Marina | CB | midget submarine | 44.3 | 10 May 1941 | Sunk 13 June 1942 |
| CB-6 | Regia Marina | CB | midget submarine | 44.3 | 10 May 1941 | Transferred to Romania September 1943; Scuttled August 1944 |
| CB-7 | Regia Marina | CB | midget submarine | 44.3 | 1 August 1943 | Captured by Germany 9 September 1943; cannibalized for spare parts |
| CB-8 | Regia Marina | CB | midget submarine | 44.3 | 1 August 1943 | Scrapped 1948 |
| CB-9 | Regia Marina | CB | midget submarine | 44.3 | 1 August 1943 | Scrapped 1948 |
| CB-10 | Regia Marina | CB | midget submarine | 44.3 | 1 August 1943 | Scrapped 1948 |
| CB-11 | Regia Marina | CB | midget submarine | 44.3 | 24 August 1943 | Scrapped 1948 |
| CB-12 | Regia Marina | CB | midget submarine | 44.3 | 24 August 1943 | Scrapped 1948 |
| CB-13 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk 23 March 1945 |
| CB-14 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk, possibly on 23 March 1945 |
| CB-15 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Destroyed in port 20 April 1944 |
| CB-16 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Beached after crew mutinied 2 October 1944; surrendered to United Kingdom |
| CB-17 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk 3 April 1945 |
| CB-18 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk 31 March 1945 |
| CB-19 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Captured by the Yugoslav Partisans May 1945; scrapped 1947 |
| CB-20 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Captured by the Yugoslav Partisans May 1945; in service in Yugoslav Navy as Mališan during 1950s; museum ship 1959 |
| CB-21 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk in collision 29 April 1945 |
| CB-22 | National Republican Navy | CB | midget submarine | 44.3 | late 1943 | Sunk 11 March 1945 |
| Cérès | French Navy | Minerve | submarine | 856 | 15 July 1939 | Scuttled 9 November 1942, salvaged 1943, stricken 18 February 1946 |
| Cero | United States Navy | Gato | fleet submarine | 2,424 | 4 July 1943 | Sold for scrap October 1970 |
| Charr | United States Navy | Balao | fleet submarine | 2,391 | 23 September 1944 | Sold for scrap 17 August 1972 |
| Chivo | United States Navy | Balao | fleet submarine | 2,391 | 28 April 1945 | Transferred to Argentina as Santiago del Estero 1 July 1971; sold for scrap 1983 |
| Chopper | United States Navy | Balao | fleet submarine | 2,391 | 25 May 1945 | Sank 21 July 1976 |
| Chub | United States Navy | Balao | fleet submarine | 2,391 | 21 October 1944 | Transferred to Turkey as Gür 25 May 1948; decommissioned 12 December 1975; scrapped |
| Circé | French Navy | Circé | submarine | 764 | 12 May 1928 | Disarmed December 1940; captured by Italy 8 December 1942; sunk 31 January 1943 |
| Ciro Menotti | Regia Marina | Bandiera | submarine | 1,080 | 29 July 1930 | Stricken 1 February 1948 |
| Cisco | United States Navy | Balao | fleet submarine | 2,391 | 10 May 1943 | Sunk 28 September 1943 |
| Clamagore | United States Navy | Balao | fleet submarine | 2,391 | 28 June 1945 | Museum ship May 1981 |
| Clyde | Royal Navy | River | submarine | 2,723 | 12 April 1935 | Paid off 30 July 1946 |
| Cobbler | United States Navy | Balao | fleet submarine | 2,391 | 8 August 1945 | Transferred to Turkey as Çanakkale 21 November 1973; decommissioned 22 January 1998 |
| Cobia | United States Navy | Gato | fleet submarine | 2,424 | 29 March 1944 | Memorial ship 17 August 1970 |
| Cobalto | Regia Marina | Acciaio | coastal submarine | 864 | 18 March 1942 | Sunk 12 August 1942 |
| Cochino | United States Navy | Balao | fleet submarine | 2,424 | 25 August 1945 | Sank 26 August 1949 |
| Cod | United States Navy | Gato | fleet submarine | 2,424 | 21 June 1943 | Museum ship 1 May 1976 |
| Comandante Cappellini | Regia Marina | Marcello | submarine | 1,313 | 23 September 1939 | Seized by Japan and transferred to Germany as UIT-24 10 September 1943; seized by Japan 5 May 1945; commissioned as I-503 May 1945; surrendered to United States August 1945; scuttled 16 April 1946 |
| Comandante Faà di Bruno | Regia Marina | Marcello | submarine | 1,313 | 23 October 1939 | Missing after 31 October 1940 |
| Conger | United States Navy | Tench | fleet submarine | 2,414 | 14 February 1945 | Sold for scrap 9 July 1964 |
| Console Generale Liuzzi | Regia Marina | Liuzzi | submarine | 1,484 | 21 November 1939 | Sunk 27 June 1940 |
| Corallo | Regia Marina | Perla | coastal submarine | 846 | 26 September 1936 | Sunk 13 December 1942 |
| Corvina | United States Navy | Gato | fleet submarine | 2,424 | 6 August 1943 | Sunk 16 November 1943 |
| Crevalle | United States Navy | Balao | fleet submarine | 2,391 | 21 April 1944 | Sold for scrap 17 March 1971 |
| Croaker | United States Navy | Gato | fleet submarine | 2,424 | 24 June 1943 | Museum ship 27 June 1976 |
| Cutlass | United States Navy | Tench | fleet submarine | 2,414 | 17 March 1945 | Transferred to Republic of China as Hai Shih 15 April 1973 |
| Curie | Royal Navy Free French Naval Forces | U | submarine | 740 | 2 May 1943 | Formerly HMS Vox; loaned to Free French Naval Forces 2 May 1943; returned to United Kingdom July 1946; scrapped May 1949 |
| Cuttlefish | United States Navy | Cachalot | submarine | 1,650 | 8 June 1934 | Sold for scrap 12 February 1947 |
| Dace | United States Navy | Gato | fleet submarine | 2,424 | 23 July 1943 | Transferred to Italy as Leonardo da Vinci 31 January 1955; sold for scrap 1 April 1975 |
| Dagabur | Regia Marina | Adua | coastal submarine | 843 | 9 April 1937 | Sunk 12 August 1942 |
| Danaé | French Navy | Ariane | submarine | 787 | | Scuttled 9 November 1942 |
| Dandolo | Regia Marina | Marcello | submarine | 1,313 | 25 March 1938 | Stricken 1 February 1948 |
| Darter | United States Navy | Gato | fleet submarine | 2,424 | 7 September 1943 | Wrecked 24 October 1944 |
| Dauphin | French Navy | Requin | submarine | 1,132 | 22 November 1927 | Captured by Italy 8 December 1942; renamed FR 115; captured by Germany 9 September 1943; scuttled 15 September 1943 |
| Dekabrist | Soviet Navy | Dekabrist | submarine | 1,354 | 3 November 1928 | Lost in training accident 13 November 1940 |
| Delfin | Royal Hellenic Navy | V | submarine | 740 | 16 October 1944 | Formerly HMS Vengeful; loaned to Greece April 1945; returned to United Kingdom 1957; scrapped March 1958 |
| Delfino | Regia Marina | Squalo | submarine | 1,107 | 19 June 1931 | Sunk in collision 23 March 1943 |
| Delfinul | Royal Romanian Navy | | submarine | 900 | 1936 | Captured by Soviet Union August 1944; returned 1951; scrapped 1957 |
| Dentuda | United States Navy | Balao | fleet submarine | 2,391 | 30 December 1944 | Sold for scrap 12 February 1969 |
| Des Geneys | Regia Marina | Pisani | submarine | 1,040 | 31 October 1929 | Decommissioned 16 April 1942; scrapped |
| Dessiè | Regia Marina | Adua | coastal submarine | 843 | 14 April 1937 | Sunk 28 November 1942 |
| Devilfish | United States Navy | Balao | fleet submarine | 2,391 | 1 September 1944 | Sunk as a target 14 August 1968 |
| Diablo | United States Navy | Tench | fleet submarine | 2,414 | 31 March 1945 | Transferred to Pakistan as Ghazi 1 June 1964; lost 4–5 December 1971 |
| Diamant | French Navy | Saphir | minelayer submarine | 925 | 21 June 1934 | Scuttled 27 November 1942; refloated 29 March 1943; sunk 22 June 1944 |
| Diamante | Regia Marina | Sirena | coastal submarine | 837 | 18 November 1933 | Sunk 20 June 1940 |
| Diane | French Navy | Diane | submarine | 796 | 1 September 1932 | Scuttled 9 November 1942 |
| Diaspro | Regia Marina | Perla | coastal submarine | 846 | 22 August 1936 | Stricken 1 February 1948 |
| Dolfijn | Royal Netherlands Navy | U | submarine | 730 | 8 October 1942 | Scrapped 1952 |
| Dolphin | United States Navy | V-7 | submarine | 2,240 | 1 June 1932 | Sold for scrap 26 August 1946 |
| Domenico Millelire | Regia Marina | Balilla | cruiser submarine | 1,874 | 11 August 1928 | Decommissioned 1 April 1943, purchased by Pirelli and transformed into latex storage 1948, scrapped 1977 |
| Dorado | United States Navy | Gato | fleet submarine | 2,424 | 28 August 1943 | Sunk 12 October 1943 |
| Doris (Q135) | French Navy | Circé | submarine | 764 | 26 May 1928 | Sunk 8 May 1940 |
| Doris (P84) | Free French Naval Forces | V | submarine | 740 | 1 August 1944 | Formerly HMS Vineyard; returned to the United Kingdom 18 November 1947; scrapped June 1950 |
| Dragonet | United States Navy | Balao | fleet submarine | 2,391 | 6 March 1944 | Scuttled 17 September 1961 |
| Drum | United States Navy | Gato | fleet submarine | 2,424 | 1 November 1941 | Museum ship 14 April 1969 |
| Durbo | Regia Marina | Adua | coastal submarine | 843 | 1 July 1938 | Scuttled 18 October 1940 |
| Dzik | Polish Navy | U | submarine | 730 | 16 December 1942 | Transferred to Denmark as U 1 July 1947; scrapped 1958 |
| Emo | Regia Marina | Marcello | submarine | 1,313 | 25 October 1938 | Scuttled 10 November 1942 |
| Enrico Tazzoli | Regia Marina | Calvi | cruiser submarine | 2,028 | 18 May 1936 | Missing after 17 May 1943 |
| Enrico Toti | Regia Marina | Balilla | cruiser submarine | 1,874 | 19 September 1928 | Decommissioned 1 April 1943, converted into blockship, scrapped 1946 |
| Entemedor | United States Navy | Balao | fleet submarine | 2,391 | 6 April 1945 | Transferred to Turkey as Preveze on 31 July 1972; discarded 1987 |
| Escolar | United States Navy | Balao | fleet submarine | 2,391 | 2 June 1944 | Missing after 17 October 1944 |
| Espadon | French Navy | Requin | submarine | 1,132 | 16 December 1927 | Captured by Italy 8 December 1942; renamed FR 114; scuttled 15 September 1943; refloated; not repaired |
| Ettore Fieramosca | Regia Marina | Balilla | cruiser submarine | 2,094 | 1930 | Decommissioned April 1941 |
| Eurydice | French Navy | Ariane | submarine | 787 | 1 September 1929 | Scuttled 27 November 1942 |
| Filippo Corridoni | Regia Marina | Bragadin | submarine | 981 | 17 November 1931 | Stricken 1 February 1948 |
| Finback | United States Navy | Gato | fleet submarine | 2,424 | 31 January 1942 | Sold for scrap 15 July 1959 |
| Fisalia | Regia Marina | Argonauta | coastal submarine | 1,080 | 5 June 1932 | Sunk 28 September 1941 |
| Flasher | United States Navy | Gato | fleet submarine | 2,424 | 25 September 1943 | Sold for scrap 8 June 1963 |
| Flier | United States Navy | Gato | fleet submarine | 2,424 | 18 October 1943 | Sunk 13 August 1944 |
| Flounder | United States Navy | Gato | fleet submarine | 2,424 | 29 November 1943 | Scrapped February 1960 |
| Flutto | Regia Marina | Flutto | submarine | 1,093 | 20 March 1943 | Sunk 11 July 1943 |
| Flying Fish | United States Navy | Gato | fleet submarine | 2,424 | 10 December 1941 | Sold for scrap 1 May 1959 |
| Foca | Regia Marina | Foca | minelayer submarine | 1,625 | 6 November 1937 | Sunk 13 October 1940 |
| FR 111 | Regia Marina | Requin | submarine | 1,132 | 7 May 1928 | Former French submarine Phoque; captured 8 December 1942; sunk 28 February 1943 |
| FR 112 | Regia Marina | Saphir | minelayer submarine | 925 | 30 September 1930 | Former French submarine Saphir; captured 8 December 1942; captured bv Germany and scuttled 15 September 1943 |
| FR 113 | Regia Marina | Requin | submarine | 1,132 | 28 May 1926 | Former French submarine Requin; captured 8 December 1942; captured by Germany 9 September 1943; sold for scrap 1944 |
| FR 114 | Regia Marina | Requin | submarine | 1,132 | 16 December 1927 | Former French submarine Espadon; captured 8 December 1942; scuttled 15 September 1943; refloated; not repaired |
| FR 115 | Regia Marina | Requin | submarine | 1,132 | 22 November 1927 | Former French submarine Dauphin; captured 8 December 1942; captured by Germany 9 September 1943; scuttled 15 September 1943 |
| FR 116 | Regia Marina | Saphir | minelayer submarine | 925 | 10 September 1930 | Former French submarine Turquoise; captured 8 December 1942; captured bv Germany and scuttled 8 September 1943 |
| FR 117 | Regia Marina | Circé | submarine | 764 | 29 January 1927 | Former French submarine Calypso; captured 8 December 1942; scuttled 6 May 1943; refloated; stricken 18 August 1947 |
| Fratelli Bandiera | Regia Marina | Bandiera | submarine | 1,080 | 2 June 1930 | Stricken 1 February 1948 |
| Fresia | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1945 |
| Fresnel | French Navy | Redoutable | cruiser submarine | 1,968 | 22 February 1932 | Scuttled 27 November 1942; refloated 28 January 1943; sunk 11 March 1944 |
| Gabilan | United States Navy | Gato | fleet submarine | 2,424 | 28 December 1943 | Sold for scrap 11 January 1960 |
| Galatea | Regia Marina | Sirena | coastal submarine | 837 | 25 June 1934 | Stricken 1 February 1948 |
| Galatée | French Navy | Sirène | submarine | 745 | 1927 | Scuttled 27 November 1942 |
| Galileo Galilei | Regia Marina Royal Navy | Archimede | submarine | 1,239 | 19 March 1934 | Captured by United Kingdom 18 June 1940, commissioned as HMS X2 June 1942, paid off January 1946 |
| Galileo Ferraris | Regia Marina | Archimede | submarine | 1,239 | 31 January 1935 | Sunk 25 October 1941 |
| Galvani | Regia Marina | Brin | submarine | 1,380 | 29 July 1938 | Sunk 26 June 1940 |
| Gar | United States Navy | Tambor | fleet submarine | 2,370 | 14 April 1941 | Sold for scrap 11 December 1959 |
| Gato | United States Navy | Gato | fleet submarine | 2,424 | 31 December 1941 | Sold for scrap 25 July 1960 |
| Gemma | Regia Marina | Perla | coastal submarine | 846 | 8 July 1936 | Sunk 8 October 1940 |
| General Mola | Spanish Navy | Archimede | submarine | 1,239 | 1935 | Stricken 1959 |
| General Sanjurjo | Spanish Navy | Archimede | submarine | 1,239 | 1934 | Stricken 1959 |
| Giada | Regia Marina | Acciaio | coastal submarine | 864 | 6 December 1941 | Stricken 1 January 1966 |
| Giovanni Bausan | Regia Marina | Pisani | submarine | 1,040 | 15 September 1929 | Decommissioned 16 April 1942; scrapped |
| Giovanni da Procida | Regia Marina | Mameli | submarine | 993 | 20 January 1929 | Decommissioned 16 April 1942; scrapped |
| Giuseppe Finzi | Regia Marina | Calvi | cruiser submarine | 2,028 | 8 January 1936 | Captured by Germany 9 September 1943; renamed UIT-21; scuttled 25 August 1944 |
| Glauco | Regia Marina | Glauco | submarine | 1,305 | January 1936 | Scuttled 27 June 1941 |
| Goffredo Mameli | Regia Marina | Mameli | submarine | 993 | 20 January 1929 | Stricken 1 February 1948 |
| Golet | United States Navy | Gato | fleet submarine | 2,424 | 30 November 1943 | Sunk 14 June 1944 |
| Gondar | Regia Marina | Adua | coastal submarine | 843 | 28 February 1938 | Scuttled 30 September 1940 |
| Gorgo | Regia Marina | Flutto | submarine | 1,093 | 11 November 1942 | Sunk 21 May 1943 |
| Grampus | Royal Navy | Grampus | submarine | 2,157 | 10 March 1937 | Sunk 16 June 1940 |
| Grampus | United States Navy | Tambor | fleet submarine | 2,370 | 23 May 1941 | Sunk 5 March 1943 |
| Granito | Regia Marina | Acciaio | coastal submarine | 864 | 3 January 1942 | Sunk 9 November 1942 |
| Graph | Royal Navy | Type VIIC | submarine | 857 | 15 May 1941 | Former German U-570, captured by United Kingdom 27 August 1941, wrecked September 1944 |
| Grayback | United States Navy | Tambor | fleet submarine | 2,370 | 30 June 1941 | Sunk 27 February 1944 |
| Grayling | United States Navy | Tambor | fleet submarine | 2,370 | 1 March 1941 | Sunk between 9 and 12 September 1943 |
| Greenling | United States Navy | Gato | fleet submarine | 2,424 | 21 January 1942 | Sold for scrap 21 June 1960 |
| Grenadier | United States Navy | Tambor | fleet submarine | 2,370 | 1 May 1941 | Scuttled 22 April 1943 |
| Grouper | United States Navy | Gato | fleet submarine | 2,424 | 12 February 1942 | Sold for scrap 11 August 1970 |
| Growler | United States Navy | Gato | fleet submarine | 2,424 | 20 March 1942 | Sunk 8 November 1944 |
| Grunion | United States Navy | Gato | fleet submarine | 2,424 | 11 April 1942 | Sunk ca. 30 July 1942 |
| Guacolda | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1949 |
| Guale | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1945 |
| Guardfish | United States Navy | Gato | fleet submarine | 2,424 | 8 May 1942 | Sunk as target 10 October 1961 |
| Guavina | United States Navy | Gato | fleet submarine | 2,424 | 23 December 1943 | Sunk as target 14 November 1967 |
| Guglielmo Marconi | Regia Marina | Marconi | submarine | 1,490 | 2 February 1940 | Missing after 28 October 1941 |
| Guglielmotti | Regia Marina | Brin | submarine | 1,380 | 12 October 1938 | Sunk 17 March 1942 |
| Guitarro | United States Navy | Gato | fleet submarine | 2,424 | 26 January 1944 | Sold for scrap December 1959 |
| Gunnel | United States Navy | Gato | fleet submarine | 2,424 | 20 August 1942 | Transferred to Turkey as Preveze 7 August 1954; scrapped September 1983 |
| Gür | Turkish Navy | | submarine | 968 | 29 December 1936 | Decommissioned 1947 |
| Gurnard | United States Navy | Gato | fleet submarine | 2,424 | 18 September 1942 | Sold for scrap 29 October 1961 |
| H1 | Regia Marina | H | submarine | 520 | 23 December 1916 | Stricken 23 March 1947 |
| H2 | Regia Marina | H | submarine | 520 | 15 December 1916 | Stricken 23 March 1947 |
| H4 | Regia Marina | H | submarine | 520 | 15 May 1917 | Stricken 23 March 1947 |
| H6 | Regia Marina | H | submarine | 520 | 23 July 1917 | Scuttled 1 September 1943 |
| H8 | Regia Marina | H | submarine | 520 | 27 June 1918 | Sunk 5 June 1943 |
| H28 | Royal Navy | H | submarine | 510 | 29 June 1918 | Scrapped 18 August 1944 |
| H31 | Royal Navy | H | submarine | 510 | 21 February 1919 | Sunk 24 December 1941 |
| H32 | Royal Navy | H | submarine | 510 | 14 May 1919 | Scrapped 18 October 1944 |
| H33 | Royal Navy | H | submarine | 510 | 17 May 1919 | Scrapped 19 May 1944 |
| H34 | Royal Navy | H | submarine | 510 | 10 September 1919 | Scrapped July 1945 |
| H43 | Royal Navy | H | submarine | 510 | 25 November 1919 | Scrapped November 1944 |
| H44 | Royal Navy | H | submarine | 510 | 15 April 1920 | Scrapped February 1945 |
| H49 | Royal Navy | H | submarine | 510 | 25 October 1919 | Sunk 18 October 1940 |
| H50 | Royal Navy | H | submarine | 510 | 3 February 1920 | Scrapped July 1945 |
| Ha-101 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 22 November 1944 | Scrapped or scuttled October 1945 |
| Ha-102 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 6 December 1944 | Scrapped or scuttled October 1945 |
| Ha-103 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 3 February 1945 | Scuttled 1 April 1946 |
| Ha-104 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 1 December 1944 | Scuttled October 1945 |
| Ha-105 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 19 February 1945 | Scuttled 1 April 1946 |
| Ha-106 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 15 December 1944 | Scuttled 1 April 1946 |
| Ha-107 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 7 February 1945 | Scuttled 1 April 1946 |
| Ha-108 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 6 May 1945 | Scuttled 1 April 1946 |
| Ha-109 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 10 March 1945 | Scuttled 1 April 1946 |
| Ha-111 | Imperial Japanese Navy | Ha-101 | transport submarine | 493 | 13 July 1945 | Scuttled 1 April 1946 |
| Ha-201 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 31 May 1945 | Scuttled 1 April 1946 |
| Ha-202 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 31 May 1945 | Scuttled 1 April 1946 |
| Ha-203 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 20 June 1945 | Scuttled 1 April 1946 |
| Ha-204 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 25 June 1945 | Wrecked 29 October 1945 |
| Ha-205 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 3 July 1945 | Scuttled 9 May 1946 |
| Ha-207 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 14 August 1945 | Scuttled 5 April 1946 |
| Ha-208 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 4 August 1945 | Scuttled 1 April 1946 |
| Ha-209 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 4 August 1945 | Wrecked 18 August 1945 |
| Ha-210 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 11 August 1945 | Scuttled 5 April 1946 |
| Ha-216 | Imperial Japanese Navy | Ha-201 | submarine | 440 | 16 August 1945 | Scuttled 5 April 1946 |
| Hackleback | United States Navy | Balao | fleet submarine | 2,391 | 7 November 1944 | Sold for scrap 4 December 1968 |
| Haddo | United States Navy | Gato | fleet submarine | 2,424 | 9 October 1942 | Sold for scrap 4 May 1959 |
| Haddock | United States Navy | Gato | fleet submarine | 2,424 | 14 March 1942 | Sold for scrap 23 August 1960 |
| Hake | United States Navy | Gato | fleet submarine | 2,424 | 30 October 1942 | Sold for scrap 5 December 1972 |
| Halibut | United States Navy | Gato | fleet submarine | 2,424 | 10 April 1942 | Sold for scrap 9 December 1946 |
| Hammerhead | United States Navy | Gato | fleet submarine | 2,424 | 1 March 1944 | Transferred to Turkey as Cerbe 23 October 1954; decommissioned 4 May 1972; scrapped |
| Harder | United States Navy | Gato | fleet submarine | 2,424 | 2 December 1942 | Sunk 24 August 1944 |
| Hardhead | United States Navy | Balao | fleet submarine | 2,391 | 18 April 1944 | Transferred to Greece as Papanikolis 26 July 1972; sold for scrap 1993 |
| Hawkbill | United States Navy | Balao | fleet submarine | 2,391 | 17 May 1944 | Transferred to the Netherlands as Zeeleeuw 21 April 1953; sold for scrap, 24 November 1970 |
| Henri Poincaré | French Navy | Redoutable | cruiser submarine | 1,968 | 23 December 1931 | Scuttled 27 November 1942; refloated; scrapped September 1943 |
| Herring | United States Navy | Gato | fleet submarine | 2,424 | 4 May 1942 | Sunk 1 June 1944 |
| Hoe | United States Navy | Gato | fleet submarine | 2,424 | 16 December 1942 | Sold for scrap 10 September 1960 |
| Hrabri | Royal Yugoslav Navy Regia Marina | Hrabri | submarine | 1,164 | 1927 | Captured and scrapped by the Italians in 1941 |
| Humaytá | Brazilian Navy | Balilla (Modified) | cruiser submarine | 1,884 | 20 July 1929 | Decommissioned 25 November 1950 |
| I-1 | Imperial Japanese Navy | Type J1 | cruiser submarine | 2,791 | 10 March 1926 | Wrecked 29 January 1943 |
| I-2 | Imperial Japanese Navy | Type J1 | cruiser submarine | 2,791 | 24 July 1926 | Sunk 7 April 1944 |
| I-3 | Imperial Japanese Navy | Type J1 | cruiser submarine | 2,791 | 30 November 1926 | Sunk 9 December 1942 |
| I-4 | Imperial Japanese Navy | Type J1 | cruiser submarine | 2,791 | 24 December 1929 | Sunk 21 December 1942 |
| I-5 | Imperial Japanese Navy | Type J1 Modified | submarine aircraft carrier | 2,921 | 31 July 1932 | Sunk 19 July 1944 |
| I-6 | Imperial Japanese Navy | Type J2 | submarine aircraft carrier | 2,921 | 15 May 1935 | Sunk 16 June 1944 |
| I-7 | Imperial Japanese Navy | Type J3 | submarine aircraft carrier | 3,583 | 31 March 1937 | Wrecked 22 June 1943 |
| I-8 | Imperial Japanese Navy | Type J3 | submarine aircraft carrier | 3,583 | 5 December 1938 | Sunk 31 March 1945 |
| I-9 | Imperial Japanese Navy | Type A1 | submarine aircraft carrier | 4,129 | 13 February 1941 | Sunk 13 June 1943 |
| I-10 | Imperial Japanese Navy | Type A1 | submarine aircraft carrier | 4,129 | 31 October 1941 | Sunk 4 July 1944 |
| I-11 | Imperial Japanese Navy | Type A1 | submarine aircraft carrier | 4,129 | 16 May 1942 | Missing after 11 January 1944 |
| I-12 | Imperial Japanese Navy | Type A2 | submarine | 4,150 | 25 May 1944 | Sunk 13 November 1944 |
| I-13 | Imperial Japanese Navy | Type A3 | submarine aircraft carrier | 4,762 | 16 December 1944 | Sunk 16 July 1945 |
| I-14 | Imperial Japanese Navy | Type A3 | submarine aircraft carrier | 4,762 | 14 March 1945 | Sunk as target 28 May 1946 |
| I-15 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 30 September 1940 | Sunk 10 November 1942 |
| I-16 | Imperial Japanese Navy | Type C1 | midget submarine-carrying submarine | 3,561 | 30 March 1940 | Sunk 19 May 1944 |
| I-17 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 24 January 1941 | Sunk 19 August 1943 |
| I-18 | Imperial Japanese Navy | Type C1 | midget submarine-carrying submarine | 3,561 | 31 January 1941 | Sunk 11 February 1943 |
| I-19 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 28 April 1941 | Sunk 25 November 1943 |
| I-20 | Imperial Japanese Navy | Type C1 | midget submarine-carrying submarine | 3,561 | 26 September 1940 | Missing after 31 August 1943 |
| I-21 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 15 July 1941 | Sunk 29 November 1943 |
| I-22 | Imperial Japanese Navy | Type C1 | midget submarine-carrying submarine | 3,561 | 10 March 1941 | Sunk 6 October 1942 |
| I-23 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 27 September 1941 | Missing after 24 February 1942 |
| I-24 | Imperial Japanese Navy | Type C1 | midget submarine-carrying submarine | 3,561 | 31 October 1941 | Sunk 1 June 1943 |
| I-25 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 15 October 1941 | Sunk 3 September 1943 |
| I-26 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 6 November 1941 | Sunk 26 October 1944 |
| I-27 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 24 February 1942 | Sunk 12 February 1944 |
| I-28 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 6 February 1942 | Sunk 17 May 1942 |
| I-29 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 27 February 1942 | Sunk 26 July 1944 |
| I-30 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 28 February 1942 | Sunk 13 October 1942 |
| I-31 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 30 May 1942 | Sunk 13 May 1943 |
| I-32 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 26 April 1942 | Sunk 24 March 1944 |
| I-33 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 26 April 1942 | Sank in diving accident 13 June 1944 |
| I-34 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 31 August 1942 | Sunk 13 November 1943 |
| I-35 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 31 August 1942 | Sunk 23 November 1943 |
| I-36 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 30 September 1942 | Scuttled 1 April 1946 |
| I-37 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 10 March 1943 | Sunk 19 November 1944 |
| I-38 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 31 January 1943 | Sunk 13 November 1944 |
| I-39 | Imperial Japanese Navy | Type B1 | submarine aircraft carrier | 3,654 | 22 April 1943 | Missing after 25 November 1943 |
| I-40 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 31 July 1943 | Missing after 22 November 1943 |
| I-41 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 18 September 1943 | Sunk 18 November 1944 |
| I-42 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 3 November 1943 | Sunk 23 March 1944 |
| I-43 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 5 November 1943 | Sunk 15 February 1944 |
| I-44 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 31 January 1944 | Missing April 1945 |
| I-45 | Imperial Japanese Navy | Type B2 | submarine | 3,700 | 28 December 1943 | Sunk 29 October 1944 |
| I-46 | Imperial Japanese Navy | Type C2 | submarine | 3,621 | 29 February 1944 | Missing October 1944 |
| I-47 | Imperial Japanese Navy | Type C2 | submarine | 3,621 | 10 July 1944 | Scuttled 1 April 1946 |
| I-48 | Imperial Japanese Navy | Type C2 | submarine | 3,621 | 5 September 1944 | Sunk 23 January 1945 |
| I-52 | Imperial Japanese Navy | Type C3 | transport submarine | 3,644 | 28 December 1943 | Sunk 24 June 1944 |
| I-53 | Imperial Japanese Navy | Type C3 | submarine | 3,644 | 20 February 1944 | Scuttled 1 April 1946 |
| I-54 | Imperial Japanese Navy | Type B3 | submarine aircraft carrier | 3,747 | 31 March 1944 | Missing after 23 October 1944 |
| I-55 | Imperial Japanese Navy | Type C3 | transport submarine | 3,644 | 20 April 1944 | Missing after 13 July 1944 |
| I-56 | Imperial Japanese Navy | Type B3 | submarine aircraft carrier | 3,747 | 8 June 1944 | Missing April 1945 |
| I-58 | Imperial Japanese Navy | Type B3 | submarine aircraft carrier | 3,747 | 7 September 1944 | Scuttled 1 April 1946 |
| I-60 | Imperial Japanese Navy | KD3 type | cruiser submarine | 2,300 | 24 December 1929 | Sunk 17 January 1942 |
| I-64 | Imperial Japanese Navy | KD4 type | cruiser submarine | 2,300 | 30 August 1930 | Sunk 17 May 1942 |
| I-70 | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 9 November 1935 | Sunk 10 December 1941 |
| I-73 | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 7 January 1937 | Sunk 27 January 1942 |
| I-121 (ex-I-21) | Imperial Japanese Navy | Kiraisen type | minelayer submarine | 1,768 | 31 March 1927 | Scuttled 30 April 1946 |
| I-122 (ex-I-22) | Imperial Japanese Navy | Kiraisen type | minelayer submarine | 1,768 | 28 October 1928 | Sunk 10 June 1945 |
| I-123 (ex-I-23) | Imperial Japanese Navy | Kiraisen type | minelayer submarine | 1,768 | 28 April 1928 | Sunk 29 August 1942 |
| I-124 (ex-I-24) | Imperial Japanese Navy | Kiraisen type | minelayer submarine | 1,768 | 10 December 1928 | Sunk 20 January 1942 |
| I-152 (ex-I-52) | Imperial Japanese Navy | KD2 type | training submarine | 2,500 | 1 November 1924 | Scrapped 1946–1948 |
| I-153 (ex-I-53) | Imperial Japanese Navy | KD3A type | submarine | 2,300 | 30 March 1927 | Scuttled May 1946 |
| I-154 (ex-I-54) | Imperial Japanese Navy | KD3A type | submarine | 2,300 | 15 December 1927 | Scuttled May 1946 |
| I-155 (ex-I-55) | Imperial Japanese Navy | KD3A type | submarine | 2,300 | 5 September 1927 | Scuttled 8 May 1946 |
| I-156 (ex-I-56) | Imperial Japanese Navy | KD3B type | submarine | 2,300 | 31 March 1929 | Scuttled 1 April 1946 |
| I-157 (ex-I-57) | Imperial Japanese Navy | KD3B type | submarine | 2,300 | 15 May 1928 | Scuttled 1 April 1946 |
| I-158 (ex-I-58) | Imperial Japanese Navy | KD3A type | submarine | 2,300 | 24 December 1929 | Scuttled 1 April 1946 |
| I-159 (ex-I-59) | Imperial Japanese Navy | KD3B type | submarine | 2,300 | 31 March 1930 | Scuttled 1 April 1946 |
| I-162 (ex-I-62) | Imperial Japanese Navy | KD4 type | submarine | 2,300 | 24 April 1930 | Scuttled 1 April 1946 |
| I-165 (ex-I-65) | Imperial Japanese Navy | KD5 type | submarine | 2,330 | 1 December 1932 | Sunk 27 June 1945 |
| I-166 (ex-I-66) | Imperial Japanese Navy | KD5 type | submarine | 2,330 | 10 November 1932 | Sunk 17 July 1944 |
| I-168 (ex-I-68) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 31 July 1934 | Sunk 27 July 1943 |
| I-169 (ex-I-69) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 28 September 1935 | Sank in diving accident 4 April 1944 |
| I-171 (ex-I-71) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 24 December 1935 | Sunk 1 February 1944 |
| I-172 (ex-I-72) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 7 January 1937 | Sunk October–November 1942 |
| I-174 (ex-I-74) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 15 August 1938 | Sunk 12 April 1944 |
| I-175 (ex-I-75) | Imperial Japanese Navy | KD6 type | cruiser submarine | 2,440 | 8 December 1938 | Sunk 4 February 1944 |
| I-176 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 4 August 1942 | Sunk 16 May 1944 |
| I-177 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 28 December 1942 | Sunk 3 October 1944 |
| I-178 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 26 December 1942 | Missing June 1943 |
| I-179 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 18 June 1943 | Sank 14 July 1944 |
| I-180 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 15 January 1943 | Sunk 27 April 1944 |
| I-181 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 24 May 1943 | Wrecked 16 January 1944 |
| I-182 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 10 May 1943 | Sunk 1 September 1944 |
| I-183 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 3 October 1943 | Sunk 29 April 1944 |
| I-184 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 15 October 1943 | Sunk 19 June 1944 |
| I-185 | Imperial Japanese Navy | KD7 type | cruiser submarine | 2,602 | 23 September 1943 | Sunk 22 June 1944 |
| I-201 | Imperial Japanese Navy | Sentaka type | submarine | 1,479 | 2 February 1945 | Sunk as target 23 May 1946 |
| I-202 | Imperial Japanese Navy | Sentaka type | submarine | 1,479 | 12 February 1945 | Scuttled 5 April 1946 |
| I-203 | Imperial Japanese Navy | Sentaka type | submarine | 1,479 | 29 May 1945 | Sunk as target 21 May 1946 |
| I-351 | Imperial Japanese Navy | Senho type | submarine tanker | 4,290 | 28 January 1945 | Sunk 14 July 1945 |
| I-361 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 25 May 1944 | Sunk 31 May 1945 |
| I-362 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 23 May 1944 | Sunk 14 January 1945 |
| I-363 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 8 July 1944 | Sunk 29 October 1945 |
| I-364 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 14 June 1944 | Sunk 16 September 1944 |
| I-365 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 1 August 1944 | Sunk 29 November 1944 |
| I-366 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 15 August 1944 | Scuttled 1 April 1946 |
| I-367 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 3 August 1944 | Scuttled 1 April 1946 |
| I-368 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 25 August 1944 | Sunk 26 February 1945 |
| I-369 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 9 October 1944 | Scrapped 1946 |
| I-370 | Imperial Japanese Navy | Type D1 | transport submarine/kaiten carrier | 2,215 | 4 September 1944 | Sunk 26 February 1945 |
| I-371 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 2 October 1944 | Missing February 1945 |
| I-372 | Imperial Japanese Navy | Type D1 | transport submarine | 2,215 | 8 November 1944 | Sunk 18 July 1945 |
| I-373 | Imperial Japanese Navy | Type D2 | transport/tanker submarine | 2,240 | 14 April 1945 | Sunk 14 August 1945 |
| I-400 | Imperial Japanese Navy | Sentoku type | submarine aircraft carrier | 6,560 | 30 December 1944 | Sunk as target 4 June 1946 |
| I-401 | Imperial Japanese Navy | Sentoku type | submarine aircraft carrier | 6,560 | 8 January 1945 | Sunk as target 31 May 1946 |
| I-402 | Imperial Japanese Navy | Sentoku type | submarine tanker | 6,560 | 24 July 1945 | Scuttled 1 April 1946 |
| I-501 (ex-U-181) | Imperial Japanese Navy | Type IXD2 | submarine | 1,771 | 16 July 1945 | Scuttled 12 February 1946 |
| I-502 (ex-U-862) | Imperial Japanese Navy | Type IXD2 | submarine | 1,771 | 15 July 1945 | Scuttled 13 February 1946 |
| I-503 | Imperial Japanese Navy | Marcello | submarine | 1,313 | 10 May 1945 | Former Italian submarine Comandante Cappellini and German UIT-24; scuttled 16 April 1946 |
| I-504 | Imperial Japanese Navy | Marconi | submarine | 1,400 | 10 May 1945 | Former Italian submarine Luigi Torelli and German UIT-25; scuttled 16 April 1946 |
| I-505 (ex-U-219) | Imperial Japanese Navy | Type XB | minelayer submarine | 2,143 | 15 July 1945 | Scuttled 3 February 1946 |
| I-506 (ex-U-195) | Imperial Japanese Navy | Type IXD1 | submarine | 1,771 | 15 July 1945 | Scuttled 15 February 1946 |
| Icefish | United States Navy | Balao | fleet submarine | 2,391 | 10 June 1944 | Transferred to the Netherlands as Walrus 21 February 1953; sold for scrap 15 August 1971 |
| Iku-Turso | Finnish Navy | Vetehinen | submarine | 705 | 13 October 1931 | Decommissioned 1946, scrapped 1950s |
| Irex | United States Navy | Tench | fleet submarine | 2,414 | 14 May 1945 | Sold for scrap 13 September 1971 |
| Iride | Regia Marina | Perla | coastal submarine | 839 | 6 November 1936 | Sunk 22 August 1940 |
| Iris | French Navy | Minerve | submarine | 856 | 15 September 1936 | Decommissioned 1 February 1950 |
| Jack | United States Navy | Gato | fleet submarine | 2,424 | 6 January 1943 | Transferred to Greece as Amfitriti 21 April 1958; sunk as target 5 September 1967 |
| Jalea | Regia Marina | Argonauta | coastal submarine | 1,080 | 16 March 1933 | Stricken 1 February 1948 |
| Jallao | United States Navy | Balao | fleet submarine | 2,391 | 8 July 1944 | Transferred to Spain as Narciso Monturiol 26 June 1974; scuttled 1985 |
| Jantina | Regia Marina | Argonauta | coastal submarine | 1,080 | 1 March 1933 | Sunk 5 July 1941 |
| Jastrząb | Polish Navy | S (Group I) | submarine | 1,062 | 9 July 1923 | Former USS S-25, transferred to United Kingdom as HMS P551 4 November 1941; loaned to Polish government-in-exile 4 November 1941; sunk 2 May 1942 |
| Junon | French Navy Free French Naval Forces | Minerve | submarine | 856 | 20 September 1937 | Decommissioned 6 December 1954, scrapped 1960 |
| K VII | Royal Netherlands Navy | K V | submarine | 649 | 5 September 1922 | Destroyed in a Japanese bombing on 18 February 1942 |
| K VIII | Royal Netherlands Navy | K VIII | submarine | 810 | 15 September 1922 | Stripped and abandoned in 1943 due lack of crew and age |
| K IX | Royal Netherlands Navy Royal Australian Navy | K VIII | submarine | 810 | 21 June 1923 | Transferred to RAN as HMAS K9 on 22 June 1943 |
| K X | Royal Netherlands Navy | K VIII | submarine | 810 | 24 September 1923 | Scuttled on 2 March 1942 at Surabaya to avoid being captured by the Japanese |
| K XI | Royal Netherlands Navy | K XI | submarine | 828 | 24 March 1925 | Stripped and scuttled 1945 / 1946 |
| K XII | Royal Netherlands Navy | K XI | submarine | 828 | 19 May 1925 | Sold in 1946 and scrapped in 1951 |
| K XIII | Royal Netherlands Navy | K XI | submarine | 828 | 29 March 1926 | Scuttled on 2 March 1942 to prevent being captured by the Japanese |
| K XIV | Royal Netherlands Navy | K XIV | submarine | 1,045 | 6 July 1933 | Decommissioned 23 April 1946, stricken 1 June 1946 |
| K XV | Royal Netherlands Navy | K XIV | submarine | 1,045 | 30 December 1933 | Stricken 1 June 1946, sold for scrap December 1950 |
| K XVI | Royal Netherlands Navy | K XIV | submarine | 1,045 | 31 January 1934 | Sunk on 25 December 1941 by a torpedo of the I-166 |
| K XVII | Royal Netherlands Navy | K XIV | submarine | 1,045 | 19 December 1933 | Struck and sunk by a Japanese mine on 21 December 1941 |
| K XVIII | Royal Netherlands Navy | K XIV | submarine | 1,045 | 23 March 1934 | Scuttled on 2 March 1942 in order to prevent Japanese capture |
| Kalev | Estonian Navy Soviet Navy | Kalev | minelayer submarine | 853 | 12 March 1937 | Captured by Soviet Union 18 September 1940, missing 29 October 1941 |
| Kete | United States Navy | Balao | fleet submarine | 2,391 | 31 July 1944 | Missing after 20 March 1945 |
| Kingfish | United States Navy | Gato | fleet submarine | 2,424 | 20 May 1942 | Sold for scrap 6 October 1960 |
| Kraken | United States Navy | Balao | fleet submarine | 2,391 | 8 September 1944 | Transferred to Spain as Almirante García de los Reyes 24 October 1959; Stricken 1 April 1982; scrapped |
| Krasnogvardyeyets | Soviet Navy | Dekabrist | submarine | 1,354 | 12 July 1929 | Missing after 10 June 1942 |
| L23 | Royal Navy | L | submarine | 1,106 | 31 October 1924 | Paid off May 1946 |
| L26 | Royal Navy | L | submarine | 1,106 | 11 October 1926 | Sunk as target 1 November 1946 |
| L27 | Royal Navy | L | training submarine | 1,106 | | Scrapped 1944 |
| L'Espoir | French Navy | Redoutable | cruiser submarine | 1,968 | 1 February 1934 | Scuttled 27 November 1942 |
| La Psyché | French Navy | Diane | submarine | 796 | 23 December 1933 | Sunk 8 November 1942 |
| La Sultane | French Navy Free French Naval Forces | Argonaute | submarine | 785 | 20 May 1935 | Joined the Free French Naval Forces December 1942; sold for scrap 14 August 1946 |
| La Sibylle | French Navy | Diane | submarine | 796 | 22 December 1934 | Missing after 8 November 1942 |
| La Vestale | French Navy Free French Naval Forces | Argonaute | submarine | 785 | 18 September 1934 | Joined the Free French Naval Forces December 1942; laid up 1944; sold for scrap 25 March 1946 |
| Lafolè | Regia Marina | Adua | coastal submarine | 843 | 13 August 1938 | Sunk 20 October 1940 |
| Lagarto | United States Navy | Balao | fleet submarine | 2,391 | 14 October 1944 | Sunk 4 May 1945 |
| Lamprey | United States Navy | Balao | fleet submarine | 2,391 | 17 November 1944 | Transferred to Argentina as Santiago del Estero 21 August 1960; scrapped 1974 |
| Lancetfish | United States Navy | Balao | fleet submarine | 2,391 | 12 February 1945 | Sank at pier 15 March 1945; never repaired; sold for scrap 20 August 1959 |
| Lapon | United States Navy | Gato | fleet submarine | 2,424 | 23 January 1943 | Transferred to Greece as Poseidon 10 August 1957; retired April 1976 |
| Le Centaure | French Navy Free French Naval Forces | Redoutable | cruiser submarine | 1,968 | 1 January 1935 | Scrapped June 1952 |
| Le Conquérant | French Navy | Redoutable | cruiser submarine | 1,968 | 7 September 1936 | Sunk 13 November 1942 |
| Le Glorieux | French Navy Free French Naval Forces | Redoutable | cruiser submarine | 1,968 | 1 June 1934 | Scrapped October 1952 |
| Le Héros | French Navy | Redoutable | cruiser submarine | 1,968 | 12 September 1934 | Sunk 7 May 1942 |
| Le Tonnant | French Navy | Redoutable | cruiser submarine | 1,968 | 1 June 1937 | Scuttled 15 November 1942 |
| Lembit | Estonian Navy Soviet Navy | Kalev | minelayer submarine | 853 | 14 May 1937 | Captured by Soviet Union 18 September 1940; museum ship 5 May 1985 |
| Leonardo da Vinci | Regia Marina | Marconi | submarine | 1,490 | 7 April 1940 | Sunk 23 May 1943 |
| Ling | United States Navy | Balao | fleet submarine | 2,391 | 8 June 1945 | Stricken 1 December 1971; museum ship |
| Lionfish | United States Navy | Balao | fleet submarine | 2,391 | 1 November 1944 | Museum ship 30 August 1972 |
| Lizardfish | United States Navy | Balao | fleet submarine | 2,391 | 30 December 1944 | Transferred to Italy as Evangelista Torricelli 9 January 1960; Sold for scrap 1976 |
| Loggerhead | United States Navy | Balao | fleet submarine | 2,391 | 9 February 1945 | Sold for scrap 29 August 1969 |
| Luciano Manara | Regia Marina | Bandiera | submarine | 1,080 | 29 July 1930 | Stricken 1 February 1948 |
| Luigi Settembrini | Regia Marina | Settembrini | submarine | 1,135 | 29 July 1930 | Sunk in collision 15 November 1944 |
| Luigi Torelli | Regia Marina | Marconi | submarine | 1,490 | 15 May 1940 | Seized by Germany September 1943; renamed UIT-25; seized by Japan May 1945; renamed I-504; surrendered August 1945; scuttled 12 February 1946 |
| Macabi | United States Navy | Balao | fleet submarine | 2,391 | 29 March 1945 | Transferred to Argentina as Santa Fe 11 August 1960; scrapped 1974 |
| Macallé | Regia Marina | Adua | coastal submarine | 843 | 1 March 1937 | Wrecked and sank 15 June 1940 |
| Mackerel | United States Navy | Mackerel | submarine | 1,190 | 31 March 1941 | Sold for scrap 24 April 1947 |
| Maggiore Baracca | Regia Marina | Marconi | submarine | 1,490 | 10 July 1940 | Sunk 7 September 1941 |
| Malachite | Regia Marina | Perla | coastal submarine | 839 | 6 November 1936 | Sunk 9 February 1943 |
| Manta | United States Navy | Balao | fleet submarine | 2,391 | 18 December 1944 | Sunk as target 16 July 1969 |
| Mapiro | United States Navy | Balao | fleet submarine | 2,391 | 30 April 1945 | Transferred to Turkey as Piri Reis 18 March 1960; scrapped 1973 |
| Marcantonio Bragadin | Regia Marina | Bragadin | submarine | 981 | 16 November 1931 | Stricken 1 February 1948 |
| Marcantonio Colonna | Regia Marina | Pisani | submarine | 1,040 | 10 July 1929 | Decommissioned 16 April 1942; scrapped 1943 |
| Marcello | Regia Marina | Marcello | submarine | 1,313 | 5 March 1938 | Missing from late February 1941 |
| Marea | Regia Marina | Flutto | submarine | 1,093 | 7 May 1943 | Stricken 1 February 1948; transferred to the Soviet Union 7 February 1949 |
| Marlin | United States Navy | Mackerel | submarine | 1,165 | 1 August 1941 | Sold for scrap 29 March 1946 |
| Marsouin | French Navy Free French Naval Forces | Requin | submarine | 1,132 | 7 September 1927 | Joined Free French Naval Forces ca. December 1942; disarmed April 1944; stricken 28 February 1946 |
| Marsuinul | Royal Romanian Navy | | submarine | 620 | May 1943 | Captured by the Soviets in August 1944, returned 1951 and scrapped 1967 |
| Matchanu | Royal Thai Navy | Matchanu | submarine | 420 | 19 July 1938 | Scrapped in 1952 |
| Medregal | United States Navy | Tench | fleet submarine | 2,414 | 14 April 1945 | Sold for scrap 13 June 1972 |
| Medusa | Regia Marina | Argonauta | coastal submarine | 1,080 | 25 September 1932 | Sunk 30 January 1942 |
| Méduse | French Navy | Diane | submarine | 796 | 1 September 1932 | Wrecked 10 November 1942 |
| Menhaden | United States Navy | Balao | fleet submarine | 2,391 | 22 June 1945 | Sold for scrap 1988 |
| Mero | United States Navy | Balao | fleet submarine | 2,391 | 17 August 1945 | Transferred to Turkey as Hızırreis 20 April 1960; discarded 1977 |
| Michele Bianchi | Regia Marina | Marconi | submarine | 1,490 | 15 April 1940 | Sunk 5 July 1941 |
| Minerve | French Navy Free French Naval Forces | Minerve | submarine | 856 | 15 September 1936 | Wrecked 19 September 1945 |
| Mingo | United States Navy | Gato | fleet submarine | 2,424 | 12 February 1943 | Transferred to Japan as Kuroshio 15 August 1955; sunk as target 1973 |
| Mocenigo | Regia Marina | Marcello | submarine | 1,313 | 14 August 1938 | Sunk 13 May 1943 |
| Monge | French Navy | Redoutable | cruiser submarine | 1,968 | 19 June 1932 | Sunk 8 May 1942 |
| Moray | United States Navy | Balao | fleet submarine | 2,391 | 26 January 1945 | Sunk as target 18 June 1970 |
| Morosini | Regia Marina | Marcello | submarine | 1,313 | 9 November 1938 | Missing after 8 August 1942 |
| Morse (Q119) | French Navy | Requin | submarine | 1,132 | 10 February 1928 | Sunk 16 June 1940 |
| Morse (P87) | Free French Naval Forces | V | submarine | 740 | 1 December 1944 | Formerly HMS Vortex; returned to the United Kingdom 17 September 1946; loaned to Denmark as U 3 (later renamed Sælen) 1947; returned to the United Kingdom 16 January 1958 scrapped September 1958 |
| Murena | Regia Marina | Flutto | submarine | 1,093 | 25 August 1943 | Scuttled 9 September 1943; refloated by Germany; renamed UIT-16; destroyed in port 4 September 1944 |
| Muskallunge | United States Navy | Gato | fleet submarine | 2,424 | 15 March 1943 | Transferred to Brazil as Humaitá 18 January 1957; sunk as target 9 July 1968 |
| Naïade | French Navy | Sirène | submarine | 745 | 1927 | Scuttled 27 November 1942 |
| Naiade | Regia Marina | Sirena | coastal submarine | 837 | 14 November 1933 | Sunk 14 December 1940 |
| Nani | Regia Marina | Marcello | submarine | 1,313 | 5 September 1938 | Sunk 7 January 1941 |
| Narodovolets | Soviet Navy | Dekabrist | submarine | 1,354 | 19 May 1929 | Museum ship 1989 |
| Narval | French Navy | Requin | submarine | 1,132 | 23 July 1926 | Sunk 15 December 1940 |
| Narval | French Navy | Acciaio | coastal submarine | 864 | 2 January 1942 | Formerly Italian submarine Bronzo, captured by Royal Navy 12 July 1943; commissioned as HMS P714; transferred to France 29 January 1944; scrapped 1948 |
| Narvalo | Regia Marina | Squalo | submarine | 1,107 | 6 December 1930 | Sunk 14 January 1943 |
| Narwhal | Royal Navy | Grampus | submarine | 2,157 | 28 February 1936 | Sunk 23 July 1940 |
| Narwhal | United States Navy | V-5 | submarine | 3,900 | 15 May 1930 | Sold for scrap 16 November 1945 |
| Nautilo | Regia Marina | Flutto | submarine | 1,093 | 26 July 1943 | Captured by Germany 9 September 1943; renamed UIT-19, but not commissioned; sunk 9 January 1944; seized and refloated postwar by Yugoslavia; commissioned 1949 as Sava; scrapped 1971 |
| Nautilus | United States Navy | V-5 | submarine | 3,900 | 1 July 1930 | Sold for scrap 16 November 1945 |
| Nautilus | French Navy | Saphir | minelayer submarine | 925 | 15 July 1931 | Captured by Italy 8 December 1942; sunk 31 January 1943; refloated; not repaired; stricken 12 August 1947 |
| Nebojša | Royal Yugoslav Navy | Hrabri | submarine | 1,164 | 1927 | Scrapped in 1958 |
| Neghelli | Regia Marina | Adua | coastal submarine | 843 | 28 February 1938 | Sunk 19 January 1941 |
| Nereide | Regia Marina | Sirena | coastal submarine | 837 | 18 February 1934 | Sunk 13 July 1943 |
| Nichelio | Regia Marina | Acciaio | coastal submarine | 864 | 30 July 1942 | Stricken 1 February 1948; transferred to Soviet Union 1949; scrapped 1960 |
| O 9 | Royal Netherlands Navy | O 9 | submarine | 656 | 18 January 1926 | Scrapped October 1946 |
| O 10 | Royal Netherlands Navy | O 9 | submarine | 656 | 1 September 1926 | Scrapped October 1946 |
| O 11 | Royal Netherlands Navy | O 9 | submarine | 656 | 18 January 1926 | Sunk in 1940 after taking damage from a collision |
| O 12 | Royal Netherlands Navy Kriegsmarine | O 12 | submarine | 754 | 20 July 1931 | Scuttled in 1940, raised by Nazi Germany's Kriegsmarine and taken into service as U-D2 |
| O 13 | Royal Netherlands Navy | O 12 | submarine | 754 | 1 October 1931 | Lost during patrol in the North Sea on 25 June 1940 |
| O 14 | Royal Netherlands Navy | O 12 | submarine | 754 | 4 March 1932 | Decommissioned in 1943 due to a lack of replacement engines |
| O 15 | Royal Netherlands Navy | O 12 | submarine | 754 | 28 July 1932 | Paid off 2 October 1946 |
| O 16 | Royal Netherlands Navy | O 16 | submarine | 1,194 | 27 January 1936 | Sunk by mine on 15 December 1941 |
| O 19 | Royal Netherlands Navy | O 19 | submarine | 1,491 | 22 September 1938 | Scuttled on 10 July 1945 |
| O 20 | Royal Netherlands Navy | O 19 | submarine | 1,491 | 28 August 1939 | Sunk 19 December 1941 |
| O 21 | Royal Netherlands Navy | O 21 | submarine | 1,205 | 10 May 1940 | Sold for scrap 24 January 1958 |
| O 22 | Royal Netherlands Navy | O 21 | submarine | 1,205 | 10 May 1940 | Lost during a patrol in the North Sea in 1940 |
| O 23 | Royal Netherlands Navy | O 21 | submarine | 1,205 | 13 May 1940 | Sold for scrap April 1949 |
| O 24 | Royal Netherlands Navy | O 21 | submarine | 1,205 | 13 May 1940 | Sold for scrap 1963 |
| O 25 | Royal Netherlands Navy Kriegsmarine | O 21 | submarine | 1,205 | 8 June 1941 | Captured during the invasion of the Netherlands and commissioned in the Kriegsmarine as U-D3 |
| O 26 | Royal Netherlands Navy Kriegsmarine | O 21 | submarine | 1,205 | 28 January 1941 | Captured during the invasion of the Netherlands and commissioned in the Kriegsmarine as U-D4 |
| O 27 | Royal Netherlands Navy Kriegsmarine | O 21 | submarine | 1,205 | 26 September 1941 | Captured during the invasion of the Netherlands and commissioned in the Kriegsmarine as U-D5 |
| O-2 | United States Navy | O | submarine | 629 | 19 October 1918 | Sold for scrap 16 November 1945 |
| O-3 | United States Navy | O | submarine | 629 | 13 June 1918 | Sold for scrap 4 September 1946 |
| O-4 | United States Navy | O | submarine | 629 | 29 May 1918 | Decommissioned 20 September 1945, scrapped 1 February 1946 |
| O-6 | United States Navy | O | submarine | 629 | 12 June 1918 | Sold for scrap 4 September 1946 |
| O-7 | United States Navy | O | submarine | 629 | 4 July 1918 | Sold for scrap 22 January 1946 |
| O-8 | United States Navy | O | submarine | 629 | 11 July 1918 | Sold for scrap 4 September 1946 |
| O-9 | United States Navy | O | submarine | 629 | 27 July 1918 | Foundered 20 June 1941 |
| O-10 | United States Navy | O | submarine | 629 | 17 August 1918 | Sold for scrap 21 August 1946 |
| Oberon | Royal Navy | Odin | submarine | 1,922 | 24 August 1927 | Paid off 5 July 1944 |
| Odax | United States Navy | Tench | fleet submarine | 2,414 | 11 July 1945 | Transferred to Brazil as Rio de Janeiro 8 July 1972; scrapped 1981 |
| Odin | Royal Navy | Odin | submarine | 2,038 | 21 December 1929 | Sunk 14 June 1940 |
| Ouessant | French Navy | Redoutable | cruiser submarine | 1,968 | 1 January 1939 | Scuttled 18 June 1940 |
| Olympus | Royal Navy | Odin | submarine | 2,038 | 14 June 1930 | Sunk 8 May 1942 |
| Onice | Regia Marina | Perla | coastal submarine | 839 | 1 September 1936 | Stricken 1 February 1948 |
| Ondina | Regia Marina | Sirena | coastal submarine | 837 | 19 September 1934 | Sunk 11 July 1942 |
| Ondine | French Navy Free French Naval Forces | Orion | submarine | 775 | 5 July 1932 | Stricken April 1943 and dismantled for spare parts |
| Oréade | French Navy | Diane | submarine | 796 | 14 December 1933 | Sunk 8 November 1942 |
| Orion | French Navy Free French Naval Forces | Orion | submarine | 775 | 5 July 1932 | Stricken April 1943 and dismantled for spare parts |
| Orphée | French Navy Free French Naval Forces | Diane | submarine | 796 | 8 June 1933 | Stricken 15 April 1946 |
| Orpheus | Royal Navy | Odin | submarine | 2,038 | 23 September 1930 | Sunk 19 June 1940 |
| Orzeł | Polish Navy | Orzeł | submarine | 1,473 | 2 February 1939 | Lost 8 June 1940 |
| Osiris | Royal Navy | Odin | submarine | 2,038 | 25 January 1929 | Paid off 7 March 1945 |
| Osvetnik | Royal Yugoslav Navy Regia Marina | Ostevnik | submarine | 809 | 14 January 1929 | Captured by Italy 1941, scuttled by Germany in 1943 |
| Oswald | Royal Navy | Odin | submarine | 2,038 | 1 May 1929 | Sunk 1 August 1940 |
| Otaria | Regia Marina | Glauco | submarine | 1,305 | 20 October 1935 | Stricken 1 February 1948 |
| Otus | Royal Navy | Odin | submarine | 2,038 | 5 July 1929 | Paid off March 1946 |
| Otway | Royal Navy | Odin | submarine | 1,922 | 15 June 1927 | Paid off 1945 |
| Oxley | Royal Navy | Odin | submarine | 1,922 | 1 April 1927 | Sunk by friendly fire 10 September 1939 |
| P31 | Royal Navy | U | submarine | 730 | 2 April 1941 | Renamed Ullswater February 1943; renamed Uproar April 1943; sold for scrap 13 February 1946 |
| P32 | Royal Navy | U | submarine | 730 | 3 May 1941 | Sunk 18 August 1941 |
| P33 | Royal Navy | U | submarine | 730 | 30 May 1941 | Missing after 6 August 1941 |
| P36 | Royal Navy | U | submarine | 730 | 24 September 1941 | Sunk 1 April 1942 |
| P38 | Royal Navy | U | submarine | 730 | 17 October 1941 | Sunk 23 February 1942 |
| P39 | Royal Navy | U | submarine | 730 | 16 November 1941 | Damaged beyond repair 26 March 1942; scrapped 1954 |
| P48 | Royal Navy | U | submarine | 730 | 18 June 1942 | Sunk 25 December 1942 |
| P222 | Royal Navy | S (Third Group) | submarine | 990 | 4 March 1942 | Sunk 12 December 1942 |
| P311 | Royal Navy | T | submarine | 1,560 | 7 August 1942 | Sunk 8 January 1943 |
| P511 | Royal Navy | R | training submarine | 680 | 17 April 1919 | Former USS R-3, transferred to United Kingdom 4 November 1941; scrapped 1948 |
| P512 | Royal Navy | R | training submarine | 680 | 17 August 1918 | Former USS R-17, transferred to United Kingdom 9 March 1942; sold for scrap 6 November 1945 |
| P514 | Royal Navy | R | training submarine | 680 | 7 October 1918 | Former USS R-19, transferred to United Kingdom 9 March 1942; sunk 21 June 1942 |
| P551 | Royal Navy | S (Holland design) | submarine | 1,062 | 9 July 1923 | Former USS S-25, transferred to United Kingdom 4 November 1941; loaned to Polish government-in-exile as Jastrząb 4 November 1941; sunk 2 May 1942 |
| P552 | Royal Navy | S (Navy design) | submarine | 1,092 | 5 June 1920 | Former USS S-1, transferred to United Kingdom 20 April 1942; sold for scrap 14 September 1945 |
| P553 | Royal Navy | S (Holland design) | submarine | 1,062 | 24 August 1921 | Former USS S-21, transferred to United Kingdom 14 September 1942; sunk as target 23 March 1945 |
| P554 | Royal Navy | S (Holland design) | submarine | 1,062 | 23 June 1924 | Former USS S-22, transferred to United Kingdom 19 June 1942; sold for scrap 16 November 1945 |
| P555 | Royal Navy | S (Holland design) | submarine | 1,062 | 24 August 1923 | Former USS S-24, transferred to United Kingdom 10 August 1942; scuttled 25 August 1947 |
| P556 | Royal Navy | S (Holland design) | submarine | 1,062 | 22 May 1924 | Former USS S-29, transferred to the United Kingdom 5 June 1942; sold for scrap, 24 January 1947 |
| P611 | Royal Navy | Oruç Reis | submarine | 856 | 1 December 1941 | Transferred to Turkey as Oruç Reis 9 May 1942; scrapped 1957 |
| P612 | Royal Navy | Oruç Reis | submarine | 856 | 7 January 1942 | Transferred to Turkey as Murat Reis 16 May 1942; scrapped 1957 |
| P614 | Royal Navy | Oruç Reis | submarine | 856 | 10 March 1942 | Transferred to Turkey 1945; commissioned as Burak Reis 17 January 1946; scrapped 1957 |
| P615 | Royal Navy | Oruç Reis | submarine | 856 | 3 April 1942 | Sunk 18 April 1943 |
| P714 | Royal Navy | Acciaio | coastal submarine | 864 | 2 January 1942 | Formerly Italian submarine Bronzo, captured by Royal Navy 12 July 1943; transferred to France as Narval 29 January 1944; scrapped 1948 |
| Paddle | United States Navy | Gato | fleet submarine | 2,424 | 29 March 1943 | Transferred to Brazil as Riachuelo 18 January 1957; sunk as target ca. 30 June 1968 |
| Pallas | French Navy | Minerve | submarine | 856 | 12 June 1939 | Scuttled 9 November 1942 |
| Pampanito | United States Navy | Balao | fleet submarine | 2,391 | 6 November 1943 | Museum ship 21 November 1975 |
| Pandora | Royal Navy | Parthian | submarine | 2,040 | 30 June 1930 | Sunk 1 April 1942, scrapped 1955 |
| Komissar | Soviet Navy | Bars | submarine | 1,354 | 1916 | Converted to harbor training ship 1941 |
| Parche | United States Navy | Balao | fleet submarine | 2,391 | 20 November 1943 | Sold for scrap 18 June 1970 |
| Pargo | United States Navy | Gato | fleet submarine | 2,424 | 26 April 1943 | Sold for scrap 16 May 1961 |
| Parthian | Royal Navy | Parthian | submarine | 2,040 | 30 June 1930 | Sunk August 1943 |
| Pascal | French Navy | Redoutable | cruiser submarine | 1,968 | 10 September 1931 | Scuttled 27 November 1942; refloated; sunk 11 March 1944 |
| Pasteur | French Navy | Redoutable | cruiser submarine | 1,968 | 1 September 1932 | Scuttled 18 June 1940 |
| Pégase | French Navy | Redoutable | cruiser submarine | 1,968 | 19 June 1932 | Decommissioned 1 January 1944; scrapped 1951 |
| Perch (SS-176) | United States Navy | Porpoise | fleet submarine | 1,997 | 19 November 1936 | Scuttled 3 March 1942 |
| Perch (SS-313) | United States Navy | Balao | fleet submarine | 2,391 | 7 January 1944 | Sold for scrap 15 January 1973 |
| Perla | Regia Marina Royal Navy Hellenic Navy | Perla | coastal submarine | 846 | 8 July 1936 | Captured by UK as HMS P-712 9 July 1942, to Greece as Matrozos 1943, stricken 1947 |
| Perle | French Navy Free French Naval Forces | Saphir | minelayer submarine | 925 | 1 March 1937 | Sunk 8 July 1944 |
| Permit | United States Navy | Porpoise | fleet submarine | 1,997 | 17 March 1937 | Sold for scrap 28 June 1958 |
| Persée | French Navy | Redoutable | cruiser submarine | 1,968 | 10 June 1934 | Sunk 23 September 1940 |
| Perseus | Royal Navy | Parthian | submarine | 2,040 | 15 April 1930 | Sunk 6 December 1941. |
| Peto | United States Navy | Gato | fleet submarine | 2,424 | 21 November 1942 | Sold for scrap 29 November 1960 |
| Phoenix | Royal Navy | Parthian | submarine | 2,040 | 3 February 1931 | Sunk 16 July 1940 |
| Phoque | French Navy | Requin | submarine | 1,132 | 7 May 1928 | Captured by Italy 8 December 1942; renamed FR 111; sunk 28 February 1943 |
| Phlai-chumphon | Royal Thai Navy | Matchanu | submarine | 420 | 19 July 1938 | Scrapped 1952 |
| Pickerel | United States Navy | Porpoise | fleet submarine | 1,997 | 26 January 1937 | Sunk 3 April 1943 |
| Picuda | United States Navy | Balao | fleet submarine | 2,391 | 16 October 1943 | Transferred to Spain as Narciso Monturiol 1 October 1972; Stricken 30 April 1977 |
| Pier Capponi | Regia Marina | Mameli | submarine | 993 | 19 January 1929 | Sunk 31 March 1941 |
| Pietro Calvi | Regia Marina | Calvi | cruiser submarine | 2,028 | 16 October 1935 | Sunk 14 July 1942 |
| Pietro Micca | Regia Marina | | minelayer submarine | 1,883 | 1 October 1935 | Sunk 29 July 1943 |
| Pike | United States Navy | Porpoise | fleet submarine | 1,934 | 2 December 1935 | Sold for scrap 14 January 1957 |
| Pilotfish | United States Navy | Balao | fleet submarine | 2,391 | 16 December 1943 | Sunk as target 25 July 1946 |
| Pintado | United States Navy | Balao | fleet submarine | 2,391 | 1 January 1944 | Sold for scrap 19 February 1969 |
| Pipefish | United States Navy | Balao | fleet submarine | 2,391 | 22 January 1944 | Sold for scrap 4 February 1969 |
| Piper | United States Navy | Balao | fleet submarine | 2,391 | 23 August 1944 | Sold for scrap June 1971 |
| Pipinos | Royal Hellenic Navy | V | submarine | 740 | 1 November 1943 | Formerly HMS Veldt; returned to United Kingdom 10 December 1957; scrapped February 1958 |
| Piranha | United States Navy | Balao | fleet submarine | 2,391 | 5 February 1944 | Sold for scrap 11 August 1970 |
| Plaice | United States Navy | Balao | fleet submarine | 2,391 | 12 February 1944 | Transferred to Brazil as Bahia 7 September 1963; scrapped 1973 |
| Platino | Regia Marina | Acciaio | coastal submarine | 864 | 2 October 1941 | Stricken 1 February 1948 |
| Plunger | United States Navy | Porpoise | fleet submarine | 1,997 | 19 November 1936 | Sold for scrap 22 April 1957 |
| Pogy | United States Navy | Gato | fleet submarine | 2,424 | 10 January 1943 | Sold for scrap 1 May 1959 |
| Pollack | United States Navy | Porpoise | fleet submarine | 1,997 | 15 January 1937 | Sold for scrap 2 February 1947 |
| Pomfret | United States Navy | Balao | fleet submarine | 2,391 | 19 February 1944 | Transferred to Turkey as Oruçreis 1 July 1971; retired 1987 |
| Pompano | United States Navy | Porpoise | fleet submarine | 1,997 | 12 June 1937 | Lost September 1943 |
| Pompon | United States Navy | Gato | fleet submarine | 2,424 | 17 March 1943 | Sold for scrap 22 December 1960 |
| Poncelet | French Navy | Redoutable | cruiser submarine | 1,968 | 1 September 1932 | Scuttled 7 November 1940 |
| Porfido | Regia Marina | Acciaio | coastal submarine | 864 | 24 January 1942 | Sunk 6 December 1942 |
| Porpoise | United States Navy | Porpoise | fleet submarine | 1,934 | 15 August 1935 | Sold for scrap 14 May 1957 |
| Porpoise | Royal Navy | Grampus | submarine | 2,035 | 11 March 1933 | Sunk 19 January 1945 |
| Poseidon | Royal Navy | Parthian | submarine | 2,040 | 5 May 1930 | Sunk in accidental collision with a merchant ship 9 June 1931 |
| Provana | Regia Marina | Marcello | submarine | 1,313 | 25 June 1938 | Sunk 16 June 1940 |
| Protée | French Navy Free French Naval Forces | Redoutable | cruiser submarine | 1,968 | 1 November 1932 | Sunk 20 December 1943 |
| Proteus | Royal Navy | Parthian | submarine | 2,040 | 5 May 1930 | Scrapped March 1946 |
| Puffer | United States Navy | Gato | fleet submarine | 2,424 | 27 April 1943 | Sold for scrap 3 December 1960 |
| Queenfish | United States Navy | Balao | fleet submarine | 2,391 | 11 March 1944 | Sunk as target 14 August 1963 |
| Quidora | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1945 |
| Quillback | United States Navy | Tench | fleet submarine | 2,414 | 29 December 1944 | Sold for scrap 21 March 1974 |
| R-1 | United States Navy | R | coastal submarine | 680 | 16 December 1918 | Sold for scrap 16 March 1946 |
| R-2 | United States Navy | R | coastal submarine | 680 | 24 January 1919 | Sold for scrap 28 September 1945 |
| R-3 | United States Navy | R | coastal submarine | 680 | 28 March 1919 | Transferred to United Kingdom as P511 4 November 1941; scrapped 1948 |
| R-4 | United States Navy | R | coastal submarine | 680 | 17 April 1919 | Sold for scrap January 1946 |
| R-5 | United States Navy | R | coastal submarine | 680 | 15 April 1919 | Sold for scrap 22 August 1946 |
| R-6 | United States Navy | R | coastal submarine | 680 | 1 May 1919 | Sold for scrap March 1946 |
| R-7 | United States Navy | R | coastal submarine | 680 | 12 June 1919 | Sold for scrap September 1946 |
| R-9 | United States Navy | R | coastal submarine | 680 | 30 July 1919 | Sold for scrap February 1946 |
| R-10 | United States Navy | R | coastal submarine | 680 | 20 August 1919 | Sold for scrap January 1946 |
| R-11 | United States Navy | R | coastal submarine | 680 | 5 September 1919 | Scrapped 1948 |
| R-12 | United States Navy | R | coastal submarine | 680 | 23 September 1919 | Sank 12 June 1943 |
| R-13 | United States Navy | R | coastal submarine | 680 | 17 October 1919 | Sold for scrap 13 March 1946 |
| R-14 | United States Navy | R | coastal submarine | 680 | 24 December 1919 | Scrapped 1946 |
| R-15 | United States Navy | R | coastal submarine | 680 | 27 July 1918 | Sold for scrap October 1945 |
| R-16 | United States Navy | R | coastal submarine | 680 | 5 August 1918 | Sold for scrap March 1946 |
| R-17 | United States Navy | R | coastal submarine | 680 | 17 August 1918 | Transferred to United Kingdom as P512 9 March 1942; sold for scrap 6 November 1945 |
| R-18 | United States Navy | R | coastal submarine | 680 | 11 September 1918 | Sold for scrap 1946 |
| R-19 | United States Navy | R | coastal submarine | 680 | 7 October 1918 | Transferred to United Kingdom as P514 9 March 1942; sunk 21 June 1942 |
| R-20 | United States Navy | R | coastal submarine | 680 | 26 October 1918 | Sold for scrap 13 March 1946 |
| Rainbow | Royal Navy | Rainbow | submarine | 2,030 | 18 January 1932 | Sunk 4 October 1940 in collision |
| Rasher | United States Navy | Gato | fleet submarine | 2,424 | 8 June 1943 | Sold for scrap 7 August 1974 |
| Raton | United States Navy | Gato | fleet submarine | 2,424 | 13 July 1943 | Sold for scrap 12 October 1973 |
| Ray | United States Navy | Gato | fleet submarine | 2,424 | 27 July 1943 | Sold for scrap 18 December 1960 |
| Razorback | United States Navy | Balao | fleet submarine | 2,391 | 3 April 1944 | Transferred to Turkey as Muratreis 30 November 1970; museum ship 15 May 2005 |
| Rechinul | Royal Romanian Navy | Rechinul | submarine | 789 | May 1943 | Captured by the Soviets in August 1944, sunk by accident February 1945 |
| Redfin | United States Navy | Gato | fleet submarine | 2,424 | 31 August 1943 | Sold for scrap 31 March 1971 |
| Redfish | United States Navy | Balao | fleet submarine | 2,391 | 12 April 1944 | Sunk as target 6 February 1969 |
| Redoutable | French Navy | Redoutable | cruiser submarine | 1,968 | 10 July 1931 | Scuttled 27 November 1942; refloated 16 May 1943; sunk 11 March 1944 |
| Regent | Royal Navy | Rainbow | submarine | 2,030 | 11 November 1930 | Sunk 18 April 1943 |
| Reginaldo Giuliani | Regia Marina | Liuzzi | submarine | 1,484 | 3 February 1940 | Seized by Germany 8 September 1943; renamed UIT-23; sunk 18 February 1944 |
| Regulus | Royal Navy | Rainbow | submarine | 2,030 | 7 December 1930 | Sunk 6 December 1940 |
| Remo | Regia Marina | R | transport submarine | 2,520 | 19 June 1943 | Sunk 15 July 1943 |
| Requin | French Navy | Requin | submarine | 1,132 | 28 May 1926 | Captured by Italy 8 December 1942; renamed FR 113; captured by Germany 9 September 1943; sold for scrap 1944 |
| Requin | United States Navy | Tench | fleet submarine | 2,414 | 28 April 1945 | Museum ship 1972 |
| Revolutsioner | Soviet Navy | Dekabrist | submarine | 1,354 | 12 March 1929 | Missing after 1 December 1943 |
| Ro-31 | Imperial Japanese Navy | Kaichū V type | training submarine | 1,030 | 10 May 1927 | Scuttled 5 April 1946 |
| Ro-33 | Imperial Japanese Navy | Kaichū VI type | submarine | 1,200 | 7 October 1935 | Sunk 29 August 1942 |
| Ro-34 | Imperial Japanese Navy | Kaichū VI type | submarine | 1,200 | 31 May 1937 | Sunk 7 April 1943 |
| Ro-35 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 25 March 1943 | Sunk 25 August 1943 |
| Ro-36 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 27 May 1943 | Sunk 13 June 1944 |
| Ro-37 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 30 June 1943 | Sunk 22 January 1944 |
| Ro-38 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 24 July 1943 | Missing after 19 November 1943 |
| Ro-39 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 12 September 1943 | Sunk 1 February 1944 |
| Ro-40 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 28 September 1943 | Sunk 16 February 1944 |
| Ro-41 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 26 November 1943 | Sunk 23 March 1945 |
| Ro-42 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 31 August 1943 | Sunk 11 June 1944 |
| Ro-43 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 16 December 1943 | Sunk 26 February 1945 |
| Ro-44 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 13 September 1943 | Sunk 16 June 1944 |
| Ro-45 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 11 January 1944 | Sunk 30 April 1944 |
| Ro-46 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 19 February 1944 | Missing after 17 April 1945 |
| Ro-47 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 31 January 1944 | Sunk 26 September 1944 |
| Ro-48 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 31 March 1944 | Sunk 19 July 1944 |
| Ro-49 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 19 May 1944 | Missing after 25 March 1945 |
| Ro-50 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 31 July 1944 | Scuttled 1 April 1946 |
| Ro-55 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 30 September 1944 | Sunk 7 February 1945 |
| Ro-56 | Imperial Japanese Navy | Kaichū VII type | submarine | 1,447 | 15 November 1944 | Sunk 9 April 1945 |
| Ro-57 | Imperial Japanese Navy | Type L3 | training submarine | 1,102.7 | 30 July 1922 | Scrapped 1946 |
| Ro-58 | Imperial Japanese Navy | Type L3 | training submarine | 1,102.7 | 25 November 1922 | Scrapped 1946 |
| Ro-59 | Imperial Japanese Navy | Type L3 | training submarine | 1,102.7 | 20 March 1923 | Scrapped 1946 |
| Ro-60 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 17 September 1923 | Wrecked 29 December 1941 |
| Ro-61 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 9 February 1924 | Sunk 31 August 1942 |
| Ro-62 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 24 July 1924 | Scuttled May 1946 |
| Ro-63 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 20 December 1924 | Scuttled May 1946 |
| Ro-64 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 30 April 1925 | Sunk 12 April 1945 |
| Ro-65 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 30 June 1926 | Sunk in diving accident 3 November 1942 |
| Ro-66 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 28 July 1927 | Sunk in collision 17 December 1941 |
| Ro-67 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 15 December 1926 | Scrapped 1946 |
| Ro-68 | Imperial Japanese Navy | Type L4 | submarine | 1,301 | 29 October 1925 | Scuttled 30 April 1946 |
| Ro-100 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 23 September 1942 | Sunk 25 November 1943 |
| Ro-101 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 31 October 1942 | Sunk 15 September 1943 |
| Ro-102 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 17 November 1942 | Missing after 9 May 1943 |
| Ro-103 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 21 October 1942 | Missing after 28 July 1943 |
| Ro-104 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 25 February 1943 | Sunk 23 May 1944 |
| Ro-105 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 5 March 1943 | Sunk 31 May 1944 |
| Ro-106 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 26 December 1942 | Sunk 22 May 1944 |
| Ro-107 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 26 December 1942 | Missing after 6 July 1943 |
| Ro-108 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 20 April 1943 | Sunk 26 May 1944 |
| Ro-109 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 30 April 1943 | Sunk 25 April 1945 |
| Ro-110 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 6 July 1943 | Sunk 11 February 1944 |
| Ro-111 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 19 July 1943 | Sunk 10 June 1944 |
| Ro-112 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 14 September 1943 | Sunk 11 February 1945 |
| Ro-113 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 12 October 1943 | Sunk 13 February 1945 |
| Ro-114 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 20 November 1943 | Sunk 17 June 1944 |
| Ro-115 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 30 November 1943 | Sunk 1 February 1945 |
| Ro-116 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 21 January 1944 | Sunk 24 May 1944 |
| Ro-117 | Imperial Japanese Navy | Ko type | coastal submarine | 782 | 31 January 1944 | Sunk 17 June 1944 |
| Ro-500 (ex-U-511) | Imperial Japanese Navy | Type IXC | submarine | 1,213 | 16 September 1943 | Scuttled 30 April 1946 |
| Ro-501 (ex-U-1224) | Imperial Japanese Navy | Type IXC/40 | submarine | 1,237 | 15 February 1944 | Sunk 13 May 1944 |
| Robalo | United States Navy | Gato | fleet submarine | 2,424 | 28 September 1943 | Sunk 26 July 1944 |
| Rock | United States Navy | Gato | fleet submarine | 2,424 | 26 October 1943 | Sold for scrap 17 August 1972 |
| Romolo | Regia Marina | R | transport submarine | 2,520 | 19 June 1943 | Sunk 18 July 1943 |
| Roncador | United States Navy | Balao | fleet submarine | 2,391 | 27 March 1945 | Stricken 1971; scrapped ca. 1982 |
| Ronis | Latvian Naval Forces Soviet Navy | Ronis | submarine | 514 | 1927 | Captured by Soviet Union 13 August 1940, scuttled 24 June 1941 |
| Ronquil | United States Navy | Balao | fleet submarine | 2,391 | 22 April 1944 | Transferred to Spain as Isaac Peral 1 July 1971; decommissioned 3 April 1984 |
| Rorqual | Royal Navy | Grampus | submarine | 2,157 | 10 February 1937 | Scrapped 1946 |
| Rover | Royal Navy | Rainbow | submarine | 2,030 | 29 January 1931 | Scrapped 1946 |
| Rubino | Regia Marina | Sirena | coastal submarine | 837 | 21 March 1934 | Sunk 29 June 1940 |
| Rubis | French Navy Free French Naval Forces | Saphir | minelayer submarine | 925 | 4 April 1933 | Scuttled 31 January 1958 |
| Rucumilla | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1945 |
| Ruggiero Settimo | Regia Marina | Settembrini | submarine | 1,135 | 25 April 1932 | Stricken 23 March 1947 |
| Runner (SS-275) | United States Navy | Gato | fleet submarine | 2,424 | 30 July 1942 | Missing June 1943 |
| Runner (SS-476) | United States Navy | Tench | fleet submarine | 2,414 | 6 February 1945 | Sold for scrap 19 June 1973 |
| Ryś | Polish Navy | Wilk | submarine | 1,250 | 1932 | Interned 17 September 1939, decommissioned 1955, scrapped 1956 |
| S-1 | Soviet Navy | Srednyaya (IX series) | submarine | 1,050 | 11 September 1936 | scuttled 23 June 1941 |
| S-1 | United States Navy | S (Holland design) | submarine | 1,062 | 5 June 1920 | Transferred to the United Kingdom as P552 20 April 1942; sold for scrap 14 September 1945 |
| S-2 | Soviet Navy | Srednyaya (IX series) | submarine | 1,050 | 23 September 1936 | Sunk 3 January 1940 |
| S-3 | Soviet Navy | Srednyaya (IX series) | submarine | 1,050 | 8 July 1938 | Sunk 24 June 1941 |
| S-4 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 October 1939 | Sunk 7 January 1945 |
| S-5 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 October 1939 | Sunk 28 August 1941 |
| S-6 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 October 1939 | Missing after 6 August 1941 |
| S-7 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 June 1940 | Sunk 21 October 1942 |
| S-8 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 June 1940 | Missing after 11 October 1941 |
| S-9 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 31 October 1940 | Missing August 1943 |
| S-10 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 25 December 1940 | Sunk around 28 June 1941 |
| S-11 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 27 June 1941 | Sunk 2 August 1941, raised 1955, scrapped 1957–1958 |
| S-11 | United States Navy | S (Navy design) | submarine | 1,092 | 11 January 1923 | Sold for scrap 28 October 1945 |
| S-12 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 24 July 1941 | Missing 1 August 1943 |
| S-12 | United States Navy | S (Navy design) | submarine | 1,092 | 30 April 1923 | Sold for scrap 28 October 1945 |
| S-13 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 31 July 1941 | Decommissioned 7 September 1954 |
| S-13 | United States Navy | S (Navy design) | submarine | 1,092 | 14 July 1923 | Stricken 19 May 1945; sold for scrap |
| S-14 | United States Navy | S (Navy design) | submarine | 1,092 | 11 February 1921 | Sold for scrap 16 November 1945 |
| S-15 | United States Navy | S (Navy design) | submarine | 1,092 | 17 December 1920 | Sold for scrap 4 December 1946 |
| S-16 | United States Navy | S (Navy design) | submarine | 1,092 | 15 January 1921 | Sunk as target 3 April 1945 |
| S-17 | United States Navy | S (Navy design) | submarine | 1,092 | 1 March 1921 | Sunk as target 5 April 1945 |
| S-18 | United States Navy | S (Holland design) | submarine | 1,062 | 3 April 1924 | Sold for scrap 9 November 1946 |
| S-20 | United States Navy | S (Holland design) | submarine | 1,062 | 22 November 1922 | Sold for scrap 22 January 1946 |
| S-21 | United States Navy | S (Holland design) | submarine | 1,062 | 24 August 1921 | Transferred to United Kingdom as P553 14 September 1942; sunk as target 23 March 1945 |
| S-22 | United States Navy | S (Holland design) | submarine | 1,062 | 23 June 1924 | Transferred to United Kingdom as P554 19 June 1942; sold for scrap 16 November 1945 |
| S-23 | United States Navy | S (Holland design) | submarine | 1,062 | 30 October 1923 | Stricken 16 November 1945; sold for scrap |
| S-24 | United States Navy | S (Holland design) | submarine | 1,062 | 24 August 1923 | Transferred to United Kingdom as P555 10 August 1942; scuttled 25 August 1947 |
| S-26 | United States Navy | S (Holland design) | submarine | 1,062 | 15 October 1923 | Sunk in collision 24 January 1942 |
| S-27 | United States Navy | S (Holland design) | submarine | 1,062 | 22 January 1924 | Wrecked 19 June 1942 |
| S-28 | United States Navy | S (Holland design) | submarine | 1,062 | 13 December 1923 | Sank in diving accident 4 July 1944 |
| S-29 | United States Navy | S (Holland design) | submarine | 1,062 | 22 May 1924 | Transferred to the United Kingdom as P556 5 June 1942; sold for scrap, 24 January 1947 |
| S-30 | United States Navy | S (Holland design) | submarine | 1,062 | 29 October 1920 | Sold for scrap December 1946 |
| S-31 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 19 June 1940 | Decommissioned 14 March 1955 |
| S-31 | United States Navy | S (Holland design) | submarine | 1,062 | 11 May 1922 | Scrapped July 1947 |
| S-32 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 19 June 1940 | Probably sunk 26 June 1942 |
| S-32 | United States Navy | S (Holland design) | submarine | 1,062 | 15 June 1922 | Sold for scrap May 1946 |
| S-33 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 18 November 1940 | Decommissioned 14 March 1955 |
| S-33 | United States Navy | S (Holland design) | submarine | 1,062 | 18 April 1922 | Sold for scrap 1946 |
| S-34 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 29 March 1941 | Sunk 12 November 1941 |
| S-34 | United States Navy | S (Holland design) | submarine | 1,062 | 12 July 1922 | Sold for scrap 1946 |
| S-35 | United States Navy | S (Holland design) | submarine | 1,062 | 17 August 1922 | Sunk as target 4 April 1946 |
| S-36 | United States Navy | S (Holland design) | submarine | 1,062 | 4 April 1923 | Wrecked 20 January 1942 |
| S-37 | United States Navy | S (Holland design) | submarine | 1,062 | 16 July 1923 | Sank under tow 20 February 1945 |
| S-38 | United States Navy | S (Holland design) | submarine | 1,062 | 11 May 1923 | Sunk as target 20 February 1945 |
| S-39 | United States Navy | S (Holland design) | submarine | 1,062 | 14 September 1923 | Wrecked 13 August 1942 |
| S-40 | United States Navy | S (Holland design) | submarine | 1,062 | 20 November 1923 | Scrapped July 1947 |
| S-41 | United States Navy | S (Holland design) | submarine | 1,062 | 15 January 1924 | Sold for scrap November 1946 |
| S-42 | United States Navy | S (second Holland design) | submarine | 1,126 | 20 November 1924 | Sold for scrap November 1946 |
| S-43 | United States Navy | S (second Holland design) | submarine | 1,126 | 31 December 1924 | Sold for scrap 1946 |
| S-44 | United States Navy | S (second Holland design) | submarine | 1,126 | 16 February 1925 | Sunk 7 October 1943 |
| S-45 | United States Navy | S (second Holland design) | submarine | 1,126 | 31 March 1925 | Sold for scrap December 1946 |
| S-46 | United States Navy | S (second Holland design) | submarine | 1,126 | 5 June 1925 | Sold for scrap November 1946 |
| S-47 | United States Navy | S (second Holland design) | submarine | 1,126 | 16 September 1925 | Sold for scrap May 1946 |
| S-48 | United States Navy | S (second Navy design) | submarine | 1,230 | 14 October 1922 | Sold for scrap 22 January 1946 |
| S-51 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 November 1941 | Decommissioned 7 September 1954, preserved as memorial 1973 |
| S-52 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 9 June 1943 | Stricken 24 August 1954 and transferred to the People's Republic of China |
| S-53 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 30 January 1943 | Stricken 24 August 1954 and transferred to the People's Republic of China |
| S-54 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 31 December 1940 | Missing 5 March 1944 |
| S-55 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 25 July 1941 | Lost December 1943 |
| S-56 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 20 October 1941 | Decommissioned 14 March 1955, preserved as museum ship 1975 |
| S-101 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 15 December 1940 | Stricken 17 February 1956, scrapped 1957 |
| S-102 | Soviet Navy | Srednyaya (IX-bis series) | submarine | 1,050 | 16 December 1940 | Decommissioned 14 March 1955 |
| Sabalo | United States Navy | Balao | fleet submarine | 2,391 | 19 June 1945 | Sunk as target 15 February 1973 |
| Safari | Royal Navy | S (Third Group) | submarine | 990 | 14 March 1942 | Sank under tow 8 January 1946 |
| Saga | Royal Navy | S (Third Group) | submarine | 990 | 14 June 1945 | Sold to Portugal as Náutilo 11 October 1948; discarded 1969 |
| Sahib | Royal Navy | S (Third Group) | submarine | 990 | 13 May 1942 | Sunk 24 April 1943 |
| Santorre Santarosa | Regia Marina | Bandiera | submarine | 1,080 | 29 July 1930 | Scuttled 20 January 1943 |
| Sailfish | United States Navy | Sargo | fleet submarine | 2,350 | 1 March 1939 | Sold for scrap 18 June 1948 |
| Salmon | Royal Navy | S (Second Group) | submarine | 960 | 8 March 1935 | Sunk 9 July 1940 |
| Salmon | United States Navy | Salmon | fleet submarine | 2,198 | 15 March 1938 | Scrapped 1946 |
| Salpa | Regia Marina | Argonauta | coastal submarine | 1,080 | 12 December 1932 | Sunk 27 June 1941 |
| Sand Lance | United States Navy | Balao | fleet submarine | 2,391 | 9 October 1943 | Transferred to Brazil as Rio Grande do Sul 7 September 1963; stricken 15 September 1972 |
| Sanguine | Royal Navy | S (Third Group) | submarine | 990 | 13 May 1945 | Sold to Israel as Rahav 1958; retired 1968 |
| Saphir | French Navy | Saphir | minelayer submarine | 925 | 30 September 1930 | Captured by Italy 8 December 1942; renamed FR 112; captured bv Germany and scuttled 15 September 1943 |
| Saracen | Royal Navy | S (Third Group) | submarine | 990 | 27 June 1942 | Sunk 14 August 1943 |
| Sargo | United States Navy | Sargo | fleet submarine | 2,350 | 7 February 1939 | Sold for scrap 19 May 1947 |
| Satyr | Royal Navy | S (Third Group) | submarine | 990 | 8 February 1943 | Transferred to French Navy February 1952 |
| Saukko | Finnish Navy | | submarine | 140 | 16 December 1930 | Decommissioned 1947, stricken 1952 |
| Saury | United States Navy | Sargo | fleet submarine | 2,350 | 3 April 1939 | Sold for scrap 19 May 1947 |
| Sawfish | United States Navy | Gato | fleet submarine | 2,424 | 26 August 1942 | Sold for scrap 2 December 1960 |
| Scabbardfish | United States Navy | Balao | fleet submarine | 2,391 | 29 April 1944 | Transferred to Greece as Triaina 26 February 1965; stricken 1980 |
| Scamp | United States Navy | Gato | fleet submarine | 2,424 | 18 September 1942 | Sunk 11 November 1944 |
| Sceptre | Royal Navy | S (Third Group) | submarine | 990 | 15 April 1943 | Sold for scrap September 1949 |
| Scirè | Regia Marina | Adua | coastal submarine | 843 | 25 March 1938 | Sunk 10 August 1942 |
| Scorcher | Royal Navy | S (Third Group) | submarine | 990 | 16 March 1945 | Broken up 1962 |
| Scorpion | United States Navy | Gato | fleet submarine | 2,424 | 1 October 1942 | Missing after 5 January 1944 |
| Scotsman | Royal Navy | S (Third Group) | submarine | 990 | 9 December 1944 | Broken up November 1964 |
| Sculpin | United States Navy | Sargo | fleet submarine | 2,350 | 16 January 1939 | Scuttled 19 November 1943 |
| Scythian | Royal Navy | S (Third Group) | submarine | 990 | 11 August 1944 | Broken up August 1960 |
| Sea Cat | United States Navy | Balao | fleet submarine | 2,391 | 16 May 1944 | Sold for scrap 18 May 1973 |
| Sea Devil | Royal Navy | S (Third Group) | submarine | 990 | 12 May 1945 | Broken up 1966 |
| Sea Devil | United States Navy | Balao | fleet submarine | 2,391 | 24 May 1944 | Sunk as target 24 November 1964 |
| Sea Dog | United States Navy | Balao | fleet submarine | 2,391 | 3 June 1944 | Sold for scrap 18 May 1973 |
| Sea Fox | United States Navy | Balao | fleet submarine | 2,391 | 13 June 1944 | Transferred to Turkey as Burakreis 14 December 1970; stricken 1996 |
| Sea Leopard | United States Navy | Tench | fleet submarine | 2,391 | 11 June 1945 | Transferred to Brazil as Bahia 27 March 1973; sold for scrap 1998 |
| Sea Nymph | Royal Navy | S (Third Group) | submarine | 990 | 3 November 1942 | Broken up 1948 |
| Sea Owl | United States Navy | Balao | fleet submarine | 2,391 | 17 July 1944 | Sold for scrap 3 June 1971 |
| Sea Poacher | United States Navy | Balao | fleet submarine | 2,391 | 31 July 1944 | Transferred to Peru as La Pedrera 1 July 1974; decommissioned 1995 |
| Sea Robin | United States Navy | Balao | fleet submarine | 2,391 | 7 August 1944 | Sold for scrap 3 June 1971 |
| Sea Rover | Royal Navy | S (Third Group) | submarine | 990 | 7 July 1943 | Paid off October 1949 |
| Sea Scout | Royal Navy | S (Third Group) | submarine | 990 | 19 June 1944 | Sold for scrap 1965 |
| Seadog | Royal Navy | S (Third Group) | submarine | 814 | 24 September 1942 | Paid off 24 December 1947 |
| Seadragon | United States Navy | Sargo | fleet submarine | 2,350 | 23 October 1939 | Sold for scrap 2 July 1948 |
| Seahorse | Royal Navy | S (First Group) | submarine | 935 | 2 October 1933 | Sunk 7 January 1940 |
| Seahorse | United States Navy | Balao | fleet submarine | 2,391 | 31 March 1943 | Sold for scrap 4 December 1968 |
| Seal | Royal Navy | Grampus | submarine | 2,157 | 24 May 1939 | Captured by Germany 5 May 1940; commissioned in Kriegsmarine as UB 30 November 1940; scuttled 3 May 1945; refloated and scrapped |
| Seal | United States Navy | Salmon | fleet submarine | 2,198 | 30 April 1938 | Scrapped 1956 |
| Sealion | Royal Navy | S (Second Group) | submarine | 960 | 16 March 1934 | Scuttled 13 March 1945 |
| Sealion (SS-195) | United States Navy | Sargo | fleet submarine | 2,350 | 27 November 1939 | Scuttled 25 December 1941 |
| Sealion (SS-315) | United States Navy | Balao | fleet submarine | 2,391 | 8 March 1944 | Sunk as target 8 July 1978 |
| Searaven | United States Navy | Sargo | fleet submarine | 2,350 | 2 October 1939 | Expended as target 11 September 1948 |
| Seawolf | United States Navy | Sargo | fleet submarine | 2,350 | 1 December 1939 | Sunk by friendly fire 3 October 1944 |
| Seawolf | Royal Navy | S (Second Group) | submarine | 960 | 12 March 1936 | Sold for scrap November 1945 |
| Segundo | United States Navy | Balao | fleet submarine | 2,391 | 9 May 1944 | Sunk as target 8 August 1970 |
| Selene | Royal Navy | S (Third Group) | submarine | 990 | 14 July 1944 | Sold for breaking up 1961 |
| Sennet | United States Navy | Balao | fleet submarine | 2,391 | 22 August 1944 | Sold for scrap 15 June 1973 |
| Sęp | Polish Navy | Orzeł | submarine | 1,473 | 16 April 1939 | Decommissioned 15 September 1969, scrapped 1972 |
| Seraph | Royal Navy | S (Third Group) | submarine | 990 | 27 June 1942 | Paid off 25 October 1962 |
| Serpente | Regia Marina | Argonauta | coastal submarine | 1,080 | 12 November 1932 | Scuttled 12 September 1943 |
| Severn | Royal Navy | River | fleet submarine | 2,680 | 12 January 1935 | Sold for scrap 1946 |
| Sfax | French Navy | Redoutable | cruiser submarine | 1,968 | 7 September 1936 | Sunk 19 December 1940 |
| Shad | United States Navy | Balao | fleet submarine | 2,391 | 12 June 1942 | Sold for scrap 11 July 1960 |
| Shakespeare | Royal Navy | S (Third Group) | submarine | 990 | 10 July 1942 | Paid off 14 July 1946 |
| Shalimar | Royal Navy | S (Third Group) | submarine | 990 | 22 April 1944 | Sold for breaking up July 1950 |
| Shark | Royal Navy | S (Second Group) | submarine | 960 | 31 December 1934 | Sunk 6 July 1940 |
| Shark (SS-174) | United States Navy | Porpoise | fleet submarine | 1,968 | 25 January 1936 | Probably sunk 11 February 1942 |
| Shark (SS-314) | United States Navy | Balao | fleet submarine | 2,391 | 14 February 1944 | Sunk 24 October 1944 |
| Sibyl | Royal Navy | S (Third Group) | submarine | 990 | 16 August 1942 | Broken up 1948 |
| Sickle | Royal Navy | S (Third Group) | submarine | 990 | 1 December 1942 | Probably sunk June 1944 |
| Sidi Ferruch | French Navy | Redoutable | cruiser submarine | 1,968 | 1 January 1939 | Sunk 11 November 1942 |
| Sidon | Royal Navy | S (Third Group) | submarine | 990 | 23 November 1944 | Sunk as target 14 June 1957 |
| Silversides | United States Navy | Gato | fleet submarine | 2,424 | 15 December 1941 | Preserved 24 May 1973 |
| Simoom | Royal Navy | S (Third Group) | submarine | 990 | 30 December 1942 | Sunk November 1943 |
| Sinsamut | Royal Thai Navy | Matchanu | submarine | 420 | 19 July 1938 | Scrapped in 1952 |
| Sirago | United States Navy | Tench | fleet submarine | 2,414 | 13 August 1945 | Sold for scrap 2 May 1973 |
| Sirdar | Royal Navy | S (Third Group) | submarine | 990 | 20 September 1943 | Broken up 1965 |
| Sirena | Regia Marina | Sirena | coastal submarine | 837 | 2 October 1933 | Scuttled 9 September 1943 |
| Sirène | French Navy | Sirène | submarine | 745 | 12 March 1927 | Scuttled 27 November 1942 |
| Skate | United States Navy | Balao | fleet submarine | 2,391 | 15 April 1943 | Sunk as target 5 October 1948 |
| Skipjack | United States Navy | Salmon | fleet submarine | 2,198 | 30 June 1938 | Sunk as nuclear testing target July 1946, raised and expended as target August 1948 |
| Sleuth | Royal Navy | S (Third Group) | submarine | 990 | 8 October 1944 | Broken up 1958 |
| Smeli | Royal Yugoslav Navy Regia Marina | Osvetnik | submarine | 809 | 1 December 1928 | Captured by the Italians in 1941, scuttled in 1943 |
| Smeraldo | Regia Marina | Sirena | coastal submarine | 837 | 29 November 1933 | Lost ca. 25 September 1941 |
| Snapper | United States Navy | Salmon | fleet submarine | 2,198 | 15 December 1937 | Scrapped 1948 |
| Snapper | Royal Navy | S (Second Group) | submarine | 960 | 25 October 1934 | Sunk February 1941 |
| Snook | United States Navy | Gato | fleet submarine | 2,424 | 24 October 1942 | Missing after 8 April 1945 |
| Sokół | Polish Navy | U | submarine | 730 | 19 January 1941 | Transferred to United Kingdom as Urchin 27 July 1945; scrapped September 1949 |
| Solent | Royal Navy | S (Third Group) | submarine | 990 | 7 September 1944 | Broken up 1961 |
| Souffleur | French Navy | Requin | submarine | 1,132 | 10 August 1926 | Sunk 25 June 1941 |
| Spadefish | United States Navy | Balao | fleet submarine | 2,391 | 9 March 1944 | Sold for scrap 17 October 1969 |
| Sparide | Regia Marina | Flutto | submarine | 1,093 | 7 August 1943 | Scuttled 9 September 1943; refloated by Germany; renamed UIT-15; destroyed in port 4 September 1944 |
| Spark | Royal Navy | S (Third Group) | submarine | 990 | 28 December 1943 | Broken up October 1950 |
| Spartakovets | Soviet Navy | Dekabrist | submarine | 1,354 | 12 October 1929 | Scrapped after 18 January 1956 |
| Spearfish | Royal Navy | S (Second Group) | submarine | 960 | 11 December 1936 | Sunk 1 August 1940 |
| Spearfish | United States Navy | Sargo | fleet submarine | 2,350 | 12 July 1939 | Sold for scrap 19 May 1947 |
| Spearhead | Royal Navy | S (Third Group) | submarine | 990 | 21 December 1944 | Sold to Portugal as Neptuno August 1948; scrapped 1967 |
| Spidola | Latvian Naval Forces Soviet Navy | Ronis | submarine | 514 | 1927 | Captured by Soviet Union 13 August 1940, scuttled 24 June 1941 |
| Spikefish | United States Navy | Balao | fleet submarine | 2,391 | 30 June 1944 | Sunk as target 4 August 1964 |
| Spirit | Royal Navy | S (Third Group) | submarine | 990 | 25 October 1943 | Broken up 1950 |
| Spiteful | Royal Navy | S (Third Group) | submarine | 990 | 6 October 1943 | Loaned to France as Sirène 1952–1958; scrapped 1963 |
| Splendid | Royal Navy | S (Third Group) | submarine | 990 | 8 August 1942 | Scuttled 21 April 1943 |
| Sportsman | Royal Navy | S (Third Group) | submarine | 990 | 21 December 1942 | Transferred to the French Navy 8 July 1952 |
| Spot | United States Navy | Balao | fleet submarine | 2,391 | 3 August 1944 | Transferred to Chile as Simpson 12 January 1962; discarded 1982 |
| Springer | United States Navy | Balao | fleet submarine | 2,391 | 18 October 1944 | Transferred to Chile as Thomson 23 January 1961; sold for scrap 1 September 1972 |
| Springer | Royal Navy | S (Third Group) | submarine | 990 | 2 August 1945 | Sold to Israel as Tanin 9 October 1958; discarded 1972 |
| Spur | Royal Navy | S (Third Group) | submarine | 990 | 18 February 1945 | Sold to Portugal as Narval November 1948; sold for scrap 1 October 1969 |
| Squalo | Regia Marina | Squalo | submarine | 1,107 | 10 October 1931 | Stricken 1 February 1948 |
| Starfish | Royal Navy | S (First Group) | submarine | 935 | 3 July 1933 | Sunk 9 January 1940 |
| Statesman | Royal Navy | S (Third Group) | submarine | 990 | 13 December 1943 | Loaned to France as Sultane 1952–1959; sold for scrap 3 January 1961 |
| Steelhead | United States Navy | Gato | fleet submarine | 2,424 | 7 December 1942 | Sold for scrap 21 December 1960 |
| Sterlet | Royal Navy | S (Second Group) | submarine | 960 | 6 April 1938 | Sunk 18 April 1940 |
| Sterlet | United States Navy | Balao | fleet submarine | 2,391 | 4 March 1944 | Sunk as target 31 January 1969 |
| Stickleback | United States Navy | Balao | fleet submarine | 2,391 | 29 March 1945 | Sunk in collision 29 May 1958 |
| Stingray | United States Navy | Salmon | fleet submarine | 2,198 | 15 March 1938 | Scrapped 1946 |
| Stoic | Royal Navy | S (Third Group) | submarine | 990 | 29 June 1943 | Sold July 1950 |
| Stonehenge | Royal Navy | S (Third Group) | submarine | 990 | 15 June 1943 | Missing March 1944 |
| Storm | Royal Navy | S (Third Group) | submarine | 990 | 9 July 1943 | Scrapped September 1949 |
| Stratagem | Royal Navy | S (Third Group) | submarine | 990 | 9 October 1943 | Sunk 22 November 1944 |
| Strongbow | Royal Navy | S (Third Group) | submarine | 990 | 23 December 1943 | Scrapped April 1946 |
| Stubborn | Royal Navy | S (Third Group) | submarine | 990 | 20 February 1943 | Scuttled 30 April 1946 |
| Sturdy | Royal Navy | S (Third Group) | submarine | 990 | 29 December 1943 | Scrapped 1958 |
| Sturgeon | United States Navy | Salmon | fleet submarine | 2,198 | 25 June 1938 | Scrapped 1948 |
| Sturgeon | Royal Navy | S (First Group) | submarine | 935 | 15 December 1932 | Paid off 17 November 1945 |
| Stygian | Royal Navy | S (Third Group) | submarine | 990 | 16 April 1944 | Broken up July 1959 |
| Subtle | Royal Navy | S (Third Group) | submarine | 990 | 29 February 1944 | Sold for scrapping 28 October 1949 |
| Sunfish | Royal Navy | S (Second Group) | submarine | 960 | 2 July 1937 | Sunk 27 July 1944 |
| Sunfish | United States Navy | Gato | fleet submarine | 2,424 | 15 July 1942 | Sold for scrap 15 December 1960 |
| Supreme | Royal Navy | S (Third Group) | submarine | 990 | 20 May 1944 | Scrapped July 1950 |
| Surcouf | French Navy Free French Naval Forces | | cruiser submarine | 4,304 | 16 April 1934 | Missing 18 February 1942 |
| Surf | Royal Navy | S (Third Group) | submarine | 990 | 18 March 1943 | Scrapped July 1950 |
| Swordfish | Royal Navy | S (First Group) | submarine | 935 | 28 November 1932 | Sunk 7 November 1940 |
| Swordfish | United States Navy | Sargo | fleet submarine | 2,350 | 22 July 1939 | Lost 12 January 1945 |
| Syrtis | Royal Navy | S (Third Group) | submarine | 990 | 23 April 1943 | Missing after 22 March 1944 |
| Taciturn | Royal Navy | T | submarine | 1,560 | 8 October 1944 | Scrapped August 1971 |
| Tactician | Royal Navy | T | submarine | 1,560 | 29 November 1942 | Scrapped December 1963 |
| Taku | Royal Navy | T | submarine | 1,575 | 3 January 1940 | Sold for scrap November 1946 |
| Talent | Royal Navy | T | submarine | 1,560 | 27 July 1945 | Sold for scrap 1 February 1970 |
| Talisman | Royal Navy | T | submarine | 1,575 | 29 June 1940 | Sunk 17 September 1942 |
| Tally-Ho | Royal Navy | T | submarine | 1,560 | 12 April 1943 | Scrapped February 1967 |
| Tambor | United States Navy | Tambor | fleet submarine | 2,370 | 3 June 1940 | Sold for scrap 5 December 1959 |
| Tang | United States Navy | Balao | fleet submarine | 2,391 | 15 October 1943 | Sunk 24 October 1944 |
| Tantalus | Royal Navy | T | submarine | 1,560 | 2 June 1943 | Scrapped November 1950 |
| Tantivy | Royal Navy | T | submarine | 1,560 | 25 July 1943 | Sunk as target 1951 |
| Tapir | Royal Navy | T | submarine | 1,560 | 30 December 1944 | Loaned to the Netherlands as Zeehond 12 July 1948; returned 15 July 1953; scrapped December 1966 |
| Tarpon | United States Navy | Porpoise | fleet submarine | 1,968 | 12 March 1936 | Sold for scrap 8 June 1957; foundered 26 August 1957 |
| Tarpon | Royal Navy | T | submarine | 1,575 | 8 March 1940 | Sunk 14 April 1940 |
| Taurus | Royal Navy | T | submarine | 1,560 | 3 November 1942 | Loaned to the Netherlands as Dolfijn 4 June 1948–7 December 1953; scrapped April 1960 |
| Tautog | United States Navy | Tambor | fleet submarine | 2,370 | 3 July 1940 | Sold for scrap 1 July 1960 |
| Tegualda | Chilean Navy | H | submarine | 434 | 1917 | Scrapped 1945 |
| Telemachus | Royal Navy | T | submarine | 1,560 | 25 October 1943 | Sold for scrap 1 August 1961 |
| Tembien | Regia Marina | Adua | coastal submarine | 843 | 1 July 1938 | Sunk 2 August 1941 |
| Tempest | Royal Navy | T | submarine | 1,575 | 6 December 1941 | Sunk 13 February 1942 |
| Templar | Royal Navy | T | submarine | 1,560 | 15 February 1943 | Sunk as target 1954; refloated 4 December 1958; scrapped July 1959 |
| Tench | United States Navy | Tench | fleet submarine | 2,416 | 6 October 1944 | Sold to Peru for spare parts 16 September 1976 |
| Terrapin | Royal Navy | T | submarine | 1,560 | 22 January 1944 | Scrapped June 1946 |
| Tetrarch | Royal Navy | T | submarine | 1,575 | 15 February 1940 | Sunk 2 November 1941 |
| Thames | Royal Navy | River | fleet submarine | 2,680 | 26 February 1932 | Missing July 1940 |
| Thétis | French Navy | Circé | submarine | 764 | 24 February 1928 | Scuttled 27 November 1942; refloated; not repaired |
| Thetis | Royal Navy | T | submarine | 1,575 | 26 October 1940 | Sank during trial dive 1 June 1939; refloated and repaired; commissioned as HMS Thunderbolt 26 October 1940; sunk 14 March 1943 |
| Thistle | Royal Navy | T | submarine | 1,575 | 4 July 1939 | Sunk 10 April 1940 |
| Thorn | Royal Navy | T | submarine | 1,575 | 26 August 1941 | Sunk 6 August 1942 |
| Thornback | United States Navy | Tench | fleet submarine | 2,416 | 13 October 1944 | Transferred to Turkey as Uluçalireis 1 July 1971; retired 2000; museum ship |
| Thorough | Royal Navy | T | submarine | 1,560 | 1 March 1944 | Scrapped June 1962 |
| Thrasher | Royal Navy | T | submarine | 1,575 | 14 May 1941 | Sold for scrap 9 March 1947 |
| Threadfin | United States Navy | Balao | fleet submarine | 2,391 | 30 August 1944 | Transferred to Turkey as Birinci İnönü 18 August 1972; decommissioned sometime after mid-1998 |
| Thresher | United States Navy | Tambor | fleet submarine | 2,370 | 27 August 1940 | Sold for scrap 18 March 1948 |
| Thule | Royal Navy | T | submarine | 1,560 | 13 May 1944 | Scrapped September 1962 |
| Thunderbolt | Royal Navy | T | submarine | 1,575 | 26 October 1940 | Sunk 14 March 1943 |
| Tigris | Royal Navy | T | submarine | 1,575 | 20 June 1940 | Sunk 27 February 1943 |
| Tigrone | United States Navy | Tench | fleet submarine | 2,416 | 25 October 1944 | Sunk as target 25 October 1976 |
| Tijgerhaai | Royal Netherlands Navy | T | submarine | 1,560 | 28 March 1945 | Sold for scrap 5 November 1965 |
| Tilefish | United States Navy | Balao | fleet submarine | 2,391 | 15 December 1943 | Transferred to Venezuela as Carite 4 May 1960; decommissioned 28 January 1977 |
| Tinosa | United States Navy | Gato | fleet submarine | 2,424 | 15 January 1943 | Scuttled November 1960 |
| Tiptoe | Royal Navy | T | submarine | 1,560 | 10 May 1944 | Scrapped 1975 |
| Tirante | United States Navy | Tench | fleet submarine | 2,416 | 6 November 1944 | Sold for scrap 21 March 1974 |
| Tireless | Royal Navy | T | submarine | 1,560 | 18 April 1945 | Scrapped 1968 |
| Tito Speri | Regia Marina | Mameli | submarine | 993 | 20 August 1929 | Stricken 1 February 1948 |
| Topazio | Regia Marina | Sirena | coastal submarine | 837 | 26 April 1934 | Sunk 12 September 1943 |
| Torbay | Royal Navy | T | submarine | 1,575 | 14 January 1941 | Scrapped March 1947 |
| Toro | United States Navy | Tench | fleet submarine | 2,414 | 8 December 1944 | Sold for scrap April 1965 |
| Torricelli | Regia Marina | Brin | submarine | 1,380 | 7 May 1939 | Sunk 23 June 1940 |
| Torsk | United States Navy | Tench | fleet submarine | 2,414 | 16 December 1944 | Museum ship 26 September 1972 |
| Totem | Royal Navy | T | submarine | 1,560 | 9 January 1945 | Sold to Israel 1965; commissioned as Dakar 10 November 1967; sank ca. 25 January 1968 |
| Tradewind | Royal Navy | T | submarine | 1,560 | 18 October 1943 | Scrapped December 1955 |
| Traveller | Royal Navy | T | submarine | 1,575 | 10 April 1942 | Sunk 4 December 1942 |
| Trenchant | Royal Navy | T | submarine | 1,560 | 26 February 1944 | Sold for scrap 1 July 1963 |
| Trepang | United States Navy | Balao | fleet submarine | 2,391 | 22 May 1944 | Sunk as target 16 September 1969 |
| Trespasser | Royal Navy | T | submarine | 1,560 | 25 September 1942 | Scrapped September 1961 |
| Triad | Royal Navy | T | submarine | 1,575 | 16 September 1939 | Sunk 15 October 1940 |
| Tribune | Royal Navy | T | submarine | 1,575 | 17 October 1939 | Broken up November 1947 |
| Tricheco | Regia Marina | Squalo | submarine | 1,107 | 25 June 1931 | Sunk 18 March 1942 |
| Trident | Royal Navy | T | submarine | 1,575 | 1 October 1939 | Sold for scrap 17 February 1946 |
| Trigger | United States Navy | Gato | fleet submarine | 2,424 | 31 January 1942 | Sunk 28 March 1945 |
| Triton | Royal Navy | T | submarine | 1,575 | 9 November 1938 | Sunk 18 December 1940 |
| Triton | United States Navy | Tambor | fleet submarine | 2,370 | 15 August 1940 | Sunk 15 March 1943 |
| Tritone | Regia Marina | Flutto | submarine | 1,093 | 10 October 1942 | Scuttled 19 January 1943 |
| Triumph | Royal Navy | T | submarine | 1,575 | 2 May 1939 | Sunk 14 January 1942 |
| Trooper | Royal Navy | T | submarine | 1,575 | 29 August 1942 | Sunk 17 October 1943 |
| Trout | United States Navy | Tambor | fleet submarine | 2,370 | 15 November 1940 | Sunk 29 February 1944 |
| Truant | Royal Navy | T | submarine | 1,575 | 31 October 1939 | Sold for scrap 15 December 1945; wrecked under tow December 1946 |
| Truculent | Royal Navy | T | submarine | 1,560 | 31 December 1942 | Sunk in collision 12 January 1950; refloated 14 March 1950; sold for scrap 8 May 1950 |
| Trump | Royal Navy | T | submarine | 1,560 | 25 May 1945 | Sold to Israel as Dolphin 1968; scrapped 1977 |
| Truncheon | Royal Navy | T | submarine | 1,560 | 8 July 1944 | Scrapped August 1971 |
| Trusty | Royal Navy | T | submarine | 1,575 | 30 July 1941 | Scrapped July 1947 |
| Trutta | United States Navy | Tench | fleet submarine | 2,414 | 16 November 1944 | Transferred to Turkey as Cerbe 1 July 1972; decommissioned 23 July 1999 |
| Tudor | Royal Navy | T | submarine | 1,560 | 16 January 1944 | Scrapped September 1962 |
| Tullibee | United States Navy | Gato | fleet submarine | 2,424 | 15 February 1943 | Sunk 26 March 1944 |
| Tuna | Royal Navy | T | submarine | 1,575 | 1 August 1940 | Scrapped June 1946 |
| Tuna | United States Navy | Tambor | fleet submarine | 2,370 | 2 January 1941 | Scuttled 24 September 1948 |
| Tunny | United States Navy | Gato | fleet submarine | 2,424 | 1 September 1942 | Sunk as target 19 June 1970 |
| Turbulent | Royal Navy | T | submarine | 1,575 | 2 December 1941 | Missing after 3 March 1943 |
| Turchese | Regia Marina | Perla | coastal submarine | 846 | 21 September 1936 | Stricken 1 February 1948 |
| Turpin | Royal Navy | T | submarine | 1,560 | 18 December 1944 | sold to Israel 1965; commissioned as Leviathan 1967; scrapped 1978 |
| Turquoise | French Navy | Saphir | minelayer submarine | 925 | 10 September 1930 | Captured by Italy 8 December 1942; renamed FR 116; captured bv Germany and scuttled 8 September 1943 |
| U-1 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 29 June 1935 | Sunk 6 April 1940 |
| U-2 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 25 July 1935 | Sunk 8 April 1944 |
| U-3 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 6 September 1935 | Stricken 1 August 1944, scrapped 1945 |
| U-4 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 17 August 1935 | Stricken 1 August 1944, scrapped 1945 |
| U-5 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 31 August 1935 | Sunk 19 March 1943 |
| U-6 | Kriegsmarine | Type IIA | coastal U-boat | 298 | 7 September 1935 | Scuttled May 1945 |
| U-7 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 18 July 1935 | Sunk 18 February 1944 |
| U-8 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 5 August 1935 | Scuttled 5 May 1945 |
| U-9 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 21 August 1935 | Sunk 20 August 1944, raised and recommissioned by Soviet Union as TS-16 1945, scrapped 12 December 1946 |
| U-10 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 9 September 1935 | Stricken and scrapped 1 August 1944 |
| U-11 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 21 September 1935 | Scuttled 3 May 1945 |
| U-12 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 30 September 1935 | Sunk 8 October 1939 |
| U-13 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 30 November 1935 | Sunk 31 May 1940 |
| U-14 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 18 January 1936 | Scuttled 5 May 1945 |
| U-15 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 7 March 1936 | Sunk 30 January 1940 |
| U-16 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 16 May 1936 | Sunk 25 October 1939 |
| U-17 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 3 December 1935 | Scuttled 5 May 1945 |
| U-18 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 4 January 1936 | Scuttled 25 August 1944 |
| U-19 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 16 January 1936 | Scuttled 10 September 1944 |
| U-20 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 1 February 1936 | Scuttled 10 September 1944 |
| U-21 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 3 August 1936 | Scrapped February 1945 |
| U-22 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 20 August 1936 | Missing 27 March 1940 |
| U-23 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 24 September 1936 | Scuttled 10 September 1944 |
| U-24 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 10 October 1936 | Scuttled 25 August 1944 |
| U-25 | Kriegsmarine | Type IA | U-boat | 966 | 6 April 1936 | Sunk 1 August 1940 |
| U-26 | Kriegsmarine | Type IA | U-boat | 966 | 6 May 1936 | Scuttled 1 July 1940 |
| U-27 | Kriegsmarine | Type VIIA | U-boat | 733 | 12 August 1936 | Sunk 20 September 1939 |
| U-28 | Kriegsmarine | Type VIIA | U-boat | 733 | 12 September 1936 | Sank accidentally 17 March 1944, stricken 4 August 1944 |
| U-29 | Kriegsmarine | Type VIIA | U-boat | 733 | 16 November 1936 | Scuttled 5 May 1945 |
| U-30 | Kriegsmarine | Type VIIA | U-boat | 733 | 8 October 1936 | Scuttled 4 May 1945 |
| U-31 | Kriegsmarine | Type VIIA | U-boat | 733 | 28 December 1936 | Sunk 2 November 1940 |
| U-32 | Kriegsmarine | Type VIIA | U-boat | 733 | 15 April 1937 | Sunk 30 October 1940 |
| U-33 | Kriegsmarine | Type VIIA | U-boat | 733 | 25 July 1936 | Sunk 12 February 1940 |
| U-34 | Kriegsmarine | Type VIIA | U-boat | 733 | 12 September 1936 | Sunk 5 August 1943 |
| U-35 | Kriegsmarine | Type VIIA | U-boat | 733 | 3 November 1936 | Scuttled 29 November 1939 |
| U-36 | Kriegsmarine | Type VIIA | U-boat | 733 | 16 December 1936 | Sunk 4 December 1939 |
| U-37 | Kriegsmarine | Type IXA | U-boat | 1,135 | 4 August 1938 | Scuttled 8 May 1945 |
| U-38 | Kriegsmarine | Type IXA | U-boat | 1,135 | 24 October 1938 | Scuttled 5 May 1945 |
| U-39 | Kriegsmarine | Type IXA | U-boat | 1,135 | 10 December 1938 | Sunk 14 September 1939 |
| U-40 | Kriegsmarine | Type IXA | U-boat | 1,135 | 11 February 1939 | Sunk 13 October 1939 |
| U-41 | Kriegsmarine | Type IXA | U-boat | 1,135 | 22 April 1939 | Sunk 5 February 1940 |
| U-42 | Kriegsmarine | Type IXA | U-boat | 1,135 | 15 July 1939 | Sunk 13 October 1939 |
| U-43 | Kriegsmarine | Type IXA | U-boat | 1,135 | 26 August 1939 | Sunk 30 July 1943 |
| U-44 | Kriegsmarine | Type IXA | U-boat | 1,135 | 4 November 1939 | Sunk 13 March 1940 |
| U-45 | Kriegsmarine | Type VIIB | U-boat | 843 | 25 June 1938 | Sunk 14 October 1939 |
| U-46 | Kriegsmarine | Type VIIB | U-boat | 843 | 2 November 1938 | Scuttled 5 May 1945 |
| U-47 | Kriegsmarine | Type VIIB | U-boat | 843 | 17 December 1938 | Missing 7 March 1941 |
| U-48 | Kriegsmarine | Type VIIB | U-boat | 843 | 22 April 1939 | Scuttled 3 May 1945 |
| U-49 | Kriegsmarine | Type VIIB | U-boat | 843 | 12 August 1939 | Sunk 15 April 1940 |
| U-50 | Kriegsmarine | Type VIIB | U-boat | 843 | 12 December 1939 | Sunk 6 April 1940 |
| U-51 | Kriegsmarine | Type VIIB | U-boat | 843 | 6 August 1938 | Sunk 20 August 1940 |
| U-52 | Kriegsmarine | Type VIIB | U-boat | 843 | 4 February 1939 | Scuttled 3 May 1945 |
| U-53 | Kriegsmarine | Type VIIB | U-boat | 843 | 24 June 1939 | Sunk 23 / 24 February 1940 |
| U-54 | Kriegsmarine | Type VIIB | U-boat | 843 | 23 September 1939 | Sunk 13 March 1940 |
| U-55 | Kriegsmarine | Type VIIB | U-boat | 843 | 21 November 1939 | Missing February 1940 |
| U-56 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 26 November 1938 | Scuttled 3 May 1945 |
| U-57 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 29 December 1938 | Scuttled 3 May 1945 |
| U-58 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 4 February 1939 | Scuttled 3 May 1945 |
| U-59 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 4 March 1939 | Scuttled 3 May 1945 |
| U-60 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 22 July 1939 | Scuttled 5 May 1945 |
| U-61 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 12 August 1939 | Scuttled 5 May 1945 |
| U-62 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 21 December 1939 | Scuttled 5 May 1945 |
| U-63 | Kriegsmarine | Type IIC | coastal U-boat | 336 | 18 January 1940 | Sunk 25 February 1940 |
| U-64 | Kriegsmarine | Type IXB | U-boat | 1,159 | 16 December 1939 | Sunk 13 April 1940 |
| U-65 | Kriegsmarine | Type IXB | U-boat | 1,159 | 15 February 1940 | Sunk 28 April 1941 |
| U-66 | Kriegsmarine | Type IXC | U-boat | 1,213 | 2 January 1941 | Sunk 6 May 1944 |
| U-67 | Kriegsmarine | Type IXC | U-boat | 1,213 | 22 January 1941 | Sunk 16 July 1943 |
| U-68 | Kriegsmarine | Type IXC | U-boat | 1,213 | 11 February 1941 | Sunk 10 April 1944 |
| U-69 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 January 1941 | Sunk 30 March 1945 |
| U-70 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 November 1940 | Sunk 7 March 1941 |
| U-71 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 December 1940 | Scuttled 2 May 1945 |
| U-72 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 January 1941 | Sunk 30 March 1945 |
| U-73 | Kriegsmarine | Type VIIB | U-boat | 843 | 30 September 1940 | Sunk 16 December 1943 |
| U-74 | Kriegsmarine | Type VIIB | U-boat | 843 | 31 October 1940 | Sunk 2 May 1942 |
| U-75 | Kriegsmarine | Type VIIB | U-boat | 843 | 19 December 1940 | Sunk 28 December 1941 |
| U-76 | Kriegsmarine | Type VIIB | U-boat | 843 | 9 December 1940 | Sunk 5 April 1941 |
| U-77 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 January 1941 | Scuttled 29 March 1943 |
| U-78 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 February 1941 | Sunk 16 April 1945 |
| U-79 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1941 | Sunk 23 December 1941 |
| U-80 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 April 1941 | Sunk 28 November 1944 |
| U-81 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 April 1941 | Sunk 9 January 1944, raised 22 April 1944 and scrapped |
| U-82 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 May 1941 | Sunk 6 February 1942 |
| U-83 | Kriegsmarine | Type VIIB | U-boat | 843 | 8 February 1941 | Sunk 4 March 1943 |
| U-84 | Kriegsmarine | Type VIIB | U-boat | 843 | 29 April 1941 | Sunk 7 August 1943 |
| U-85 | Kriegsmarine | Type VIIB | U-boat | 843 | 7 June 1941 | Sunk 14 April 1942 |
| U-86 | Kriegsmarine | Type VIIB | U-boat | 843 | 8 July 1941 | Sunk 29 November 1943 |
| U-87 | Kriegsmarine | Type VIIB | U-boat | 843 | 19 August 1941 | Sunk 4 March 1943 |
| U-88 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 October 1941 | Sunk 12 September 1942 |
| U-89 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 November 1941 | Sunk 12 May 1943 |
| U-90 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 December 1941 | Sunk 24 July 1942 |
| U-91 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 January 1942 | Sunk 26 February 1944 |
| U-92 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 March 1942 | Decommissioned 12 October 1944, scrapped 1944–1945 |
| U-93 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 July 1940 | Sunk 15 January 1942 |
| U-94 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 August 1940 | Sunk 28 August 1942 |
| U-95 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 August 1940 | Sunk 28 November 1941 |
| U-96 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 September 1940 | Sunk 30 March 1945 |
| U-97 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 September 1940 | Sunk 16 June 1943 |
| U-98 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 October 1940 | Sunk 15 November 1942 |
| U-99 | Kriegsmarine | Type VIIB | U-boat | 843 | 18 April 1940 | Scuttled 17 March 1941 |
| U-100 | Kriegsmarine | Type VIIB | U-boat | 843 | 30 May 1940 | Sunk 17 March 1941 |
| U-101 | Kriegsmarine | Type VIIB | U-boat | 843 | 11 March 1940 | Scuttled 3 May 1945 |
| U-102 | Kriegsmarine | Type VIIB | U-boat | 843 | 27 April 1940 | Sunk 1 July 1940 |
| U-103 | Kriegsmarine | Type IXB | U-boat | 1,159 | 5 July 1940 | Scuttled 3 May 1945 |
| U-104 | Kriegsmarine | Type IXB | U-boat | 1,159 | 19 August 1940 | Missing 28 November 1940 |
| U-105 | Kriegsmarine | Type IXB | U-boat | 1,159 | 10 September 1940 | Sunk 2 June 1943 |
| U-106 | Kriegsmarine | Type IXB | U-boat | 1,159 | 24 September 1940 | Sunk 2 August 1943 |
| U-107 | Kriegsmarine | Type IXB | U-boat | 1,159 | 8 October 1940 | Sunk 18 August 1944 |
| U-108 | Kriegsmarine | Type IXB | U-boat | 1,159 | 22 October 1940 | Sunk 11 April 1944 |
| U-109 | Kriegsmarine | Type IXB | U-boat | 1,159 | 5 December 1940 | Sunk 4 May 1943 |
| U-110 | Kriegsmarine | Type IXB | U-boat | 1,159 | 21 November 1940 | Captured by British destroyer 9 May 1941, sunk 10 May 1941 |
| U-111 | Kriegsmarine | Type IXB | U-boat | 1,159 | 19 December 1940 | Sunk 4 October 1941 |
| U-116 | Kriegsmarine | Type XB | minelayer U-boat | 2,143 | 26 July 1941 | Lost 6 October 1942 |
| U-117 | Kriegsmarine | Type XB | minelayer U-boat | 2,143 | 25 October 1941 | Sunk 7 August 1943 |
| U-118 | Kriegsmarine | Type XB | minelayer U-boat | 2,143 | 6 December 1941 | Sunk 12 June 1943 |
| U-119 | Kriegsmarine | Type XB | minelayer U-boat | 2,143 | 2 April 1942 | Sunk 24 June 1943 |
| U-120 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 20 April 1940 | Scuttled 5 May 1945, raised and scrapped 1950 |
| U-121 | Kriegsmarine | Type IIB | coastal U-boat | 323 | 28 May 1940 | Scuttled 5 May 1945, raised and scrapped 1950 |
| U-122 | Kriegsmarine | Type IXB | U-boat | 1,159 | 30 March 1940 | Missing 22 June 1940 |
| U-123 | Kriegsmarine | Type IXB | U-boat | 1,159 | 30 May 1940 | Scuttled 19 August 1944, raised and repaired by France as Blaison post-war, decommissioned 18 August 1959 |
| U-124 | Kriegsmarine | Type IXB | U-boat | 1,159 | 11 June 1940 | Sunk 2 April 1943 |
| U-125 | Kriegsmarine | Type IXC | U-boat | 1,232 | 3 March 1941 | Sunk 6 May 1943 |
| U-126 | Kriegsmarine | Type IXC | U-boat | 1,232 | 22 March 1941 | Sunk 3 July 1943 |
| U-127 | Kriegsmarine | Type IXC | U-boat | 1,232 | 24 April 1941 | Sunk 15 December 1941 |
| U-128 | Kriegsmarine | Type IXC | U-boat | 1,232 | 12 May 1941 | Sunk 17 May 1943 |
| U-129 | Kriegsmarine | Type IXC | U-boat | 1,232 | 21 May 1941 | Scuttled 18 August 1944; refloated and scrapped 1946 |
| U-130 | Kriegsmarine | Type IXC | U-boat | 1,232 | 11 June 1941 | Sunk 12 March 1943 |
| U-131 | Kriegsmarine | Type IXC | U-boat | 1,232 | 1 July 1941 | Scuttled 17 December 1941 |
| U-132 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 May 1941 | Sunk 4 November 1942 |
| U-133 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 July 1941 | Sunk 14 March 1942 |
| U-134 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 July 1941 | Sunk 26 July 1941 |
| U-135 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 August 1941 | Sunk 15 July 1943 |
| U-136 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 August 1941 | Sunk 11 July 1942 |
| U-137 | Kriegsmarine | Type IID | coastal U-boat | 364 | 15 June 1940 | Scuttled 5 May 1945 |
| U-138 | Kriegsmarine | Type IID | coastal U-boat | 364 | 27 June 1940 | Scuttled 18 June 1941 |
| U-139 | Kriegsmarine | Type IID | coastal U-boat | 364 | 24 July 1940 | Scuttled 5 May 1945 |
| U-140 | Kriegsmarine | Type IID | coastal U-boat | 364 | 7 August 1940 | Scuttled 5 May 1945 |
| U-141 | Kriegsmarine | Type IID | coastal U-boat | 364 | 21 August 1940 | Scuttled 5 May 1945 |
| U-142 | Kriegsmarine | Type IID | coastal U-boat | 364 | 4 September 1940 | Scuttled 5 May 1945 |
| U-143 | Kriegsmarine | Type IID | coastal U-boat | 364 | 18 September 1940 | Surrendered 5 May 1945; scuttled 22 December 1945 |
| U-144 | Kriegsmarine | Type IID | coastal U-boat | 364 | 2 October 1940 | Sunk 10 August 1941 |
| U-145 | Kriegsmarine | Type IID | coastal U-boat | 364 | 16 October 1940 | Surrendered 5 May 1945; scuttled 22 December 1945 |
| U-146 | Kriegsmarine | Type IID | coastal U-boat | 364 | 30 October 1940 | Scuttled 5 May 1945 |
| U-147 | Kriegsmarine | Type IID | coastal U-boat | 364 | 16 November 1940 | Sunk 2 June 1941 |
| U-148 | Kriegsmarine | Type IID | coastal U-boat | 364 | 28 December 1940 | Scuttled 5 May 1945 |
| U-149 | Kriegsmarine | Type IID | coastal U-boat | 364 | 13 November 1940 | Surrendered 5 May 1945; scuttled 21 December 1945 |
| U-150 | Kriegsmarine | Type IID | coastal U-boat | 364 | 27 November 1940 | Surrendered 5 May 1945; scuttled 21 December 1945 |
| U-151 | Kriegsmarine | Type IID | coastal U-boat | 364 | 15 January 1941 | Scuttled 5 May 1945 |
| U-152 | Kriegsmarine | Type IID | coastal U-boat | 364 | 29 January 1941 | Scuttled 5 May 1945 |
| U-153 | Kriegsmarine | Type IXC | U-boat | 1,232 | 19 July 1941 | Sunk 13 July 1942 |
| U-154 | Kriegsmarine | Type IXC | U-boat | 1,232 | 2 August 1941 | Sunk 3 July 1944 |
| U-155 | Kriegsmarine | Type IXC | U-boat | 1,232 | 23 August 1941 | Surrendered 5 May 1945; scuttled 21 December 1945 |
| U-156 | Kriegsmarine | Type IXC | U-boat | 1,232 | 4 September 1941 | Sunk 8 March 1943 |
| U-157 | Kriegsmarine | Type IXC | U-boat | 1,232 | 15 September 1941 | Sunk 13 June 1942 |
| U-158 | Kriegsmarine | Type IXC | U-boat | 1,232 | 25 September 1941 | Sunk 30 June 1942 |
| U-159 | Kriegsmarine | Type IXC | U-boat | 1,232 | 4 October 1941 | Sunk 28 July 1943 |
| U-160 | Kriegsmarine | Type IXC | U-boat | 1,232 | 16 October 1941 | Sunk 14 July 1943 |
| U-161 | Kriegsmarine | Type IXC | U-boat | 1,232 | 8 July 1941 | Sunk 27 September 1943 |
| U-162 | Kriegsmarine | Type IXC | U-boat | 1,232 | 9 September 1941 | Sunk 3 September 1942 |
| U-163 | Kriegsmarine | Type IXC | U-boat | 1,232 | 21 October 1941 | Sunk 13 March 1943 |
| U-164 | Kriegsmarine | Type IXC | U-boat | 1,232 | 28 November 1941 | Sunk 6 January 1943 |
| U-165 | Kriegsmarine | Type IXC | U-boat | 1,232 | 3 February 1942 | Sunk 27 September 1942 |
| U-166 | Kriegsmarine | Type IXC | U-boat | 1,232 | 23 March 1942 | Sunk 30 July 1942 |
| U-167 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 4 July 1942 | Scuttled 6 April 1943 |
| U-168 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 September 1942 | Sunk 6 October 1944 |
| U-169 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 16 November 1942 | Sunk 27 March 1943 |
| U-170 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 January 1943 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-171 | Kriegsmarine | Type IXC | U-boat | 1,232 | 25 October 1941 | Sunk 9 October 1942 |
| U-172 | Kriegsmarine | Type IXC | U-boat | 1,232 | 5 November 1941 | Sunk 13 December 1943 |
| U-173 | Kriegsmarine | Type IXC | U-boat | 1,232 | 15 November 1941 | Sunk 16 November 1942 |
| U-174 | Kriegsmarine | Type IXC | U-boat | 1,232 | 26 November 1941 | Sunk 27 April 1943 |
| U-175 | Kriegsmarine | Type IXC | U-boat | 1,232 | 5 December 1941 | Sunk 17 April 1943 |
| U-176 | Kriegsmarine | Type IXC | U-boat | 1,232 | 15 December 1941 | Sunk 15 May 1943 |
| U-177 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 14 March 1942 | Sunk 6 February 1944 |
| U-178 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 14 February 1942 | Scuttled 25 August 1944 |
| U-179 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 7 March 1942 | Sunk 8 October 1942 |
| U-180 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 16 May 1942 | Sunk 23 August 1944 |
| U-181 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 9 May 1942 | Seized by Japan 6 May 1945; commissioned as I-501; surrendered August 1945; scuttled 12 February 1946 |
| U-182 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 30 June 1942 | Sunk 16 May 1943 |
| U-183 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 1 April 1942 | Sunk 23 April 1945 |
| U-184 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 29 May 1942 | Missing after 21 November 1942 |
| U-185 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 13 June 1942 | Sunk 24 August 1943 |
| U-186 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 July 1942 | Sunk 12 May 1943 |
| U-187 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 23 July 1942 | Sunk 4 February 1943 |
| U-188 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 5 August 1942 | Scuttled 25 August 1944; refloated and scrapped 1947 |
| U-189 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 15 August 1942 | Sunk 23 April 1943 |
| U-190 | Kriegsmarine Royal Canadian Navy | Type IXC/40 | U-boat | 1,257 | 24 September 1942 | Surrendered to Royal Canadian Navy (RCN) 11 May 1945; commissioned in RCN 19 May 1945; paid off 24 July 1947; scuttled 21 October 1947 |
| U-191 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 20 October 1942 | Sunk 23 April 1943 |
| U-192 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 16 November 1942 | Sunk 6 May 1943 |
| U-193 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 December 1942 | Missing after 24 April 1944 |
| U-194 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 8 January 1943 | Sunk 24 June 1943 |
| U-195 | Kriegsmarine | Type IXD1 | U-boat | 1,771 | 5 September 1942 | Seized by Japan 5 May 1945; commissioned as I-506; surrendered August 1945; scuttled 15 February 1946; refloated and scrapped 1947 |
| U-196 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 11 September 1942 | Missing after 12 December 1944 |
| U-197 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 10 October 1942 | Sunk 20 August 1943 |
| U-198 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 3 November 1942 | Sunk 12 August 1944 |
| U-199 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 28 November 1942 | Sunk 31 July 1943 |
| U-200 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 22 December 1942 | Sunk 24 June 1943 |
| U-201 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 January 1941 | Sunk 17 February 1943 |
| U-202 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 March 1941 | Sunk 2 June 1943 |
| U-203 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 February 1941 | Sunk 25 April 1943 |
| U-204 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 March 1941 | Sunk 19 October 1941 |
| U-205 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 May 1941 | Sunk 17 February 1943 |
| U-206 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 May 1941 | Missing after ca. 30 November 1941 |
| U-207 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 June 1941 | Sunk 11 September 1941 |
| U-208 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 July 1941 | Sunk 7 December 1941 |
| U-209 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 October 1941 | Missing after 7 May 1943 |
| U-210 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 February 1942 | Sunk 6 August 1942 |
| U-211 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 March 1942 | Sunk 19 November 1943 |
| U-212 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 April 1942 | Sunk 21 July 1944 |
| U-213 | Kriegsmarine | Type VIID | U-boat | 1,060 | 30 August 1941 | Sunk 31 July 1942 |
| U-214 | Kriegsmarine | Type VIID | U-boat | 1,060 | 1 November 1941 | Sunk 26 July 1944 |
| U-215 | Kriegsmarine | Type VIID | U-boat | 1,060 | 22 November 1941 | Sunk 3 July 1942 |
| U-216 | Kriegsmarine | Type VIID | U-boat | 1,060 | 15 December 1941 | Sunk 20 October 1942 |
| U-217 | Kriegsmarine | Type VIID | U-boat | 1,060 | 31 January 1942 | Sunk 5 June 1943 |
| U-218 | Kriegsmarine | Type VIID | U-boat | 1,060 | 24 January 1942 | Surrendered 12 May 1945; scuttled 4 December 1945 |
| U-219 | Kriegsmarine | Type XB | U-boat minelayer | 2,143 | 12 December 1942 | Seized by Japan 5 May 1945; commissioned as I-505; surrendered August 1945; scuttled 3 February 1946 |
| U-220 | Kriegsmarine | Type XB | U-boat minelayer | 2,143 | 27 March 1943 | Sunk 28 October 1943 |
| U-221 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 May 1942 | Sunk 27 September 1943 |
| U-222 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 May 1942 | Sunk in collision 2 September 1942 |
| U-223 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 June 1942 | Sunk 30 March 1944 |
| U-224 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 June 1942 | Sunk 13 January 1943 |
| U-225 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 July 1942 | Sunk 22 February 1943 |
| U-226 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 August 1942 | Sunk 6 November 1943 |
| U-227 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 August 1942 | Sunk 30 April 1943 |
| U-228 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 September 1942 | Stricken 5 October 1944; scrapped |
| U-229 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 October 1942 | Sunk 22 September 1943 |
| U-230 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 October 1942 | Scuttled 21 August 1944 |
| U-231 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 November 1942 | Sunk 13 January 1944 |
| U-232 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 November 1942 | Sunk 9 July 1943 |
| U-233 | Kriegsmarine | Type XB | U-boat minelayer | 2,143 | 22 September 1943 | Sunk 5 July 1944 |
| U-234 | Kriegsmarine | Type XB | U-boat minelayer | 2,143 | 2 March 1944 | Surrendered 14 May 1945; sunk as target 20 November 1947 |
| U-235 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 December 1942 | Sunk 14 April 1945 |
| U-236 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 January 1943 | Scuttled 5 May 1945 |
| U-237 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 January 1943 | Sunk 4 April 1945 |
| U-238 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 February 1943 | Sunk 9 February 1944 |
| U-239 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1943 | Scrapped 1944 |
| U-240 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 April 1943 | Missing after 15 May 1944 |
| U-241 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 July 1943 | Sunk 18 May 1944 |
| U-242 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 August 1943 | Sunk 5 April 1945 |
| U-243 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 October 1943 | Sunk 8 July 1944 |
| U-244 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 October 1943 | Surrendered 14 May 1945; sank under tow the same day |
| U-244 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1943 | Surrendered 9 May 1945; scuttled 7 December 1945 |
| U-245 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1943 | Surrendered 9 May 1945; scuttled 7 December 1945 |
| U-246 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 January 1944 | Sunk 17 March 1945 |
| U-247 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 October 1943 | Sunk 1 September 1944 |
| U-248 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 November 1943 | Sunk 16 January 1945 |
| U-249 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 November 1943 | Surrendered 10 May 1945: scuttled 13 December 1945 |
| U-250 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 December 1943 | Sunk 30 July 1944; refloated by Soviet Union; in Soviet Navy as TS-14; scrapped |
| U-251 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 September 1941 | Sunk 19 April 1945 |
| U-252 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 October 1941 | Sunk 14 April 1942 |
| U-253 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1941 | Sunk 25 September 1942 |
| U-254 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 November 1941 | Sunk in collision 8 December 1942 |
| U-255 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 November 1941 | Surrendered 17 May 1945; scuttled 13 December 1945 |
| U-256 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1941 | Captured May 1945; scrapped |
| U-257 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 January 1942 | Sunk 24 February 1944 |
| U-258 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 February 1942 | Sunk 20 May 1943 |
| U-259 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 February 1942 | Sunk 15 November 1942 |
| U-260 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 March 1942 | Scuttled 12 March 1945 |
| U-261 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 March 1942 | Sunk 15 September 1942 |
| U-262 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 March 1942 | Stricken 2 April 1945; scrapped 1947 |
| U-263 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 May 1942 | Sank in diving accident 20 January 1944 |
| U-264 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 May 1942 | Sunk 19 February 1944 |
| U-265 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 June 1942 | Sunk 3 February 1943 |
| U-266 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 June 1942 | Sunk 15 May 1943 |
| U-267 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 July 1942 | Scuttled 5 May 1945; refloated and scrapped |
| U-268 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 July 1942 | Sunk 19 February 1943 |
| U-269 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 August 1942 | Sunk 25 June 1944 |
| U-270 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 September 1942 | Sunk 13 August 1944 |
| U-271 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 September 1942 | Sunk 28 January 1944 |
| U-272 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 October 1942 | Sunk in collision 12 November 1942 |
| U-273 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1942 | Sunk 19 May 1943 |
| U-274 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 November 1942 | Sunk 23 October 1943 |
| U-275 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 November 1942 | Sunk 10 March 1945 |
| U-276 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 December 1942 | Stricken 29 September 1944; sunk 3 May 1945 |
| U-277 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 December 1942 | Sunk 1 May 1944 |
| U-278 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 January 1943 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-279 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 February 1943 | Sunk 4 October 1943 |
| U-280 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 February 1943 | Sunk 16 November 1943 |
| U-281 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 February 1943 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-282 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1943 | Sunk 29 October 1943 |
| U-283 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 March 1943 | Sunk 11 February 1944 |
| U-284 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 April 1943 | Scuttled 21 December 1943 |
| U-285 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 May 1943 | Sunk 15 April 1945 |
| U-286 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 June 1943 | Sunk 29 April 1945 |
| U-287 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 September 1943 | Scuttled 16 May 1945 |
| U-288 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 June 1943 | Sunk 3 April 1944 |
| U-289 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 July 1943 | Sunk 31 May 1944 |
| U-290 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 July 1943 | Scuttled 5 May 1945 |
| U-291 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 August 1943 | Surrendered 5 May 1945; scuttled 20 December 1945 |
| U-292 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 25 August 1943 | Sunk 27 May 1944 |
| U-293 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 8 September 1943 | Surrendered 11 May 1945; scuttled 13 December 1945 |
| U-294 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 4 October 1943 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-295 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 20 October 1943 | Surrendered 9 May 1945; scuttled 17 December 1945 |
| U-296 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 3 November 1943 | Missing March 1945 |
| U-297 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 November 1943 | Sunk 6 December 1944 |
| U-298 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 1 December 1943 | Surrendered 9 May 1945; scuttled 29 November 1945 |
| U-299 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 15 December 1943 | Surrendered 9 May 1945; scuttled 4 December 1945 |
| U-300 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 29 December 1943 | Sunk 22 February 1945 |
| U-301 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 May 1942 | Sunk 21 January 1943 |
| U-302 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 June 1942 | Sunk 6 April 1944 |
| U-303 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 July 1942 | Sunk 21 May 1943 |
| U-304 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 August 1942 | Sunk 28 May 1943 |
| U-305 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 September 1942 | Sunk 16 January 1944 |
| U-306 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1942 | Sunk 31 October 1943 |
| U-307 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 November 1942 | Sunk 29 April 1945 |
| U-308 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1942 | Sunk 4 June 1943 |
| U-309 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 January 1943 | Sunk 16 February 1945 |
| U-310 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 February 1943 | Surrendered 9 May 1945; Scrapped March 1947 |
| U-311 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 March 1943 | Sunk 22 April 1944 |
| U-312 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 April 1943 | Surrendered 9 May 1945; scuttled 29 November 1945 |
| U-313 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 May 1943 | Surrendered 9 May 1945; scuttled 27 December 1945 |
| U-314 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 June 1943 | Sunk 30 January 1944 |
| U-315 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 July 1943 | Surrendered 9 May 1945; Scrapped March 1947 |
| U-316 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 August 1943 | Scuttled 2 May 1945 |
| U-317 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 23 October 1943 | Sunk 26 June 1944 |
| U-318 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 13 November 1943 | Surrendered 9 May 1945; scuttled 21 December 1945 |
| U-319 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 4 December 1943 | Sunk 15 July 1944 |
| U-320 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 30 December 1943 | Scuttled 8 May 1945 |
| U-321 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 20 January 1944 | Sunk 2 April 1945 |
| U-322 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 5 February 1944 | Sunk 29 December 1944 |
| U-323 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 2 March 1944 | Scuttled 5 May 1945 |
| U-324 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 5 April 1944 | Surrendered 9 May 1945; Scrapped 1947 |
| U-325 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 May 1944 | Sunk 30 April 1945 |
| U-326 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 June 1944 | Sunk 30 April 1945 |
| U-327 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 18 July 1944 | Sunk 3 February 1945 |
| U-328 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 19 September 1944 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-331 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 March 1941 | Sunk 17 November 1942 |
| U-332 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 June 1941 | Sunk 29 April 1943 |
| U-333 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 August 1941 | Sunk 31 July 1944 |
| U-334 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 October 1941 | Sunk 14 June 1943 |
| U-335 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 December 1941 | Sunk 3 August 1942 |
| U-336 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 February 1942 | Sunk 5 October 1943 |
| U-337 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 May 1942 | Missing after 3 January 1943 |
| U-338 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 June 1942 | Sunk 20 September 1943 |
| U-339 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 August 1942 | Scuttled 5 May 1945 |
| U-340 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 October 1942 | Sunk 2 November 1943 |
| U-341 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 November 1942 | Sunk 19 September 1943 |
| U-342 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 January 1943 | Sunk 17 April 1944 |
| U-343 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 February 1943 | Sunk 10 March 1944 |
| U-344 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 March 1943 | Sunk 22 August 1944 |
| U-345 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 May 1943 | Decommissioned 23 December 1943; surrendered May 1945; sunk December 1945 |
| U-346 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 June 1943 | Sank in diving accident 20 September 1943 |
| U-347 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 July 1943 | Sunk 17 July 1944 |
| U-348 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 August 1943 | Sunk 30 March 1945 |
| U-349 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 September 1943 | Scuttled 5 May 1945; scrapped 1948 |
| U-350 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 October 1943 | Sunk 30 March 1945 |
| U-351 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 June 1941 | Scuttled 5 May 1945; scrapped 1948 |
| U-352 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 August 1941 | Sunk 9 May 1942 |
| U-353 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 March 1942 | Sunk 16 October 1942 |
| U-354 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 April 1942 | Sunk 24 August 1944 |
| U-355 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 October 1941 | Missing after 1 April 1944 |
| U-356 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 December 1941 | Sunk 27 December 1942 |
| U-357 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 June 1942 | Sunk 26 December 1942 |
| U-358 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 August 1942 | Sunk 1 March 1944 |
| U-359 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 October 1942 | Sunk 26 July 1943 |
| U-360 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 November 1942 | Sunk 2 April 1944 |
| U-361 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1942 | Sunk 17 July 1944 |
| U-362 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 February 1943 | Sunk 5 September 1944 |
| U-363 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 March 1943 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-364 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 May 1943 | Sunk 29 January 1944 |
| U-365 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 June 1943 | Sunk 13 December 1944 |
| U-366 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 July 1943 | Sunk 5 March 1944 |
| U-367 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 August 1943 | Sunk 15 March 1945 |
| U-368 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 January 1944 | Surrendered 5 May 1945; scuttled 17 December 1945 |
| U-369 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 October 1943 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-370 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 October 1943 | Scuttled 5 May 1945 |
| U-371 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 March 1941 | Sunk 4 May 1944 |
| U-372 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 April 1941 | Sunk 4 August 1942 |
| U-373 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 May 1941 | Sunk 8 June 1944 |
| U-374 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 June 1941 | Sunk 12 January 1942 |
| U-375 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 July 1941 | Missing after 25 July 1943 |
| U-376 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 August 1941 | Missing after 7 April 1943 |
| U-377 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 August 1941 | Sunk 17 January 1944 |
| U-378 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 October 1941 | Sunk 20 October 1943 |
| U-379 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 November 1941 | Sunk 8 August 1942 |
| U-380 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 December 1941 | Sunk 11 March 1944 |
| U-381 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 February 1942 | Missing after 10 May 1943 |
| U-382 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 April 1942 | Scuttled 5 May 1945 |
| U-383 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 June 1942 | Sunk 1 August 1943 |
| U-384 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 July 1942 | Sunk 19 March 1943 |
| U-385 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 August 1942 | Sunk 11 August 1944 |
| U-386 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 October 1942 | Sunk 19 February 1944 |
| U-387 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 November 1942 | Sunk 9 December 1944 |
| U-388 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 December 1942 | Sunk 20 June 1943 |
| U-389 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 February 1943 | Sunk 4 October 1943 |
| U-390 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1943 | Sunk 5 July 1944 |
| U-391 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 April 1943 | Sunk 13 December 1943 |
| U-392 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 May 1943 | Sunk 16 March 1944 |
| U-393 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 July 1943 | Scuttled 5 May 1945 |
| U-394 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 August 1943 | Sunk 2 September 1944 |
| U-396 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 October 1943 | Missing after 11 April 1945 |
| U-397 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 November 1943 | Scuttled 5 May 1945 |
| U-398 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 December 1943 | Missing after 17 April 1945 |
| U-399 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 January 1944 | Sunk 26 March 1945 |
| U-400 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 March 1944 | Sunk 15 December 1944 |
| U-401 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 April 1941 | Sunk 3 August 1941 |
| U-402 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 May 1941 | Sunk 13 October 1943 |
| U-403 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 June 1941 | Sunk 18 August 1943 |
| U-404 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 August 1941 | Sunk 28 July 1943 |
| U-405 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 September 1941 | Sunk 1 November 1943 |
| U-406 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 October 1941 | Sunk 18 February 1944 |
| U-407 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1941 | Sunk 19 September 1944 |
| U-408 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 November 1941 | Sunk 5 November 1942 |
| U-409 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 January 1942 | Sunk 12 July 1943 |
| U-410 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 February 1942 | Sunk 11 March 1944 |
| U-411 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 March 1942 | Sunk 13 November 1942 |
| U-412 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 April 1942 | Sunk 22 October 1942 |
| U-413 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 June 1942 | Sunk 20 August 1944 |
| U-414 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 July 1942 | Sunk 25 May 1943 |
| U-415 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 August 1942 | Sunk 14 July 1944 |
| U-416 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 November 1942 | Sunk in collision 12 December 1944 |
| U-417 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 September 1942 | Sunk 11 June 1943 |
| U-418 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1942 | Sunk 30 May 1943 |
| U-419 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 November 1942 | Sunk 8 October 1943 |
| U-420 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 December 1942 | Missing after 20 October 1943 |
| U-421 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 January 1943 | Sunk 29 April 1944 |
| U-422 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 February 1943 | Sunk 4 October 1943 |
| U-423 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 March 1943 | Sunk 17 June 1944 |
| U-424 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 April 1943 | Sunk 11 February 1944 |
| U-425 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 April 1943 | Sunk 17 February 1945 |
| U-426 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 May 1943 | Sunk 8 January 1944 |
| U-427 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 June 1943 | Surrendered 9 May 1945; scuttled 21 December 1945 |
| U-428 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 June 1943 | Scuttled 5 May 1945; scrapped 1946 |
| U-429 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 July 1943 | Destroyed in dock 30 March 1945 |
| U-430 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 August 1943 | Sunk 30 March 1945 |
| U-431 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 April 1941 | Sunk 21 October 1943 |
| U-432 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 April 1941 | Sunk 11 March 1943 |
| U-433 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 May 1941 | Sunk 16 November 1941 |
| U-434 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 June 1941 | Sunk 18 December 1941 |
| U-435 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 August 1941 | Sunk 9 July 1943 |
| U-436 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 September 1941 | Sunk 26 May 1943 |
| U-437 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 October 1941 | Stricken 5 October 1944; scrapped 1946 |
| U-438 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 November 1941 | Sunk 6 May 1943 |
| U-439 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 December 1941 | Sunk 4 May 1943 |
| U-440 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 January 1942 | Sunk 31 May 1943 |
| U-441 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 February 1942 | Sunk 30 June 1944 |
| U-442 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 March 1942 | Sunk 12 February 1943 |
| U-443 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 April 1942 | Sunk 23 February 1943 |
| U-444 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 May 1942 | Sunk 11 March 1943 |
| U-445 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 May 1942 | Sunk 24 August 1944 |
| U-446 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 June 1942 | Scuttled 3 May 1945; scrapped 1947 |
| U-447 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 July 1942 | Sunk 7 May 1943 |
| U-448 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 August 1942 | Sunk 14 April 1944 |
| U-449 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 August 1942 | Sunk 24 June 1943 |
| U-450 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 September 1942 | Sunk 10 March 1944 |
| U-451 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 May 1941 | Sunk 21 December 1941 |
| U-452 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 May 1941 | Sunk 25 August 1941 |
| U-453 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 June 1941 | Sunk 21 May 1944 |
| U-454 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 July 1941 | Sunk 1 August 1943 |
| U-455 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 August 1941 | Sunk 5 April 1944 |
| U-456 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 September 1941 | Sunk 12 May 1943 |
| U-457 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 November 1941 | Sunk 16 September 1942 |
| U-458 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 December 1941 | Sunk 22 August 1943 |
| U-459 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 15 November 1941 | Scuttled 24 July 1943 |
| U-460 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 24 December 1941 | Sunk 4 October 1943 |
| U-461 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 30 January 1942 | Sunk 30 July 1943 |
| U-462 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 5 March 1942 | Sunk 30 July 1943 |
| U-463 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 2 April 1942 | Sunk 16 May 1943 |
| U-464 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 30 April 1942 | Sunk 20 August 1942 |
| U-465 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 May 1942 | Sunk 2 May 1943 |
| U-466 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 June 1942 | Scuttled 19 August 1944 |
| U-467 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 July 1942 | Sunk 25 May 1943 |
| U-468 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 August 1942 | Sunk 11 August 1943 |
| U-469 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 October 1942 | Sunk 25 March 1943 |
| U-470 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 January 1943 | Sunk 16 October 1943 |
| U-471 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 May 1943 | Sunk 6 August 1944 |
| U-472 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 May 1943 | Sunk 4 March 1944 |
| U-473 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 June 1943 | Sunk 6 May 1944 |
| U-475 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 July 1943 | Scuttled 3 May 1945; scrapped 1947 |
| U-476 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 July 1943 | Scuttled 25 May 1944 |
| U-477 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 August 1943 | Sunk 3 June 1944 |
| U-478 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 September 1943 | Sunk 30 June 1944 |
| U-479 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 October 1943 | Sunk 27 November 1944 |
| U-480 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 October 1943 | Sunk sometime between 29 January and 20 February 1945 |
| U-481 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 November 1943 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-482 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 December 1943 | Sunk 25 November 1944 |
| U-483 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 December 1943 | Surrendered 9 May 1945; scuttled 16 December 1945 |
| U-484 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 January 1944 | Sunk 9 September 1944 |
| U-485 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 February 1944 | Surrendered 12 May 1945; scuttled 8 December 1945 |
| U-486 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 March 1944 | Sunk 12 April 1945 |
| U-487 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 21 December 1942 | Sunk 13 July 1943 |
| U-488 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 1 February 1943 | Sunk 26 April 1944 |
| U-489 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 8 March 1943 | Sunk 4 August 1943 |
| U-490 | Kriegsmarine | Type XIV | supply U-boat | 1,932 | 27 March 1943 | Sunk 12 June 1944 |
| U-501 | Kriegsmarine | Type IXC | U-boat | 1,232 | 30 April 1941 | Sunk 10 September 1941 |
| U-502 | Kriegsmarine | Type IXC | U-boat | 1,232 | 31 May 1941 | Sunk 6 July 1942 |
| U-503 | Kriegsmarine | Type IXC | U-boat | 1,232 | 10 July 1941 | Sunk 10 July 1941 |
| U-504 | Kriegsmarine | Type IXC | U-boat | 1,232 | 30 July 1941 | Sunk 30 July 1943 |
| U-505 | Kriegsmarine | Type IXC | U-boat | 1,232 | 30 July 1941 | Captured by U.S. Navy 4 June 1944; museum ship 25 September 1954 |
| U-506 | Kriegsmarine | Type IXC | U-boat | 1,232 | 15 September 1941 | Sunk 12 July 1943 |
| U-507 | Kriegsmarine | Type IXC | U-boat | 1,232 | 8 October 1941 | Sunk on 13 January 1943 |
| U-508 | Kriegsmarine | Type IXC | U-boat | 1,232 | 20 October 1941 | Sunk 12 November 1943 |
| U-509 | Kriegsmarine | Type IXC | U-boat | 1,232 | 4 November 1941 | Sunk 15 July 1943 |
| U-510 | Kriegsmarine | Type IXC | U-boat | 1,232 | 25 November 1941 | Surrendered to U.S. Navy 10 May 1945; transferred to French Navy as Bouan 1946; scrapped 1960 |
| U-511 | Kriegsmarine | Type IXC | U-boat | 1,232 | 8 December 1941 | Sold to Japan as Ro-500 16 September 1943; surrendered August 1945; scuttled 30 April 1946 |
| U-512 | Kriegsmarine | Type IXC | U-boat | 1,232 | 20 December 1941 | Sunk 2 October 1942 |
| U-513 | Kriegsmarine | Type IXC | U-boat | 1,232 | 10 January 1942 | Sunk 8 July 1943 |
| U-514 | Kriegsmarine | Type IXC | U-boat | 1,232 | 24 January 1942 | Sunk 19 July 1943 |
| U-515 | Kriegsmarine | Type IXC | U-boat | 1,232 | 21 February 1942 | Sunk 9 April 1944 |
| U-516 | Kriegsmarine | Type IXC | U-boat | 1,232 | 21 February 1942 | Surrendered 14 May 1945; scuttled 2 January 1946 |
| U-517 | Kriegsmarine | Type IXC | U-boat | 1,232 | 21 March 1942 | Sunk 21 November 1942 |
| U-518 | Kriegsmarine | Type IXC | U-boat | 1,232 | 25 April 1942 | Sunk 22 April 1945 |
| U-519 | Kriegsmarine | Type IXC | U-boat | 1,232 | 7 May 1942 | Missing after 31 January 1943 |
| U-520 | Kriegsmarine | Type IXC | U-boat | 1,232 | 19 May 1942 | Sunk 30 October 1942 |
| U-521 | Kriegsmarine | Type IXC | U-boat | 1,232 | 3 June 1942 | Sunk 2 June 1943 |
| U-522 | Kriegsmarine | Type IXC | U-boat | 1,232 | 11 June 1942 | Sunk 23 February 1943 |
| U-523 | Kriegsmarine | Type IXC | U-boat | 1,232 | 25 June 1942 | Sunk 25 August 1943 |
| U-524 | Kriegsmarine | Type IXC | U-boat | 1,232 | 8 July 1942 | Sunk 22 March 1943 |
| U-525 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 30 July 1942 | Sunk 11 August 1943 |
| U-526 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 12 August 1942 | Sunk 14 April 1943 |
| U-527 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 2 September 1942 | Sunk 23 July 1943 |
| U-528 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 16 September 1942 | Sunk 11 May 1943 |
| U-529 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 30 September 1942 | Sunk 15 February 1943 |
| U-530 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 14 October 1942 | Surrendered 10 July 1945; sunk as target 28 November 1947 |
| U-531 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 28 October 1942 | Sunk 6 May 1943 |
| U-532 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 11 November 1942 | Surrendered 13 May 1945; scuttled 9 December 1945 |
| U-533 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 25 November 1942 | Sunk 16 October 1943 |
| U-534 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 23 December 1942 | Sunk 5 May 1945; refloated 23 August 1993; museum ship 10 February 2009 |
| U-535 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 23 December 1942 | Sunk 5 July 1943 |
| U-536 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 13 January 1943 | Sunk 20 November 1943 |
| U-537 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 27 January 1943 | Sunk 10 November 1944 |
| U-538 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 February 1943 | Sunk 21 November 1943 |
| U-539 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 February 1943 | Surrendered 9 May 1945; sank under tow 4 December 1945 |
| U-540 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 March 1943 | Sunk 17 October 1943 |
| U-541 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 March 1943 | Surrendered 12 May 1945; scuttled 5 January 1946 |
| U-542 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 7 April 1943 | Sunk 28 November 1943 |
| U-543 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 21 April 1943 | Sunk 2 July 1944 |
| U-544 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 5 May 1943 | Sunk 16 January 1944 |
| U-545 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 May 1943 | Scuttled 10 February 1944 |
| U-546 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 3 June 1943 | Sunk 24 April 1945 |
| U-547 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 16 June 1943 | Mine damage 11 August 1944; decommissioned; possibly scuttled 31 December 1944 |
| U-548 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 30 June 1943 | Sunk 19 April 1945 |
| U-549 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 14 July 1943 | Sunk 29 May 1944 |
| U-550 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 28 July 1943 | Sunk 16 April 1944 |
| U-551 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 November 1940 | Sunk 23 March 1941 |
| U-552 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 December 1940 | Scuttled 5 May 1945 |
| U-553 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1940 | Missing after 20 January 1943 |
| U-554 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 January 1941 | Scuttled 5 May 1945 |
| U-555 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 January 1941 | Surrendered 3 May 1945; scrapped 1946 |
| U-556 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 February 1941 | Sunk 27 June 1941 |
| U-557 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 February 1941 | Sunk 16 December 1941 |
| U-558 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 February 1941 | Sunk 20 July 1943 |
| U-559 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 February 1941 | Sunk 30 October 1942 |
| U-560 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 March 1941 | Scuttled 3 May 1945 |
| U-561 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1941 | Sunk 12 July 1943 |
| U-562 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 March 1941 | Sunk 19 February 1943 |
| U-563 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 March 1941 | Sunk 31 May 1943 |
| U-564 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 April 1941 | Sunk 14 June 1943 |
| U-565 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 April 1941 | Scuttled 30 September 1944 |
| U-566 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 April 1941 | Scuttled 24 October 1943 |
| U-567 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 April 1941 | Sunk 21 December 1941 |
| U-568 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 May 1941 | Sunk 28 May 1942 |
| U-569 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 May 1941 | Sunk 22 May 1943 |
| U-570 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 May 1941 | Captured by Royal Canadian Navy 27 August 1941; commissioned in Royal Navy as HMS Graph; wrecked while under tow 20 March 1944;scrapped 1961 |
| U-571 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 May 1941 | Sunk 28 January 1944 |
| U-572 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 May 1941 | Sunk 3 August 1943 |
| U-573 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 June 1941 | Interned 2 May 1942; sold to Spain as G-7 2 August 1942; decommissioned 2 May 1970; scrapped |
| U-574 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 June 1941 | Sunk 19 December 1941 |
| U-575 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 June 1941 | Sunk 13 March 1944 |
| U-576 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 June 1941 | Sunk 15 July 1942 |
| U-577 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 July 1941 | Sunk 15 January 1942 |
| U-578 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 July 1941 | Missing after 6 August 1942 |
| U-579 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 July 1941 | Sunk 5 May 1945 |
| U-580 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 July 1941 | Sunk in collision 11 November 1941 |
| U-581 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 July 1941 | Sunk 2 February 1942 |
| U-582 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 August 1941 | Sunk 5 October 1942 |
| U-583 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 August 1941 | Sunk in collision 15 November 1941 |
| U-584 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 August 1941 | Sunk 31 October 1943 |
| U-585 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 August 1941 | Sunk 30 March 1942 |
| U-586 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 September 1941 | Sunk 5 July 1944 |
| U-587 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 September 1941 | Sunk 27 March 1942 |
| U-588 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 September 1941 | Sunk 31 July 1942 |
| U-589 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 September 1941 | Sunk 14 September 1942 |
| U-590 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 October 1941 | Sunk 9 July 1943 |
| U-591 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 October 1941 | Sunk 30 July 1943 |
| U-592 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 October 1941 | Sunk 31 January 1944 |
| U-593 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 October 1941 | Sunk 13 December 1943 |
| U-594 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 October 1941 | Sunk 5 June 1943 |
| U-595 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 November 1941 | Sunk 14 November 1942 |
| U-596 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 November 1941 | Scuttled 30 September 1944 |
| U-597 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 November 1941 | Sunk 12 October 1942 |
| U-598 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 November 1941 | Sunk 23 July 1943 |
| U-599 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 December 1941 | Sunk 24 October 1942 |
| U-600 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 December 1941 | Sunk 25 November 1943 |
| U-601 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 December 1941 | Sunk 25 February 1944 |
| U-602 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 December 1941 | Missing after 19 April 1943 |
| U-603 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 January 1942 | Missing after 19 February 1944 |
| U-604 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 January 1942 | Scuttled 11 August 1943 |
| U-605 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 January 1942 | Sunk 14 November 1942 |
| U-606 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 January 1942 | Sunk 22 February 1943 |
| U-607 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 January 1942 | Sunk 13 July 1943 |
| U-608 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 February 1942 | Scuttled 10 August 1944 |
| U-609 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 February 1942 | Sunk 6 February 1943 |
| U-610 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 February 1942 | Sunk 8 October 1943 |
| U-611 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 February 1942 | Sunk 8 December 1942 |
| U-612 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 March 1942 | Scuttled 1 May 1945 |
| U-613 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 March 1942 | Sunk 23 July 1943 |
| U-614 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 March 1942 | Sunk 29 July 1943 |
| U-615 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 March 1942 | Sunk 7 August 1943 |
| U-616 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 April 1942 | Sunk 17 May 1944 |
| U-617 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 April 1942 | Wrecked 12 September 1943 |
| U-618 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 April 1942 | Sunk 14 August 1944 |
| U-619 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 April 1942 | Sunk 5 October 1942 |
| U-620 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 April 1942 | Sunk 13 February 1943 |
| U-621 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 May 1942 | Sunk 18 August 1944 |
| U-622 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 May 1942 | Sunk 24 July 1943 |
| U-623 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 May 1942 | Sunk 21 February 1943 |
| U-624 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 May 1942 | Sunk 7 February 1943 |
| U-625 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 June 1942 | Sunk 10 March 1944 |
| U-626 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 June 1942 | Sunk 15 December 1942 |
| U-627 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 June 1942 | Sunk 27 October 1942 |
| U-628 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 June 1942 | Sunk 3 July 1943 |
| U-629 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 July 1942 | Sunk 7 June 1944 |
| U-630 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 July 1942 | Sunk 6 May 1943 |
| U-631 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 July 1942 | Sunk 17 October 1943 |
| U-632 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 July 1942 | Sunk 6 April 1943 |
| U-633 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 July 1942 | Sunk 8 March 1943 |
| U-634 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 August 1942 | Sunk 30 August 1943 |
| U-635 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 August 1942 | Sunk 5 April 1943 |
| U-636 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 August 1942 | Sunk 21 April 1945 |
| U-637 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 August 1942 | Surrendered 9 May 1945; scuttled 21 December 1945 |
| U-638 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 September 1942 | Sunk 5 May 1943 |
| U-639 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 September 1942 | Sunk 28 August 1943 |
| U-640 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 September 1942 | Sunk 14 May 1943 |
| U-641 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 September 1942 | Sunk 19 January 1944 |
| U-642 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 October 1942 | Sunk 5 July 1944 |
| U-643 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 October 1942 | Scuttled 8 October 1943 |
| U-644 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 October 1942 | Sunk 7 April 1943 |
| U-645 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 October 1942 | Missing after 12 December 1943 |
| U-646 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 October 1942 | Sunk 17 May 1943 |
| U-647 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 November 1942 | Missing after 28 July 1943 |
| U-648 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 November 1942 | Missing after 22 November 1943 |
| U-649 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 November 1942 | Sunk in collision 24 February 1943 |
| U-650 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 November 1942 | Sunk 7 January 1945 |
| U-651 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 February 1941 | Sunk 29 June 1941 |
| U-652 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 April 1941 | Scuttled 2 June 1942 |
| U-653 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 May 1941 | Sunk 15 March 1944 |
| U-654 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 July 1941 | Sunk 22 August 1942 |
| U-655 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 August 1941 | Sunk 24 March 1942 |
| U-656 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 September 1941 | Sunk 1 March 1942 |
| U-657 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 October 1941 | Sunk 17 May 1943 |
| U-658 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 November 1941 | Sunk 30 October 1942 |
| U-659 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 December 1941 | Sunk 4 May 1943 |
| U-660 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 January 1942 | Sunk 12 November 1942 |
| U-661 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 February 1942 | Sunk 15 October 1942 |
| U-662 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 April 1942 | Sunk 21 July 1943 |
| U-663 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 May 1942 | Sunk 8 May 1943 |
| U-664 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 June 1942 | Sunk 9 August 1943 |
| U-665 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 July 1942 | Missing after 22 March 1943 |
| U-666 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 August 1942 | Sunk 10 February 1944 |
| U-667 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1942 | Sunk 26 August 1944 |
| U-668 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 November 1942 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-669 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 December 1942 | Missing after 30 August 1943 |
| U-670 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 January 1943 | Sunk in collision 20 August 1943 |
| U-671 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 March 1943 | Sunk 4 August 1944 |
| U-672 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 April 1943 | Scuttled 18 July 1944 |
| U-673 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 May 1943 | Beached after collision 24 October 1944; scrapped 1946 |
| U-674 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 June 1943 | Sunk 2 May 1944 |
| U-675 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 July 1943 | Sunk 24 May 1944 |
| U-676 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 August 1943 | Sunk 12 February 1945 |
| U-677 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 September 1943 | Sunk 9 April 1945 |
| U-678 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 October 1943 | Sunk 6 July 1944 |
| U-679 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 November 1943 | Sunk 9 January 1945 |
| U-680 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1943 | Surrendered 5 May 1945; scuttled 28 December 1945 |
| U-681 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 February 1944 | Sunk 11 March 1945 |
| U-682 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 April 1944 | Destroyed in shipyard 11 March 1945 |
| U-683 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 May 1944 | Missing after 3 April 1945 |
| U-701 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 July 1941 | Sunk 7 July 1942 |
| U-702 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 September 1941 | Sunk 31 March 1942 |
| U-703 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 October 1941 | Missing after 16 September 1944 |
| U-704 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 November 1941 | Scuttled 30 April 1945 |
| U-705 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 December 1941 | Sunk 3 September 1942 |
| U-706 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 March 1942 | Sunk 2 August 1943 |
| U-707 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 July 1942 | Sunk 9 November 1943 |
| U-708 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 July 1942 | Scuttled 5 May 1945 |
| U-709 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 August 1942 | Sunk 1 March 1944 |
| U-710 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 September 1942 | Sunk 24 April 1943 |
| U-711 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 September 1942 | Sunk 4 May 1945 |
| U-712 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 November 1942 | Surrendered 9 May 1945; scrapped 1950 |
| U-713 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 December 1942 | Missing after 24 February 1944 |
| U-714 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 February 1943 | Sunk 14 March 1945 |
| U-715 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 March 1943 | Sunk 3 June 1944 |
| U-716 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 April 1943 | Surrendered 9 May 1945; scuttled 11 December 1945 |
| U-717 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 May 1943 | Scuttled 5 May 1945 |
| U-718 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 June 1943 | Sunk in collision 18 November 1943 |
| U-719 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 July 1943 | Sunk 26 June 1944 |
| U-720 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 September 1943 | Surrendered 5 May 1945; scuttled 21 December 1945 |
| U-721 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 November 1943 | Scuttled 5 May 1945 |
| U-722 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 December 1943 | Sunk 27 March 1945 |
| U-731 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 October 1942 | Sunk 5 May 1945 |
| U-732 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 October 1942 | Scuttled 31 October 1943 |
| U-733 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 December 1943 | Scuttled 5 May 1945 |
| U-734 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 December 1942 | Sunk 9 February 1944 |
| U-735 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 December 1942 | Sunk 28 December 1944 |
| U-736 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 January 1943 | Sunk 6 August 1944 |
| U-737 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 January 1943 | Sunk 19 December 1944 |
| U-738 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 February 1943 | Sunk 14 February 1944 |
| U-739 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 March 1943 | Surrendered 13 May 1945; scuttled 16 December 1945 |
| U-740 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 March 1943 | Sunk 8 June 1944 |
| U-741 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 April 1943 | Sunk 15 August 1944 |
| U-742 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 May 1943 | Sunk 18 July 1944 |
| U-743 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 May 1943 | Missing after 22 August 1944 |
| U-744 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 June 1943 | Captured and scuttled 6 March 1944 |
| U-745 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 June 1943 | Sunk 31 January 1945 |
| U-746 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 July 1943 | Scuttled 5 May 1945 |
| U-747 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 July 1943 | Scuttled 5 May 1945 |
| U-748 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 July 1943 | Scuttled 5 May 1945 |
| U-749 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 August 1943 | Sunk 4 April 1945 |
| U-750 | Kriegsmarine | Type VIIC | U-boat | 857 | 26 August 1943 | Scuttled 5 May 1945 |
| U-751 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 January 1941 | Sunk 17 July 1942 |
| U-752 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 May 1941 | Scuttled 23 May 1943 |
| U-753 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 June 1941 | Sunk 13 May 1943 |
| U-754 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 August 1941 | Sunk 31 July 1942 |
| U-755 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 November 1941 | Sunk 28 May 1943 |
| U-756 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 December 1941 | Sunk 1 September 1942 |
| U-757 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 February 1942 | Sunk 8 January 1944 |
| U-758 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 May 1942 | Surrendered May 1945; scrapped 1946 or 1947 |
| U-759 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 August 1942 | Sunk 15 July 1943 |
| U-760 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 October 1942 | Interned 8 September 1943; scuttled 13 December 1945 |
| U-761 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 December 1942 | Scuttled 24 February 1944 |
| U-762 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 January 1943 | Sunk 8 February 1944 |
| U-763 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 March 1943 | Scuttled 29 January 1945 |
| U-764 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 May 1943 | Surrendered 14 May 1945; scuttled 2 February 1946 |
| U-765 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 June 1943 | Sunk 6 May 1944 |
| U-766 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 July 1943 | Surrendered 8 May 1945; transferred to French Navy as Laubie 8 May 1945; scrapped 1963 |
| U-767 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 September 1943 | Sunk 18 June 1944 |
| U-768 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 October 1943 | Sunk in collision 20 November 1943 |
| U-771 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 November 1943 | Sunk 11 November 1944 |
| U-772 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1943 | Sunk 17 December 1944 |
| U-773 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 January 1944 | Surrendered 9 May 1945; scuttled 8 December 1945 |
| U-774 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 February 1944 | Sunk 8 April 1945 |
| U-775 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 March 1944 | Surrendered 9 May 1945; scuttled 8 December 1945 |
| U-776 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 April 1944 | Surrendered 16 May 1945; sank under tow 3 December 1945 |
| U-777 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 November 1944 | Scuttled 5 May 1945 |
| U-778 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 July 1944 | Surrendered 9 May 1945; scuttled 4 December 1945 |
| U-779 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 August 1944 | Surrendered 5 May 1945; scuttled 17 December 1945 |
| U-792 | Kriegsmarine | Type XVIIA | coastal U-boat | 304 | 16 November 1943 | Scuttled 4 May 1945 |
| U-793 | Kriegsmarine | Type XVIIA | coastal U-boat | 304 | 24 April 1944 | Scuttled 4 May 1945 |
| U-794 | Kriegsmarine | Type XVIIA | coastal U-boat | 304 | 14 November 1943 | Scuttled 5 May 1945; scrapped |
| U-795 | Kriegsmarine | Type XVIIA | coastal U-boat | 304 | 22 February 1945 | Scuttled 3 May 1945; scrapped |
| U-801 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 March 1943 | Scuttled 17 March 1944 |
| U-802 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 12 June 1943 | Surrendered 11 May 1945; scuttled 31 December 1945 |
| U-803 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 7 September 1943 | Sunk 27 April 1944 |
| U-804 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 4 December 1943 | Sunk 9 April 1945 |
| U-805 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 12 February 1944 | Surrendered 15 May 1945; scuttled 4 February 1946 |
| U-806 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 29 April 1944 | Surrendered 6 May 1945; scuttled 21 December 1945 |
| U-821 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 October 1943 | Sunk 10 June 1944 |
| U-822 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 July 1944 | Scuttled 5 May 1945 |
| U-825 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 May 1944 | Surrendered 13 May 1945; scuttled 3 January 1946 |
| U-826 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 May 1944 | Surrendered 11 May 1945; scuttled 1 December 1945 |
| U-827 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 25 May 1944 | Scuttled 5 May 1945; scrapped 1948 |
| U-828 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 June 1944 | Scuttled 5 May 1945 |
| U-841 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 6 February 1943 | Scuttled 17 October 1943 |
| U-842 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 1 March 1943 | Sunk 6 November 1943 |
| U-843 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 March 1943 | Sunk 9 April 1945 |
| U-844 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 7 April 1943 | Sunk 16 October 1943 |
| U-845 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 1 May 1943 | Sunk 10 March 1944 |
| U-846 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 29 May 1943 | Sunk 4 May 1944 |
| U-847 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 23 January 1943 | Sunk 27 August 1943 |
| U-848 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 20 February 1943 | Sunk 5 November 1943 |
| U-849 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 11 March 1943 | Sunk 25 November 1943 |
| U-850 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 17 April 1943 | Sunk 20 December 1943 |
| U-851 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 21 May 1943 | Missing after 27 March 1944 |
| U-852 | Kriegsmarine | Type IXD2 | U-boat | 1,776 | 15 June 1943 | Scuttled 3 May 1944 |
| U-853 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 25 June 1943 | Sunk 6 May 1945 |
| U-854 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 July 1943 | Sunk 4 February 1944 |
| U-855 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 2 August 1943 | Missing after 11 September 1944 |
| U-856 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 August 1943 | Scuttled 7 April 1944 |
| U-857 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 16 September 1943 | Missing after 30 April 1945 |
| U-858 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 30 September 1943 | Surrendered 14 May 1945; scuttled 21 November 1947 |
| U-859 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 8 July 1943 | Sunk 23 September 1944 |
| U-860 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 12 August 1943 | Sunk 15 June 1944 |
| U-861 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 2 September 1943 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-862 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 7 October 1943 | Seized by Japan 5 May 1945; commissioned as I-502; surrendered August 1945; scuttled 15 February 1946 |
| U-863 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 3 November 1943 | Sunk 29 September 1944 |
| U-864 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 9 December 1943 | Sunk 9 February 1945 |
| U-865 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 25 October 1943 | Missing after 9 September 1944 |
| U-866 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 17 November 1943 | Sunk 18 March 1945 |
| U-867 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 12 December 1943 | Scuttled 19 September 1944 |
| U-868 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 23 December 1943 | Surrendered 9 May 1945; scuttled 30 November 1945 |
| U-869 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 26 January 1944 | Sunk 11 February 1945 |
| U-870 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 3 February 1944 | Sunk 30 March 1945 |
| U-871 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 15 January 1944 | Sunk 26 September 1944 |
| U-872 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 10 February 1944 | Decommissioned 10 August 1944; scrapped |
| U-873 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 1 March 1944 | Surrendered 16 May 1945; scrapped March 1948 |
| U-874 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 8 April 1944 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-875 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 21 April 1944 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-876 | Kriegsmarine | Type IXD2 | U-boat | 1,771 | 24 May 1944 | Scuttled 3 May 1945 |
| U-877 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 March 1944 | Sunk 27 December 1944 |
| U-878 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 14 April 1944 | Sunk 10 April 1945 |
| U-879 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 April 1944 | Sunk 30 April 1945 |
| U-880 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 11 May 1944 | Sunk 16 April 1945 |
| U-881 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 27 May 1944 | Sunk 6 May 1945 |
| U-883 | Kriegsmarine | Type IXD/42 | U-boat | 1,776 | 27 March 1945 | Surrendered 5 May 1945; scuttled 31 December 1945 |
| U-889 | Kriegsmarine Royal Canadian Navy | Type IXC/40 | U-boat | 1,257 | 4 August 1944 | Surrendered to Royal Canadian Navy 10 May 1945, commissioned by RCN 14 May 1 945, paid off December 1945, scuttled 1947 |
| U-901 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 April 1944 | Surrendered 15 May 1945; scuttled 5 January 1946 |
| U-903 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 September 1943 | Scuttled 5 May 1945 |
| U-904 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 September 1943 | Scuttled 4 May 1945 |
| U-905 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 March 1944 | Sunk 27 March 1945 |
| U-907 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 May 1944 | Surrendered 9 May 1945; scuttled 7 December 1945 |
| U-921 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 May 1943 | Missing after 24 September 1944 |
| U-922 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 August 1943 | Scuttled 3 May 1945 |
| U-923 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 October 1943 | Sunk 9 February 1945 |
| U-924 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 November 1943 | Scuttled 3 May 1945 |
| U-925 | Kriegsmarine | Type VIIC | U-boat | 857 | 30 December 1943 | Missing after 25 August 1944 |
| U-926 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 February 1944 | Surrendered 9 May 1945; transferred to Norway as Kya 10 January 1949; retired 1962 |
| U-927 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 February 1944 | Sunk 24 February 1945 |
| U-928 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 July 1944 | Surrendered 9 May 1945; scuttled 16 December 1945 |
| U-929 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 September 1944 | Scuttled 1 May 1945 |
| U-930 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 December 1944 | Surrendered 9 May 1945; scuttled 29 December 1945 |
| U-951 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 December 1942 | Sunk 7 July 1943 |
| U-952 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 December 1942 | Decommissioned 12 July 1944; scrapped 1946 |
| U-953 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 December 1942 | Surrendered 9 May 1945; scrapped 1950 |
| U-954 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1942 | Sunk 19 May 1943 |
| U-955 | Kriegsmarine | Type VIIC | U-boat | 857 | 31 December 1942 | Sunk 7 June 1944 |
| U-956 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 January 1943 | Surrendered 13 May 1945; scuttled 17 December 1945 |
| U-957 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 January 1943 | Decommissioned 21 October 1944; probably scuttled May 1945 |
| U-958 | Kriegsmarine | Type VIIC | U-boat | 857 | 14 January 1943 | Scuttled 3 May 1945 |
| U-959 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 January 1943 | Sunk 2 May 1944 |
| U-960 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 January 1943 | Sunk 19 May 1944 |
| U-961 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 February 1943 | Sunk 29 March 1944 |
| U-962 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 February 1943 | Sunk 8 April 1944 |
| U-963 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 February 1943 | Scuttled 20 May 1945 |
| U-964 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 February 1943 | Sunk 16 October 1943 |
| U-965 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 February 1943 | Sunk 30 March 1945 |
| U-966 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 March 1943 | Scuttled 10 November 1943 |
| U-967 | Kriegsmarine | Type VIIC | U-boat | 857 | 11 March 1943 | Scuttled 19 August 1944 |
| U-968 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 March 1943 | Surrendered 9 May 1945; scuttled 29 November 1945 |
| U-969 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 March 1943 | Sunk 6 August 1944 |
| U-970 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 March 1943 | Sunk 8 June 1944 |
| U-971 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 April 1943 | Sunk 24 June 1944 |
| U-972 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 April 1943 | Missing after 15 December 1943 |
| U-973 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 April 1943 | Sunk 6 March 1944 |
| U-974 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 April 1943 | Sunk 19 April 1944 |
| U-975 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 April 1943 | Surrendered 9 May 1945; scuttled 10 February 1946 |
| U-976 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 May 1943 | Sunk 25 March 1944 |
| U-977 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 May 1943 | Surrendered 17 August 1945; sunk as target 13 November 1946 |
| U-978 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 May 1943 | Surrendered 9 May 1945; scuttled 11 December 1945 |
| U-979 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 May 1943 | Scuttled 24 May 1945 |
| U-980 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 May 1943 | Sunk 11 June 1944 |
| U-981 | Kriegsmarine | Type VIIC | U-boat | 857 | 3 June 1943 | Sunk 12 August 1944 |
| U-982 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 June 1943 | Destroyed in shipyard 9 April 1945 |
| U-983 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 June 1943 | Sunk 8 September 1943 |
| U-984 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 June 1943 | Sunk ca. 2 August 1944 |
| U-985 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 June 1943 | Decommissioned 15 November 1944; captured 1945; scrapped |
| U-986 | Kriegsmarine | Type VIIC | U-boat | 857 | 1 July 1943 | Missing after 10 April 1944 |
| U-987 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 July 1943 | Sunk 15 June 1944 |
| U-988 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 July 1943 | Sunk 22 June 1944 |
| U-989 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 July 1943 | Sunk 14 February 1945 |
| U-990 | Kriegsmarine | Type VIIC | U-boat | 857 | 28 July 1943 | Sunk 25 May 1944 |
| U-991 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 July 1943 | Surrendered 9 May 1945; scuttled 11 December 1945 |
| U-992 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 August 1943 | Surrendered 9 May 1945; scuttled 16 December 1945 |
| U-993 | Kriegsmarine | Type VIIC | U-boat | 857 | 19 August 1943 | Sunk 4 October 1944 |
| U-994 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 September 1943 | Surrendered 9 May 1945; scuttled 5 December 1945 |
| U-995 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 16 September 1943 | Surrendered 9 May 1945; to Norway October 1948; commissioned as Kaura 1 December 1952; stricken 1965; museum ship October 1971 |
| U-997 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 23 September 1943 | Surrendered 9 May 1945; scuttled 13 December 1945 |
| U-998 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 27 June 1944 | Scrapped 1944 |
| U-999 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 21 October 1943 | Scuttled 5 May 1945 |
| U-1000 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 4 November 1943 | Decommissioned 29 September 1944; scrapped 1945 |
| U-1001 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 18 November 1943 | Sunk 8 April 1945 |
| U-1002 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 30 November 1943 | Surrendered 9 May 1945; scuttled 13 December 1945 |
| U-1003 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 9 December 1943 | Scuttled 23 March 1945 |
| U-1004 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 16 December 1943 | Surrendered 9 May 1945; scuttled 1 December 1945 |
| U-1005 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 30 December 1943 | Surrendered 14 May 1945; sank under tow 5 December 1945 |
| U-1006 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 11 January 1944 | Sunk 16 October 1944 |
| U-1007 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 18 January 1944 | Scuttled 2 May 1945 |
| U-1008 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 1 February 1944 | Scuttled 6 May 1945 |
| U-1009 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 10 February 1944 | Surrendered 10 May 1945; scuttled 16 December 1945 |
| U-1010 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 22 February 1944 | Surrendered 14 May 1945; scuttled 7 January 1946 |
| U-1013 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 2 March 1944 | Sunk 4 February 1945 |
| U-1014 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 14 March 1944 | Sunk 4 February 1945 |
| U-1015 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 23 March 1944 | Sunk in collision 19 May 1944 |
| U-1016 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 4 April 1944 | Scuttled 5 May 1945 |
| U-1017 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 13 April 1944 | Sunk 29 April 1945 |
| U-1018 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 24 April 1944 | Sunk 27 February 1945 |
| U-1019 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 4 May 1944 | Surrendered 9 May 1945; scuttled 7 December 1945 |
| U-1020 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 May 1944 | Sunk 9 January 1945 |
| U-1021 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 25 May 1944 | Sunk 14 March 1945 |
| U-1022 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 7 June 1944 | Surrendered 9 May 1945; scuttled 29 December 1945 |
| U-1023 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 15 June 1944 | Surrendered 10 May 1945; scuttled 7 January 1946 |
| U-1024 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 28 June 1944 | Captured 12 April 1945; sank under tow 13 April 1945 |
| U-1025 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 12 April 1945 | Scuttled 5 May 1945 |
| U-1051 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 March 1944 | Sunk 26 January 1945 |
| U-1052 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 January 1944 | Surrendered 9 May 1945; Sunk as target 9 December 1945 |
| U-1053 | Kriegsmarine | Type VIIC | U-boat | 857 | 12 February 1944 | Sank in diving accident 15 February 1945 |
| U-1054 | Kriegsmarine | Type VIIC | U-boat | 857 | 25 March 1944 | Scrapped May 1945 |
| U-1055 | Kriegsmarine | Type VIIC | U-boat | 857 | 8 April 1944 | Missing after 23 April 1945 |
| U-1056 | Kriegsmarine | Type VIIC | U-boat | 857 | 29 April 1944 | Scuttled 5 May 1945 |
| U-1057 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 May 1944 | Surrendered 9 May 1945; to United Kingdom as N22 1945; to Soviet Union 4 December 1945; renamed S-81 9 June 1949; sunk as target 24 September 1957; stricken 16 October 1957; scrapped |
| U-1058 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 June 1944 | Surrendered 10 May 1945; to United Kingdom as N23 1945; to Soviet Union 4 December 1945; renamed S-82 9 June 1949; stricken 25 March 1957; apparently sunk as target |
| U-1059 | Kriegsmarine | Type VIIF | torpedo transport U-boat | 1,162 | 1 May 1943 | Sunk 19 March 1944 |
| U-1060 | Kriegsmarine | Type VIIF | torpedo transport U-boat | 1,162 | 15 May 1943 | Wrecked 27 October 1944 |
| U-1061 | Kriegsmarine | Type VIIF | torpedo transport U-boat | 1,162 | 25 August 1943 | Surrendered May 1945; scuttled 1 December 1945 |
| U-1062 | Kriegsmarine | Type VIIF | torpedo transport U-boat | 1,162 | 19 June 1943 | Sunk 30 September 1944 |
| U-1063 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 8 July 1944 | Sunk 15 April 1945 |
| U-1064 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 29 July 1944 | Surrendered 9 May 1945; to Soviet Union as S-83; retired 12 March 1974; scrapped |
| U-1065 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 23 September 1944 | Sunk 9 April 1945 |
| U-1101 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 November 1943 | Scuttled 5 May 1945 |
| U-1102 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 February 1944 | Surrendered 13 May 1945; scuttled 21 December 1945 |
| U-1103 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 8 January 1944 | Surrendered 5 May 1945; scuttled 30 December 1945 |
| U-1104 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 15 March 1944 | Surrendered 9 May 1945; scuttled 1 December 1945 |
| U-1105 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 3 June 1944 | Surrendered 9 May 1945; to United Kingdom as N-16 1945; to United States as U-1105 ca. January 1946; scuttled 19 September 1949 |
| U-1106 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 5 July 1944 | Sunk 29 March 1945 |
| U-1107 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 8 August 1944 | Sunk 30 April 1945 |
| U-1108 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 18 November 1944 | Surrendered 9 May 1945; scrapped May 1949 |
| U-1109 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 18 November 1944 | Surrendered 12 May 1945; sunk as target 6 January 1946 |
| U-1110 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 24 September 1944 | Surrendered 14 May 1945; scuttled 21 December 1945 |
| U-1131 | Kriegsmarine | Type VIIC | U-boat | 857 | 20 May 1944 | Sunk 30 March 1945 |
| U-1132 | Kriegsmarine | Type VIIC | U-boat | 857 | 24 June 1944 | Scuttled 5 May 1945 |
| U-1161 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 September 1943 | Scuttled 5 May 1945 |
| U-1162 | Kriegsmarine | Type VIIC | U-boat | 857 | 15 September 1943 | Scuttled 5 May 1945 |
| U-1163 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 October 1943 | Surrendered 29 May 1945; scuttled 11 December 1945 |
| U-1164 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 27 October 1943 | Sunk 24 July 1944; refloated and scrapped |
| U-1165 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 November 1943 | Surrendered 9 May 1945; scuttled 30 December 1945 |
| U-1166 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 28 August 1944 | Scuttled 3 May 1945 |
| U-1167 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 29 December 1943 | Sunk 30 March 1945 |
| U-1168 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 19 January 1944 | Scuttled 4 May 1945 |
| U-1169 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 9 February 1944 | Sunk 29 March 1945 |
| U-1170 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 1 March 1944 | Scuttled 2 May 1945 |
| U-1171 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 22 March 1944 | Surrendered 9 May 1945; to United Kingdom as N19; scrapped April 1949 |
| U-1172 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 20 April 1944 | Sunk 27 January 1945 |
| U-1191 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 September 1943 | Sunk 3 July 1944 |
| U-1192 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 September 1943 | Scuttled 3 May 1945 |
| U-1193 | Kriegsmarine | Type VIIC | U-boat | 857 | 7 October 1943 | Scuttled 5 May 1945 |
| U-1194 | Kriegsmarine | Type VIIC | U-boat | 857 | 21 October 1943 | Surrendered 9 May 1945; scuttled 22 December 1945 |
| U-1195 | Kriegsmarine | Type VIIC | U-boat | 857 | 4 November 1943 | Sunk 6 April 1945 |
| U-1196 | Kriegsmarine | Type VIIC | U-boat | 857 | 18 November 1943 | Scuttled 2 May 1945 |
| U-1197 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 December 1943 | Captured May 1945; scuttled February 1946 |
| U-1198 | Kriegsmarine | Type VIIC | U-boat | 857 | 9 December 1943 | Surrendered 8 May 1945; scuttled 17 December 1945 |
| U-1199 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 December 1943 | Sunk 21 January 1945 |
| U-1200 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 January 1944 | Sunk 11 November 1944 |
| U-1201 | Kriegsmarine | Type VIIC | U-boat | 857 | 5 January 1944 | Scuttled 3 May 1945 |
| U-1202 | Kriegsmarine | Type VIIC | U-boat | 857 | 27 January 1944 | Surrendered 9 May 1945; to Norway 9 May 1945; commissioned as Kinn 1 July 1951; scrapped 1963 |
| U-1203 | Kriegsmarine | Type VIIC | U-boat | 857 | 10 February 1944 | Surrendered 9 May 1945; scuttled 8 December 1945 |
| U-1204 | Kriegsmarine | Type VIIC | U-boat | 857 | 17 February 1944 | Scuttled 3 May 1945 |
| U-1205 | Kriegsmarine | Type VIIC | U-boat | 857 | 2 March 1944 | Scuttled 3 May 1945 |
| U-1206 | Kriegsmarine | Type VIIC | U-boat | 857 | 16 March 1944 | Scuttled 14 April 1945 |
| U-1207 | Kriegsmarine | Type VIIC | U-boat | 857 | 23 March 1944 | Scuttled 5 May 1945 |
| U-1208 | Kriegsmarine | Type VIIC | U-boat | 857 | 6 April 1944 | Sunk 24 February 1945 |
| U-1209 | Kriegsmarine | Type VIIC | U-boat | 857 | 13 April 1944 | Scuttled 18 December 1944 |
| U-1210 | Kriegsmarine | Type VIIC | U-boat | 857 | 22 April 1944 | Sunk 3 May 1945 |
| U-1221 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 11 August 1943 | Sunk 3 April 1945 |
| U-1222 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 1 September 1943 | Sunk 11 July 1944 |
| U-1223 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 6 October 1943 | Scuttled 5 May 1945 |
| U-1224 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 20 October 1943 | To Japan as Ro-501 15 February 1944; sunk 13 May 1944 |
| U-1225 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 10 November 1943 | Sunk 24 June 1944 |
| U-1226 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 24 November 1943 | Missing after 23 October 1944 |
| U-1227 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 8 December 1943 | Scuttled 3 May 1945; refloated and scrapped |
| U-1228 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 22 December 1943 | Surrendered 17 May 1945; sunk as target 5 February 1946 |
| U-1229 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 13 January 1944 | Sunk 20 August 1944 |
| U-1230 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 26 January 1944 | Surrendered 8 May 1945; scuttled 17 December 1945 |
| U-1231 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 9 February 1944 | Surrendered May 1945; to Soviet Union as N-26 5 November 1945; stricken 31 January 1968; scrapped |
| U-1232 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 8 March 1944 | Captured May 1945; sank under tow 4 March 1946 |
| U-1233 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 22 March 1944 | Surrendered May 1945; scuttled 29 December 1945 |
| U-1234 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 19 April 1944 | Scuttled 2 May 1945 |
| U-1235 | Kriegsmarine | Type IXC/40 | U-boat | 1,237 | 17 May 1944 | Sunk 15 April 1945 |
| U-1271 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 12 January 1944 | Surrendered 9 May 1945; scuttled 8 December 1945 |
| U-1272 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 16 February 1944 | Surrendered 10 May 1945; scuttled 8 December 1945 |
| U-1273 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 28 January 1944 | Sunk 17 February 1945 |
| U-1274 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 1 March 1944 | Sunk 16 April 1945 |
| U-1275 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 22 March 1944 | Scuttled 3 May 1945 |
| U-1276 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 April 1944 | Sunk 20 February 1945 |
| U-1277 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 3 May 1944 | Scuttled 3 June 1945 |
| U-1278 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 31 May 1944 | Sunk 17 February 1945 |
| U-1279 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 5 July 1944 | Sunk 27 February 1945 |
| U-1301 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 11 February 1944 | Surrendered 9 May 1945; scuttled 16 December 1945 |
| U-1302 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 25 May 1944 | Sunk 7 March 1945 |
| U-1303 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 5 April 1944 | scuttled 5 May 1945 |
| U-1304 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 6 September 1944 | Surrendered 9 May 1945; scuttled 16 December 1945 |
| U-1305 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 13 September 1944 | Surrendered 10 May 1945; to United Kingdom as N25; to Soviet Union as S-84 5 December 1945; sunk as target 10 October 1957 |
| U-1306 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 20 December 1944 | Scuttled 5 May 1945 |
| U-1307 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 November 1944 | Surrendered 9 May 1945; scuttled 9 December 1945 |
| U-1308 | Kriegsmarine | Type VIIC/41 | U-boat | 846 | 17 January 1945 | Scuttled 2 May 1945 |
| U-1405 | Kriegsmarine | Type XVIIB | coastal U-boat | 332 | 21 December 1944 | Scuttled 4 May 1945; refloated and scrapped |
| U-1406 | Kriegsmarine | Type XVIIB | coastal U-boat | 332 | 8 February 1945 | Scuttled 7 May 1945; refloated and scrapped |
| U-1407 | Kriegsmarine | Type XVIIB | coastal U-boat | 332 | 13 March 1945 | Scuttled 5 May 1945; refloated and rebuilt; commissioned in Royal Navy as HMS Meteorite 1946; retired September 1949; scrapped |
| U-2321 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 12 June 1944 | Surrendered May 1945; scuttled 27 November 1945 |
| U-2322 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 1 July 1944 | Surrendered May 1945; scuttled 27 November 1945 |
| U-2323 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 18 July 1944 | Sunk 26 July 1944 |
| U-2324 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 25 July 1944 | Surrendered May 1945; scuttled 27 November 1945 |
| U-2325 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 3 August 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2326 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 August 1944 | Surrendered 14 May 1945; to United Kingdom as N35; transferred to France 1946; sank in accident 6 December 1946 |
| U-2327 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 19 August 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-2328 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 25 August 1944 | Surrendered 9 May 1945; sank under tow 27 November 1945 |
| U-2329 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 1 September 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2330 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 7 September 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2331 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 12 September 1944 | Sank in diving accident 10 October 1944 |
| U-2332 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 13 November 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2333 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 18 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2334 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 21 September 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2335 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 27 September 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2336 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 30 September 1944 | Surrendered 21 June 1945; scuttled 3 January 1946 |
| U-2337 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 4 October 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2338 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 9 October 1944 | Sunk 4 May 1945 |
| U-2339 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 16 November 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2340 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 16 October 1944 | Sunk 30 March 1945; refloated and scrapped |
| U-2341 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 21 October 1944 | Surrendered 9 May 1945; scuttled 31 December 1945 |
| U-2342 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 November 1944 | Sunk 26 December 1944 |
| U-2343 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 6 November 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2344 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 10 November 1944 | Sunk in collision 18 February 1945; refloated 1956; scrapped 1958 |
| U-2345 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 15 November 1944 | Surrendered 9 May 1945; scuttled 27 November 1945 |
| U-2346 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 20 November 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2347 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 2 December 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2348 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 4 December 1944 | Surrendered 9 May 1945; scrapped April 1949 |
| U-2349 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 December 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2350 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 23 December 1944 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2351 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 30 December 1944 | Surrendered May 1945; scuttled 253 January 1946 |
| U-2352 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2353 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 9 January 1945 | Surrendered 9 May 1945; to United Kingdom as N31; to Soviet Union 5 December 1945; named M-51 9 June 1949; stricken 17 March 1952; scrapped 1963 |
| U-2354 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 January 1945 | Surrendered 9 May 1945; scuttled 22 December 1945 |
| U-2355 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 12 January 1945 | Scuttled 3 May 1945 |
| U-2356 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 12 January 1945 | Surrendered 5 May 1945; scuttled 22 December 1945 |
| U-2357 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 13 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2358 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 17 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2359 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 16 January 1945 | Sunk 2 May 1945 |
| U-2360 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 23 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2361 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 3 February 1945 | Surrendered 9 May 1945; scuttled 27 November 1945 |
| U-2362 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 5 February 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2363 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 5 February 1945 | Surrendered 9 May 1945; scuttled 28 November 1945 |
| U-2364 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 14 February 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2365 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 2 March 1945 | Scuttled 8 May 1945; refloated June 1956; commissioned in German Federal Navy as U-Hai 15 August 1957; sank 14 September 1966; refloated 19 September 1966; scrapped |
| U-2366 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 10 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2367 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 17 March 1945 | Sunk in collision 5 May 1945; refloated August 1956; commissioned in German Federal Navy as U-Hecht 1 October 1957; scrapped 1969 |
| U-2368 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 11 April 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2369 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 18 April 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2371 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 24 April 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2501 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 June 1944 | Scuttled 3 May 1945 |
| U-2502 | Kriegsmarine | Type XXI | U-boat | 2,067 | 19 July 1944 | Surrendered 9 May 1945; scuttled 2 January 1946 |
| U-2503 | Kriegsmarine | Type XXI | U-boat | 2,067 | 1 August 1944 | Scuttled 4 May 1945 |
| U-2504 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 August 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2505 | Kriegsmarine | Type XXI | U-boat | 2,067 | 7 November 1944 | Scuttled 3 May 1945 |
| U-2506 | Kriegsmarine | Type XXI | U-boat | 2,067 | 31 August 1944 | Surrendered 9 May 1945; scuttled 5 January 1946 |
| U-2507 | Kriegsmarine | Type XXI | U-boat | 2,067 | 8 September 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2508 | Kriegsmarine | Type XXI | U-boat | 2,067 | 26 September 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2509 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 September 1944 | Sunk 8 April 1945 |
| U-2510 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 September 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-2511 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 September 1944 | Surrendered 8 May 1945; scuttled 7 January 1946 |
| U-2512 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 October 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2513 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 October 1944 | Surrendered 8 May 1945; sunk as target 7 October 1951 |
| U-2514 | Kriegsmarine | Type XXI | U-boat | 2,067 | 17 October 1944 | Sunk 8 April 1945 |
| U-2515 | Kriegsmarine | Type XXI | U-boat | 2,067 | 19 October 1944 | Sunk 17 January 1945 |
| U-2516 | Kriegsmarine | Type XXI | U-boat | 2,067 | 24 October 1944 | Damaged beyond repair 9 April 1945; scrapped |
| U-2517 | Kriegsmarine | Type XXI | U-boat | 2,067 | 31 October 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2518 | Kriegsmarine | Type XXI | U-boat | 2,067 | 4 November 1944 | Surrendered 8 May 1945; sunk as target 7 October 1951Scuttled 5 May 1945; to France as Roland Morillot 13 February 1946; Sold for scrap 21 May 1969 |
| U-2519 | Kriegsmarine | Type XXI | U-boat | 2,067 | 15 November 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2520 | Kriegsmarine | Type XXI | U-boat | 2,067 | 25 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-2521 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 November 1944 | Sunk 3 May 1945 |
| U-2522 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 November 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2523 | Kriegsmarine | Type XXI | U-boat | 2,067 | 26 December 1944 | Sunk 17 January 1945 |
| U-2524 | Kriegsmarine | Type XXI | U-boat | 2,067 | 16 January 1945 | Scuttled 5 May 1945 |
| U-2525 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 December 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-2526 | Kriegsmarine | Type XXI | U-boat | 2,067 | 15 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-2527 | Kriegsmarine | Type XXI | U-boat | 2,067 | 23 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-2528 | Kriegsmarine | Type XXI | U-boat | 2,067 | 9 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-2529 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 February 1945 | Surrendered 9 May 1945; to United Kingdom as N27; to Soviet Union 4 December 1945; named B-27 9 June 1949; stricken 1 September 1972; scrapped |
| U-2530 | Kriegsmarine | Type XXI | U-boat | 2,067 | 25 November 1944 | Sunk 31 December 1944; refloated; sunk 17 January 1945; refloated; damaged beyond repair 20 February 1945; scrapped |
| U-2531 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-2533 | Kriegsmarine | Type XXI | U-boat | 2,067 | 18 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2534 | Kriegsmarine | Type XXI | U-boat | 2,067 | 17 January 1945 | Scuttled 3 May 1945 |
| U-2535 | Kriegsmarine | Type XXI | U-boat | 2,067 | 28 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2536 | Kriegsmarine | Type XXI | U-boat | 2,067 | 6 February 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2538 | Kriegsmarine | Type XXI | U-boat | 2,067 | 16 February 1945 | Scuttled 8 May 1945; refloated and scrapped |
| U-2539 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 February 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2540 | Kriegsmarine | Type XXI | U-boat | 2,067 | 24 February 1945 | Scuttled 4 May 1945; refloated June 1957; commissioned in German Federal Navy as Wilhelm Bauer 1 September 1960; museum ship 27 April 1984 |
| U-2541 | Kriegsmarine | Type XXI | U-boat | 2,067 | 1 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-2542 | Kriegsmarine | Type XXI | U-boat | 2,067 | 5 March 1945 | Sunk 3 April 1945; refloated and scrapped |
| U-2543 | Kriegsmarine | Type XXI | U-boat | 2,067 | 7 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2544 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 March 1945 | Scuttled 3 May 1945; refloated and scrapped 1952 |
| U-2545 | Kriegsmarine | Type XXI | U-boat | 2,067 | 8 April 1945 | Scuttled 3 May 1945 |
| U-2546 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2548 | Kriegsmarine | Type XXI | U-boat | 2,067 | 9 April 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-2551 | Kriegsmarine | Type XXI | U-boat | 2,067 | 24 April 1945 | Run aground 5 May 1945; wreck destroyed 23 July 1945; scrapped |
| U-2552 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 April 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3001 | Kriegsmarine | Type XXI | U-boat | 2,067 | 20 July 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3002 | Kriegsmarine | Type XXI | U-boat | 2,067 | 6 August 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3003 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 August 1944 | Sunk April 1945 |
| U-3004 | Kriegsmarine | Type XXI | U-boat | 2,067 | 30 August 1944 | Scuttled 2 May 1945 |
| U-3005 | Kriegsmarine | Type XXI | U-boat | 2,067 | 20 September 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3006 | Kriegsmarine | Type XXI | U-boat | 2,067 | 5 October 1944 | Scuttled 1 May 1945; refloated and scrapped |
| U-3007 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 October 1944 | Sunk 24 February 1945; refloated and scrapped |
| U-3008 | Kriegsmarine | Type XXI | U-boat | 2,067 | 19 October 1944 | Surrendered May 1945; sold for scrap 15 September 1955 |
| U-3009 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 November 1944 | Scuttled 1 May 1945; refloated and scrapped |
| U-3010 | Kriegsmarine | Type XXI | U-boat | 2,067 | 11 November 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3011 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3012 | Kriegsmarine | Type XXI | U-boat | 2,067 | 4 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3013 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 November 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3014 | Kriegsmarine | Type XXI | U-boat | 2,067 | 17 December 1944 | Scuttled 3 May 1945 |
| U-3015 | Kriegsmarine | Type XXI | U-boat | 2,067 | 17 December 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-3016 | Kriegsmarine | Type XXI | U-boat | 2,067 | 5 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-3017 | Kriegsmarine | Type XXI | U-boat | 2,067 | 5 January 1945 | Surrendered 9 May 1945; to United Kingdom as N41; scrapped November 1949 |
| U-3018 | Kriegsmarine | Type XXI | U-boat | 2,067 | 7 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-3019 | Kriegsmarine | Type XXI | U-boat | 2,067 | 23 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3020 | Kriegsmarine | Type XXI | U-boat | 2,067 | 23 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3021 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-3022 | Kriegsmarine | Type XXI | U-boat | 2,067 | 25 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3023 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3024 | Kriegsmarine | Type XXI | U-boat | 2,067 | 13 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3025 | Kriegsmarine | Type XXI | U-boat | 2,067 | 20 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3026 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| German submarine U-3027 | Kriegsmarine | Type XXI | U-boat | 2,067 | 25 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3028 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3029 | Kriegsmarine | Type XXI | U-boat | 2,067 | 5 February 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3030 | Kriegsmarine | Type XXI | U-boat | 2,067 | 14 February 1945 | Scuttled 8 May 1945 |
| U-3031 | Kriegsmarine | Type XXI | U-boat | 2,067 | 28 February 1945 | Scuttled 8 May 1945; refloated and scrapped |
| U-3032 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 February 1945 | Sunk 3 May 1945 |
| U-3033 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 February 1945 | Scuttled 4 May 1945; refloated and scrapped |
| U-3034 | Kriegsmarine | Type XXI | U-boat | 2,067 | 31 March 1945 | Scuttled 4 May 1945; refloated and scrapped |
| U-3035 | Kriegsmarine | Type XXI | U-boat | 2,067 | 1 March 1945 | Surrendered 9 May 1945; to United Kingdom as N28; to Soviet Union 14 December 1945; named B-28 9 June 1949; stricken 25 March 1958; scrapped |
| U-3037 | Kriegsmarine | Type XXI | U-boat | 2,067 | 3 March 1945 | Scuttled 3 May 1945 |
| U-3038 | Kriegsmarine | Type XXI | U-boat | 2,067 | 4 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3039 | Kriegsmarine | Type XXI | U-boat | 2,067 | 8 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3040 | Kriegsmarine | Type XXI | U-boat | 2,067 | 8 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3041 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 March 1945 | Surrendered 9 May 1945; to United Kingdom as N29; to Soviet Union 10 December 1945; named B-29 9 June 1949; stricken 25 September 1958; scrapped |
| U-3044 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3501 | Kriegsmarine | Type XXI | U-boat | 2,067 | 29 July 1944 | Scuttled 1 or 5 May 1945; refloated and scrapped |
| U-3502 | Kriegsmarine | Type XXI | U-boat | 2,067 | 19 August 1944 | Decommissioned 3 May 1945; scrapped |
| U-3503 | Kriegsmarine | Type XXI | U-boat | 2,067 | 9 September 1944 | Scuttled 8 May 1945; refloated 1946; scrapped |
| U-3504 | Kriegsmarine | Type XXI | U-boat | 2,067 | 23 September 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3505 | Kriegsmarine | Type XXI | U-boat | 2,067 | 7 October 1944 | Sunk 3 April 1945 |
| U-3506 | Kriegsmarine | Type XXI | U-boat | 2,067 | 16 October 1944 | Scuttled May 1945; wreck buried |
| U-3507 | Kriegsmarine | Type XXI | U-boat | 2,067 | 19 October 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3508 | Kriegsmarine | Type XXI | U-boat | 2,067 | 2 November 1944 | Sunk 4 March 1945; refloated; sunk 30 March 1945 |
| U-3509 | Kriegsmarine | Type XXI | U-boat | 2,067 | 29 January 1945 | Scuttled 3 May 1945 |
| U-3510 | Kriegsmarine | Type XXI | U-boat | 2,067 | 11 November 1944 | Scuttled 5 May 1945; refloated and scrapped |
| U-3511 | Kriegsmarine | Type XXI | U-boat | 2,067 | 18 November 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3512 | Kriegsmarine | Type XXI | U-boat | 2,067 | 27 November 1944 | Sunk 8 April 1945; refloated and scrapped |
| U-3513 | Kriegsmarine | Type XXI | U-boat | 2,067 | 2 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3514 | Kriegsmarine | Type XXI | U-boat | 2,067 | 9 December 1944 | Surrendered 9 May 1945; Scuttled 12 February 1946 |
| U-3515 | Kriegsmarine | Type XXI | U-boat | 2,067 | 14 December 1944 | Surrendered 9 May 1945; to United Kingdom as N30; to Soviet Union 2 February 1946; named B-30 9 June 1949; sold for scrap 30 November 1959 |
| U-3516 | Kriegsmarine | Type XXI | U-boat | 2,067 | 18 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3517 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 December 1944 | Scuttled 2 May 1945; refloated and scrapped |
| U-3518 | Kriegsmarine | Type XXI | U-boat | 2,067 | 29 December 1944 | Scuttled 3 May 1945; refloated and scrapped |
| U-3519 | Kriegsmarine | Type XXI | U-boat | 2,067 | 6 January 1945 | Sunk 2 March 1945 |
| U-3520 | Kriegsmarine | Type XXI | U-boat | 2,067 | 12 January 1945 | Sunk 31 January 1945 |
| U-3521 | Kriegsmarine | Type XXI | U-boat | 2,067 | 14 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-3522 | Kriegsmarine | Type XXI | U-boat | 2,067 | 21 January 1945 | Scuttled 2 May 1945; refloated and scrapped |
| U-3523 | Kriegsmarine | Type XXI | U-boat | 2,067 | 23 January 1945 | Sunk 6 May 1945 |
| U-3524 | Kriegsmarine | Type XXI | U-boat | 2,067 | 26 January 1945 | Scuttled 5 May 1945 |
| U-3525 | Kriegsmarine | Type XXI | U-boat | 2,067 | 31 January 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-3526 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3527 | Kriegsmarine | Type XXI | U-boat | 2,067 | 10 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3528 | Kriegsmarine | Type XXI | U-boat | 2,067 | 18 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3529 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-3530 | Kriegsmarine | Type XXI | U-boat | 2,067 | 22 March 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-4701 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 10 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4702 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 12 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4703 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 21 January 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4704 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 14 March 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4705 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 2 February 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-4705 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 2 February 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-4706 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 7 February 1945 | Surrendered 9 May 1945; transferred to Norway October 1948; stricken 1954; scrapped |
| U-4707 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 2 February 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4709 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 3 March 1945 | Scuttled 4 May 1945; refloated and scrapped |
| U-4710 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 1 May 1945 | Scuttled 5 May 1945; refloated and scrapped |
| U-4711 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 21 March 1945 | Scuttled 4 May 1945; refloated and scrapped |
| U-4712 | Kriegsmarine | Type XXIII | coastal U-boat | 254 | 3 April 1945 | Scuttled 3 May 1945; refloated and scrapped |
| U-D1 | Kriegsmarine | H | training submarine | 434 | 1915 | Scuttled by the Netherlands; captured by Germany 1939; paid off 23 November 1943 |
| Uarsciek | Regia Marina | Adua | coastal submarine | 843 | 4 December 1937 | Sunk 15 December 1942 |
| UB | Kriegsmarine | Grampus | submarine | 2,157 | 24 May 1939 | Former HMS Seal, captured 5 May 1940; commissioned 30 November 1940; scuttled 3 May 1945; refloated and scrapped |
| Uebi Scebeli | Regia Marina | Adua | coastal submarine | 843 | 21 December 1937 | Scuttled 29 June 1940 |
| UF | Kriegsmarine | Aurore | training submarine | 1,150 | 5 November 1942 | Scuttled 1945 |
| UIT-22 | Kriegsmarine | Liuzzi | transport submarine | 1,484 | 22 December 1939 | Formerly Italian submarine Alpino Bagnolini; seized September 1943; renamed UIT-22; sunk 11 March 1944 |
| UIT-23 | Kriegsmarine | Liuzzi | transport submarine | 1,484 | 3 February 1940 | Formerly Italian submarine Reginaldo Giuliani; seized 8 September 1943; sunk 18 February 1944 |
| UIT-24 | Kriegsmarine | Marcello | submarine | 1,313 | 23 September 1939 | Formerly Italian submarine Comandante Cappellini; seized by Japan and transferred to Germany 10 September 1943; seized by Japan 5 May 1945; commissioned as I-503 May 1945; surrendered to United States August 1945; scuttled 16 April 1946 |
| UIT-25 | Kriegsmarine | Marconi | submarine | 1,490 | 15 May 1940 | Formerly Italian submarine Luigi Torelli; seized September 1943; seized by Japan May 1945; renamed I-504; surrendered August 1945; scuttled 12 February 1946 |
| Ula | Royal Norwegian Navy | U | submarine | 730 | 3 April 1943 | Scrapped 1965 |
| Ullswater | Royal Navy | U | submarine | 730 | 2 April 1941 | Commissioned as P31; renamed Ullswater February 1943; renamed Uproar April 1943; sold for scrap 13 February 1946 |
| Ultimatum | Royal Navy | U | submarine | 730 | 29 July 1941 | Sold for scrap 23 December 1949; scrapped 1950 |
| Ultor | Royal Navy | U | submarine | 730 | 31 December 1942 | Scrapped January 1946 |
| Umbra | Royal Navy | U | submarine | 730 | 2 September 1941 | Sold for scrap 9 July 1946 |
| Umpire | Royal Navy | U | submarine | 730 | 10 July 1941 | Sunk in collision 19 July 1941 |
| Una | Royal Navy | U | submarine | 730 | 27 September 1941 | Sold for scrap 11 April 1949 |
| Unbeaten | Royal Navy | U | submarine | 730 | 10 November 1940 | Sunk 11 November 1942 |
| Unbending | Royal Navy | U | submarine | 730 | 5 November 1941 | Sold for scrap 23 December 1949; scrapped May 1950 |
| Unbroken | Royal Navy | U | submarine | 730 | 29 January 1942 | Transferred to Soviet Union as V-2 26 June 1944; returned 1949; scrapped May 1950 |
| Undaunted | Royal Navy | U | submarine | 730 | 30 December 1940 | Sunk 11 May 1941 |
| Undine | Royal Navy | U | submarine | 730 | 21 August 1938 | Scuttled 7 January 1940 |
| Union | Royal Navy | U | submarine | 730 | 22 February 1941 | Sunk 20 July 1941 |
| Unique | Royal Navy | U | submarine | 730 | 27 September 1940 | Missing after 9 October 1942 |
| Unison | Royal Navy | U | submarine | 730 | 19 February 1942 | Transferred to Soviet Union as V-3 26 June 1944; returned 1949; scrapped May 1950 |
| United | Royal Navy | U | submarine | 730 | 2 April 1942 | Scrapped February 1946 |
| Unity | Royal Navy | U | submarine | 730 | 5 October 1938 | Sunk in collision 29 April 1940 |
| Universal | Royal Navy | U | submarine | 730 | 8 March 1943 | Sold for scrap June 1946 |
| Unrivalled | Royal Navy | U | submarine | 730 | 3 May 1942 | Scrapped January 1946 |
| Unruffled | Royal Navy | U | submarine | 730 | 9 April 1942 | Scrapped January 1946 |
| Unruly | Royal Navy | U | submarine | 730 | 3 November 1942 | Scrapped February 1946 |
| Unseen | Royal Navy | U | submarine | 730 | 2 July 1942 | Scrapped September 1949 |
| Unshaken | Royal Navy | U | submarine | 730 | 21 May 1942 | Scrapped March 1946 |
| Unsparing | Royal Navy | U | submarine | 730 | 29 November 1942 | Scrapped 1946 |
| Unswerving | Royal Navy | U | submarine | 730 | 3 October 1943 | Sold for scrap July 1949 |
| Untamed | Royal Navy | U | submarine | 730 | 29 November 1942 | Sank in diving accident 14 April 1943; refloated 5 July 1943; recommissioned as HMS Vitality July 1944; sold for scrap 13 February 1946 |
| Untiring | Royal Navy | U | submarine | 730 | 9 June 1943 | Loaned to Greece as Xifias July 1945; returned 1952; scuttled 25 July 1957 |
| Upholder | Royal Navy | U | submarine | 730 | 31 October 1940 | Missing after 6 April 1942 |
| Upright | Royal Navy | U | submarine | 730 | 3 September 1940 | Scrapped March 1946 |
| Uproar | Royal Navy | U | submarine | 730 | 2 April 1941 | Commissioned as P31; renamed Ullswater February 1943; renamed Uproar April 1943; sold for scrap 13 February 1946 |
| Upshot | Royal Navy | V | submarine | 740 | 15 May 1944 | Decommissioned 2 November 1949; scrapped |
| Upstart | Royal Navy | U | submarine | 730 | 3 April 1943 | Loaned to Greece as Amfitriti 1945–1952; scuttled 29 July 1959 |
| Uredd | Royal Norwegian Navy | U | submarine | 730 | 12 December 1941 | Sunk 10 February 1943 |
| Urge | Royal Navy | U | submarine | 730 | 12 December 1940 | Sunk 27 April 1942 |
| Ursula | Royal Navy | U | submarine | 730 | 20 December 1938 | Transferred to Soviet Union as V-4 26 June 1944; returned early 1950; scrapped May 1950 |
| Urtica | Royal Navy | V | submarine | 740 | 20 June 1944 | Scrapped 1950 |
| Usk | Royal Navy | U | submarine | 730 | 11 October 1940 | Sunk 29 April 1941 |
| Usurper | Royal Navy | U | submarine | 730 | 2 February 1943 | Sunk 3 October 1943 |
| Uther | Royal Navy | U | submarine | 730 | 15 August 1943 | Scrapped April 1950 |
| Utmost | Royal Navy | U | submarine | 730 | 17 August 1940 | Sunk 25 November 1942 |
| Utsira | Royal Norwegian Navy | V | submarine | 740 | 24 August 1944 | Scrapped 1965 |
| V-2 | Soviet Navy | U | submarine | 730 | 29 January 1942 | Former HMS Unbroken, transferred to Soviet Union 26 June 1941; returned to United Kingdom 1949; scrapped May 1950 |
| V-3 | Soviet Navy | U | submarine | 730 | 19 February 1942 | Former HMS Unison, transferred to Soviet Union 26 June 1944; returned 1949; scrapped May 1950 |
| V-4 | Soviet Navy | U | submarine | 730 | 20 December 1938 | Former HMS Ursula, transferred to Soviet Union 28 June 1944; returned to United Kingdom early 1950; scrapped May 1950 |
| V-80 | Kriegsmarine | Type V | midget U-boat | 75 | Never commissioned | Launched 14 April 1940; scuttled 29 March 1945 |
| Vagabond | Royal Navy | V | submarine | 740 | 27 February 1945 | Scrapped 1950 |
| Vampire | Royal Navy | V | submarine | 740 | 13 November 1943 | Scrapped March 1950 |
| Vandal | Royal Navy | U | submarine | 730 | 20 February 1943 | Sank in diving accident 24 February 1949 |
| Varangian | Royal Navy | U | submarine | 730 | 10 July 1943 | Scrapped June 1949 |
| Varne | Royal Navy | V | submarine | 740 | 30 July 1944 | Scrapped September 1958 |
| Veldt | Royal Navy | V | submarine | 740 | 1 November 1943 | Transferred to Greece as Pipinos1 November 1943; returned 10 December 1957; scrapped February 1958 |
| Velella | Regia Marina | Argo | coastal submarine | 1,000 | 1 September 1937 | Sunk 7 September 1943 |
| Vengeful | Royal Navy | V | submarine | 740 | 16 October 1944 | Loaned to Greece as Delfin April 1945; returned 1957; scrapped March 1958 |
| Vengeur | French Navy | Redoutable | cruiser submarine | 1,968 | 18 December 1931 | Scuttled 27 November 1942 |
| Veniero | Regia Marina | Marcello | submarine | 1,313 | 6 June 1938 | Sunk 7 June 1942 |
| Venturer | Royal Navy | V | submarine | 740 | 19 August 1943 | Sold to Norway as Utstein 1946; stricken January 1964; scrapped |
| Vénus | French Navy | Minerve | submarine | 856 | 15 November 1936 | Scuttled 27 November 1942; scrapped 1951 |
| Vesihiisi | Finnish Navy | Vetehinen | submarine | 705 | 2 December 1931 | Decommissioned 1946; scrapped 1950s |
| Vesikko | Finnish Navy | | coastal submarine | 434 | 30 April 1934 | Museum ship 9 July 1973 |
| Vetehinen | Finnish Navy | Vetehinen | submarine | 705 | 13 October 1930 | Decommissioned 1946; scrapped 1950s |
| Vettor Pisani | Regia Marina | Pisani | submarine | 1,040 | 16 June 1929 | Stricken 23 March 1947; scrapped |
| Vigorous | Royal Navy | V | submarine | 740 | 13 January 1944 | Scrapped December 1949 |
| Viking | Royal Navy | V | submarine | 740 | 30 August 1943 | Transferred to Norway as Utvær 1946 |
| Vineyard | Royal Navy | V | submarine | 740 | 1 August 1944 | Transferred to Free French Naval Forces as Doris1 August 1944; returned 18 November 1947; scrapped June 1950 |
| Virtue | Royal Navy | V | submarine | 740 | 29 February 1944 | Scrapped May 1946 |
| Virulent | Royal Navy | V | submarine | 740 | 1 October 1944 | Loaned to Greece as Argonaftis 29 May 1946–3 October 1958; scrapped April 1961 |
| Visigoth | Royal Navy | V | submarine | 740 | 9 March 1944 | Sold for scrap March 1949; scrapped April 1950 |
| Vitality | Royal Navy | U | submarine | 730 | 29 November 1942 | Commissioned as Untamed; sank in diving accident 14 April 1943; refloated 5 July 1943; recommissioned as Vitality July 1944; sold for scrap 13 February 1946 |
| Vivid | Royal Navy | V | submarine | 740 | 19 January 1944 | Scrapped October 1950 |
| Volatile | Royal Navy | V | submarine | 740 | 4 November 1944 | Loaned to Greece as Triaina May 1946; returned 3 October 1958; scrapped December 1958 |
| Voracious | Royal Navy | V | submarine | 740 | 13 April 1944 | Scrapped May 1946 |
| Vortice | Regia Marina | Flutto | submarine | 1,093 | 23 February 1943 | Stricken 1 August 1967 |
| Votary | Royal Navy | V | submarine | 740 | 13 December 1944 | Transferred to Norway as Uthaug July 1946 |
| Vox (P67) | Royal Navy | U | submarine | 740 | 2 May 1943 | Loaned to Free French Naval Forces 2 May 1943; returned July 1946; scrapped May 1949 |
| Vox (P73) | Royal Navy | V | submarine | 740 | 20 December 1943 | Scrapped October 1946 |
| Vulpine | Royal Navy | V | submarine | 740 | 2 June 1944 | Loaned to Denmark as U 2 (later renamed Støren) 1947–1958; scrapped June 1959 |
| Wahoo | United States Navy | Gato | fleet submarine | 2,424 | 15 May 1942 | Sunk 11 October 1943 |
| Whale | United States Navy | Gato | fleet submarine | 2,424 | 1 June 1942 | Sold for scrap 14 October 1960 |
| Wilk | Polish Navy | Wilk | submarine | 1,250 | 31 October 1931 | Decommissioned 2 April 1942; scrapped 1954 |
| Wirun | Royal Thai Navy | Matchanu | submarine | 420 | 19 July 1938 | Scrapped 1952 |
| Volframio | Regia Marina | Acciaio | coastal submarine | 864 | 15 February 1942 | Scuttled 9 September 1943; refloated; sunk 1944 |
| X3 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off 1945 |
| X4 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off 1945 |
| X5 | Royal Navy | X | midget submarine | 30 | 1944 | Sunk 22 September 1943 |
| X6 | Royal Navy | X | midget submarine | 30 | 1944 | Scuttled 22 September 1943 |
| X7 | Royal Navy | X | midget submarine | 30 | 1944 | Scuttled 22 September 1943 |
| X8 | Royal Navy | X | midget submarine | 30 | 1944 | Scuttled 17 September 1943 |
| X9 | Royal Navy | X | midget submarine | 30 | 1944 | Foundered under tow 16 September 1943 |
| X10 | Royal Navy | X | midget submarine | 30 | 1944 | Scuttled 3 October 1943 |
| X20 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off |
| X21 | Royal Navy | X | midget submarine | 30 | 1944 | |
| X22 | Royal Navy | X | midget submarine | 30 | 1944 | Sank in training 7 February 1944 |
| X23 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off 1945 |
| X24 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off 1945 |
| X25 | Royal Navy | X | midget submarine | 30 | 1944 | Paid off 1945 |
| XE1 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE2 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE3 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE4 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE5 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE6 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE7 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1952 |
| XE8 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1952 |
| XE9 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1952 |
| XE10 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1945 |
| XE11 | Royal Navy | XE | midget submarine | 33 | 1944 | Sunk in collision 6 March 1945; later salvaged |
| XE12 | Royal Navy | XE | midget submarine | 33 | 1944 | Paid off 1952 |
| Xifias | Royal Hellenic Navy | U | submarine | 730 | 9 June 1943 | Formerly HMS Untiring; loaned to Greece July 1945; returned to United Kingdom 1952; scuttled 25 July 1957 |
| XT1 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| XT2 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| XT3 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| XT4 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| XT5 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| XT6 | Royal Navy | X | training submarine | 30 | 1944 | Paid off 1945 |
| Yakobinets | Soviet Navy | Dekabrist | submarine | 1,354 | 15 November 1930 | Scuttled 12 November 1941; refloated post-war; scrapped |
| Yu 1 | Imperial Japanese Army | Yu I type | transport submarine | 346 | Between 22 and 31 December 1943 | Sunk 2 January 1945 |
| Yu 2 | Imperial Japanese Army | Yu I type | transport submarine | 346 | Late 1943–early 1944 | Sunk 28 November 1944 |
| Yu 3 | Imperial Japanese Army | Yu I type | transport submarine | 346 | Late 1943–early 1944 | Scuttled 5 January 1945; refloated by U.S. Navy 18 January 1945; subsequently scuttled or scrapped |
| Yu 4 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 5 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 6 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 7 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 8 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 9 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 10 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945; subsequently scrapped |
| Yu 11 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945; subsequently scrapped |
| Yu 12 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945; subsequently scrapped |
| Yu 13 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945; subsequently scrapped |
| Yu 14 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945; subsequently scrapped |
| Yu 15 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 16 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 17 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 18 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 19 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 20 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 21 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 22 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 23 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 24 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Lost in accident 1945 |
| Yu 1001 | Imperial Japanese Army | Yu I type | transport submarine | 346 | 15 June 1944 | Sunk 12 August 1945 |
| Yu 1002 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1003 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1005 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1006 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1007 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; sank in storm 1945 or 1946; scrapped January 1948 |
| Yu 1008 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1009 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 1010 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 2001 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 2002 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 3001 | Imperial Japanese Army | Yu I type | transport submarine | 346 | 2 August 1944 | Surrendered August 1945; subsequently scuttled or scrapped |
| Yu 3002 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Sank in storm 1945 |
| Yu 3003 | Imperial Japanese Army | Yu I type | transport submarine | 346 | | Surrendered August 1945; subsequently scuttled or scrapped |
| Zaffiro | Regia Marina | Sirena | coastal submarine | 837 | 4 June 1934 | Sunk 9 June 1942 |
| Żbik | Polish Navy | Wilk | submarine | 1,250 | 1932 | Interned 25 September 1939; decommissioned 1955; scrapped 1956 |
| Zoea | Regia Marina | Foca | minelayer submarine | 1,625 | 12 February 1938 | Stricken 23 March 1947 |
| Zwaardvisch | Royal Netherlands Navy | T | submarine | 1,560 | 23 November 1943 | Sold for scrap 12 July 1963 |