# List of Gato-class submarines

Seventy-seven Gato-class submarines were built during World War II, commissioned from November 1941 through April 1944. The class was very successful in sinking Japanese merchant ships and naval vessels: the top three US submarines in tonnage sunk were Gatos, along with three of the top seven in number of ships sunk. But success had a price: 20 of the 52 US submarines lost in that war were of this class, plus Halibut, a damaged boat that returned to the US but was considered a constructive total loss and not repaired. Although many of the class were in reserve postwar and scrapped in 1959-1960, some Gatos served actively with the US Navy into the late 1960s, and others served with foreign navies into the early 1970s.
SS-361 through SS-364 were initially ordered as Balao-class, and were assigned hull numbers that fall in the middle of the range of numbers for the Balao class (SS-285 through SS-416 & SS-425–426). Thus, in some references they are listed with that class. However, they were completed by Manitowoc as Gatos, due to an unavoidable delay in Electric Boat's development of Balao-class drawings. Manitowoc was a follow yard to Electric Boat, and was dependent on them for designs and drawings.

## Abbreviations

Abbreviations and hull classification symbols for postwar redesignations/conversions:
* AGSS — auxiliary submarine (various roles including sonar testing)
* APSS/LPSS — amphibious transport submarine
* FS — "fleet snorkel" conversion, including a snorkel and streamlined sail
* G IB — GUPPY IB conversion, including a snorkel, streamlined sail, and improved batteries
* IXSS — unclassified submarine
* PT — pierside trainer for naval reservists, reportedly immobilized by removing the propellers
* SSG — guided missile submarine
* SSK — hunter-killer submarine
* SSO/AOSS — submarine oiler conversion
* SSR — radar picket submarine
* Struck — Struck (deleted) from the Naval Vessel Register, usually followed by scrapping or other final disposal

## Ships in class

Construction data :
| Ship name | Hull no. | Builder | Laid down | Launched | Comm./​Recomm. | Decomm. | Fate |
| Gato | SS-212 | Electric Boat Company, Groton, Connecticut | 5 Oct 1940 | 21 Aug 1941 | 31 Dec 1941 | 16 Mar 1946 | PT 1952-1960; struck 1 Mar 1960, sold for scrap |
| Gato | SS-212 | Electric Boat Company, Groton, Connecticut | 5 Oct 1940 | 21 Aug 1941 | 1952 | 1 Mar 1960 | PT 1952-1960; struck 1 Mar 1960, sold for scrap |
| Greenling | SS-213 | Electric Boat Company, Groton, Connecticut | 12 Nov 1940 | 20 Sep 1941 | 21 Jan 1942 | 16 Oct 1946 | PT 1946-1960; struck 1 Mar 1960, sold for scrap |
| Greenling | SS-213 | Electric Boat Company, Groton, Connecticut | 12 Nov 1940 | 20 Sep 1941 | December 1946 | 1 Mar 1960 | PT 1946-1960; struck 1 Mar 1960, sold for scrap |
| Grouper | SS-214 | Electric Boat Company, Groton, Connecticut | 28 Dec 1940 | 27 Oct 1941 | 12 Feb 1942 | 2 Dec 1968 | SSK Jan 1951; AGSS 21 Jun 1958; struck 2 Dec 1968, sold for scrap |
| Growler | SS-215 | Electric Boat Company, Groton, Connecticut | 10 Feb 1941 | 22 Nov 1941 | 20 Mar 1942 | — | Lost to Japanese surface attack, 8 Nov 1944 |
| Grunion | SS-216 | Electric Boat Company, Groton, Connecticut | 1 Mar 1941 | 22 Dec 1941 | 11 Apr 1942 | — | Lost due likely to circular run of own torpedo, 30 Jul 1942 |
| Guardfish | SS-217 | Electric Boat Company, Groton, Connecticut | 1 Apr 1941 | 20 Jan 1942 | 8 May 1942 | 25 May 1946 | PT 1948-1960; struck 1 Jun 1960, sold for scrap |
| Guardfish | SS-217 | Electric Boat Company, Groton, Connecticut | 1 Apr 1941 | 20 Jan 1942 | 18 Jun 1948 | 1 Jun 1960 | PT 1948-1960; struck 1 Jun 1960, sold for scrap |
| Albacore | SS-218 | Electric Boat Company, Groton, Connecticut | 21 Apr 1941 | 17 Feb 1942 | 1 Jun 1942 | — | Lost to Japanese mine, 7 Nov 1944 |
| Amberjack | SS-219 | Electric Boat Company, Groton, Connecticut | 15 May 1941 | 6 Mar 1942 | 19 Jun 1942 | — | Lost, possibly to Japanese surface attack, 16 Feb 1943 |
| Barb | SS-220 | Electric Boat Company, Groton, Connecticut | 7 Jun 1941 | 2 Apr 1942 | 8 Jul 1942 | 12 Feb 1947 | G IB 1954, transferred to Italy as Enrico Tazzoli 1954; returned to US and sold for scrap 15 Oct 1972 |
| Barb | SS-220 | Electric Boat Company, Groton, Connecticut | 7 Jun 1941 | 2 Apr 1942 | 3 Dec 1951 | 5 Feb 1954 | G IB 1954, transferred to Italy as Enrico Tazzoli 1954; returned to US and sold for scrap 15 Oct 1972 |
| Barb | SS-220 | Electric Boat Company, Groton, Connecticut | 7 Jun 1941 | 2 Apr 1942 | 3 Aug 1954 | 13 Dec 1954 | G IB 1954, transferred to Italy as Enrico Tazzoli 1954; returned to US and sold for scrap 15 Oct 1972 |
| Blackfish | SS-221 | Electric Boat Company, Groton, Connecticut | 1 Jul 1941 | 18 Apr 1942 | 22 Jul 1942 | 11 May 1946 | PT 1949-1954; struck 1 Sep 1958, sold for scrap |
| Blackfish | SS-221 | Electric Boat Company, Groton, Connecticut | 1 Jul 1941 | 18 Apr 1942 | 5 May 1949 | 19 May 1954 | PT 1949-1954; struck 1 Sep 1958, sold for scrap |
| Bluefish | SS-222 | Electric Boat Company, Groton, Connecticut | 5 Jun 1942 | 21 Feb 1943 | 24 May 1943 | 12 Feb 1947 | Struck 1 Sep 1958, sold for scrap 4 May 1959 |
| Bluefish | SS-222 | Electric Boat Company, Groton, Connecticut | 5 Jun 1942 | 21 Feb 1943 | 7 Jan 1952 | 20 Nov 1953 | Struck 1 Sep 1958, sold for scrap 4 May 1959 |
| Bonefish | SS-223 | Electric Boat Company, Groton, Connecticut | 25 Jun 1942 | 7 Mar 1943 | 31 May 1943 | — | Lost to Japanese surface attack, 18 Jun 1945 |
| Cod | SS-224 | Electric Boat Company, Groton, Connecticut | 21 Jul 1942 | 21 Mar 1943 | 21 Jun 1943 | 22 Jun 1946 | PT 1960-1971, AGSS 1 Dec 1962, IXSS 30 Jun 1971, struck 15 Dec 1971. Museum ship currently moored in Cleveland, Ohio's North Coast Harbor at the USS Cod Submarine Memorial since 1 May 1976. |
| Cod | SS-224 | Electric Boat Company, Groton, Connecticut | 21 Jul 1942 | 21 Mar 1943 | 1 May 1960 | 15 Dec 1971 | PT 1960-1971, AGSS 1 Dec 1962, IXSS 30 Jun 1971, struck 15 Dec 1971. Museum ship currently moored in Cleveland, Ohio's North Coast Harbor at the USS Cod Submarine Memorial since 1 May 1976. |
| Cero | SS-225 | Electric Boat Company, Groton, Connecticut | 24 Aug 1942 | 4 Apr 1943 | 4 Jul 1943 | 8 Jun 1946 | PT 1959-1967; struck 30 Jun 1967, sold for scrap October 1970 |
| Cero | SS-225 | Electric Boat Company, Groton, Connecticut | 24 Aug 1942 | 4 Apr 1943 | 4 Feb 1952 | 23 Dec 1953 | PT 1959-1967; struck 30 Jun 1967, sold for scrap October 1970 |
| Cero | SS-225 | Electric Boat Company, Groton, Connecticut | 24 Aug 1942 | 4 Apr 1943 | 12 Sep 1959 | 30 Jun 1967 | PT 1959-1967; struck 30 Jun 1967, sold for scrap October 1970 |
| Corvina | SS-226 | Electric Boat Company, Groton, Connecticut | 21 Sep 1942 | 9 May 1943 | 6 Aug 1943 | — | Lost to Japanese submarine attack, 16 Nov 1943 |
| Darter | SS-227 | Electric Boat Company, Groton, Connecticut | 20 Oct 1942 | 6 Jun 1943 | 7 Sep 1943 | — | Lost to accidental grounding, 24 Oct 1944 |
| Drum | SS-228 | Portsmouth Naval Shipyard, Kittery, Maine | 11 Sep 1940 | 12 May 1941 | 1 Nov 1941 | 16 Feb 1946 | PT 1947-1968, AGSS 1 Dec 1962; struck 30 Jun 1968, memorial in Mobile, Alabama |
| Drum | SS-228 | Portsmouth Naval Shipyard, Kittery, Maine | 11 Sep 1940 | 12 May 1941 | 18 Mar 1947 | 30 Jun 1968 | PT 1947-1968, AGSS 1 Dec 1962; struck 30 Jun 1968, memorial in Mobile, Alabama |
| Flying Fish | SS-229 | Portsmouth Naval Shipyard, Kittery, Maine | 6 Dec 1940 | 9 Jul 1941 | 10 Dec 1941 | 28 May 1954 | AGSS 29 Nov 1950; struck 1 Aug 1958, sold for scrap 1 May 1959 |
| Finback | SS-230 | Portsmouth Naval Shipyard, Kittery, Maine | 5 Feb 1941 | 25 Aug 1941 | 31 Jan 1942 | 21 Apr 1950 | Struck 1 Sep 1958, sold for scrap 15 Jul 1959 |
| Haddock | SS-231 | Portsmouth Naval Shipyard, Kittery, Maine | 31 Mar 1941 | 20 Oct 1941 | 14 Mar 1942 | 12 Feb 1947 | PT 1948-1952, 1956-1960; struck 1 Jun 1960, sold for scrap 23 Aug 1960 |
| Haddock | SS-231 | Portsmouth Naval Shipyard, Kittery, Maine | 31 Mar 1941 | 20 Oct 1941 | August 1948 | May 1952 | PT 1948-1952, 1956-1960; struck 1 Jun 1960, sold for scrap 23 Aug 1960 |
| Haddock | SS-231 | Portsmouth Naval Shipyard, Kittery, Maine | 31 Mar 1941 | 20 Oct 1941 | June 1956 | 1 Jun 1960 | PT 1948-1952, 1956-1960; struck 1 Jun 1960, sold for scrap 23 Aug 1960 |
| Halibut | SS-232 | Portsmouth Naval Shipyard, Kittery, Maine | 16 May 1941 | 3 Dec 1941 | 10 Apr 1942 | 18 Jul 1945 | Constructive total loss following Japanese air attack 14 Nov 1944, returned to US but not repaired, struck 8 May 1946, sold for scrap 9 Dec 1946 |
| Herring | SS-233 | Portsmouth Naval Shipyard, Kittery, Maine | 14 Jul 1941 | 5 Jan 1942 | 4 May 1942 | — | Lost to Japanese shore batteries, 1 Jun 1944 |
| Kingfish | SS-234 | Portsmouth Naval Shipyard, Kittery, Maine | 29 Aug 1941 | 2 Mar 1942 | 20 May 1942 | 9 Mar 1946 | PT 1947-1960; struck 1 Mar 1960, sold for scrap 6 Oct 1960 |
| Kingfish | SS-234 | Portsmouth Naval Shipyard, Kittery, Maine | 29 Aug 1941 | 2 Mar 1942 | 6 Oct 1947 | 1 Mar 1960 | PT 1947-1960; struck 1 Mar 1960, sold for scrap 6 Oct 1960 |
| Shad | SS-235 | Portsmouth Naval Shipyard, Kittery, Maine | 24 Oct 1941 | 15 Apr 1942 | 12 Jun 1942 | 24 Apr 1946 | PT 1948-1960; struck 1 Apr 1960, sold for scrap 11 Jul 1960 |
| Shad | SS-235 | Portsmouth Naval Shipyard, Kittery, Maine | 24 Oct 1941 | 15 Apr 1942 | October 1947 | 1 Apr 1960 | PT 1948-1960; struck 1 Apr 1960, sold for scrap 11 Jul 1960 |
| Silversides | SS-236 | Mare Island Naval Shipyard, Vallejo, California | 4 Nov 1940 | 26 Aug 1941 | 15 Dec 1941 | 17 Apr 1946 | PT 1947-1969, AGSS 1 Dec 1962; struck 30 Jun 1969, memorial in Chicago, Illinois 1973-1987, memorial in Muskegon, Michigan 1987-present |
| Silversides | SS-236 | Mare Island Naval Shipyard, Vallejo, California | 4 Nov 1940 | 26 Aug 1941 | 15 Oct 1947 | 30 Jun 1969 | PT 1947-1969, AGSS 1 Dec 1962; struck 30 Jun 1969, memorial in Chicago, Illinois 1973-1987, memorial in Muskegon, Michigan 1987-present |
| Trigger | SS-237 | Mare Island Naval Shipyard, Vallejo, California | 1 Feb 1941 | 22 Oct 1941 | 31 Jan 1942 | — | Lost to Japanese surface attack, 28 Mar 1945 |
| Wahoo | SS-238 | Mare Island Naval Shipyard, Vallejo, California | 28 Jun 1941 | 14 Feb 1942 | 15 May 1942 | — | Lost to Japanese air attack, 11 Oct 1943 |
| Whale | SS-239 | Mare Island Naval Shipyard, Vallejo, California | 28 Jun 1941 | 14 Mar 1942 | 1 Jun 1942 | 1 Jun 1946 | PT 1957-1960; struck 1 Mar 1960, sold for scrap 14 Oct 1960 |
| Whale | SS-239 | Mare Island Naval Shipyard, Vallejo, California | 28 Jun 1941 | 14 Mar 1942 | 22 Jan 1957 | 1 Mar 1960 | PT 1957-1960; struck 1 Mar 1960, sold for scrap 14 Oct 1960 |
| Angler | SS-240 | Electric Boat Company, Groton, Connecticut | 9 Nov 1942 | 4 Jul 1943 | 1 Oct 1943 | 2 Feb 1947 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, IXSS 30 Jun 1971, PT 1968-1971; struck 15 Dec 1971, sold for scrap 1 Feb 1974 |
| Angler | SS-240 | Electric Boat Company, Groton, Connecticut | 9 Nov 1942 | 4 Jul 1943 | 2 Apr 1951 | 10 Nov 1952 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, IXSS 30 Jun 1971, PT 1968-1971; struck 15 Dec 1971, sold for scrap 1 Feb 1974 |
| Angler | SS-240 | Electric Boat Company, Groton, Connecticut | 9 Nov 1942 | 4 Jul 1943 | 10 Sep 1953 | 1 Apr 1968 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, IXSS 30 Jun 1971, PT 1968-1971; struck 15 Dec 1971, sold for scrap 1 Feb 1974 |
| Angler | SS-240 | Electric Boat Company, Groton, Connecticut | 9 Nov 1942 | 4 Jul 1943 | 1 Apr 1968 | 15 Dec 1971 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, IXSS 30 Jun 1971, PT 1968-1971; struck 15 Dec 1971, sold for scrap 1 Feb 1974 |
| Bashaw | SS-241 | Electric Boat Company, Groton, Connecticut | 4 Dec 1942 | 25 Jul 1943 | 25 Oct 1943 | 29 Jun 1949 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Sep 1962; struck 13 Sep 1969, sold for scrap 4 Aug 1972 (some sources state sunk as target) |
| Bashaw | SS-241 | Electric Boat Company, Groton, Connecticut | 4 Dec 1942 | 25 Jul 1943 | 3 Apr 1951 | 10 May 1952 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Sep 1962; struck 13 Sep 1969, sold for scrap 4 Aug 1972 (some sources state sunk as target) |
| Bashaw | SS-241 | Electric Boat Company, Groton, Connecticut | 4 Dec 1942 | 25 Jul 1943 | 28 Mar 1953 | 13 Sep 1969 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Sep 1962; struck 13 Sep 1969, sold for scrap 4 Aug 1972 (some sources state sunk as target) |
| Bluegill | SS-242 | Electric Boat Company, Groton, Connecticut | 7 Dec 1942 | 8 Aug 1943 | 11 Nov 1943 | 1 Mar 1946 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Apr 1966; struck 28 Jun 1969, scuttled off Hawaii 3 Dec 1970, wreck used for salvage training, towed to deep water and sunk with honors 6 Nov 1983 |
| Bluegill | SS-242 | Electric Boat Company, Groton, Connecticut | 7 Dec 1942 | 8 Aug 1943 | 3 May 1951 | 7 Jul 1952 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Apr 1966; struck 28 Jun 1969, scuttled off Hawaii 3 Dec 1970, wreck used for salvage training, towed to deep water and sunk with honors 6 Nov 1983 |
| Bluegill | SS-242 | Electric Boat Company, Groton, Connecticut | 7 Dec 1942 | 8 Aug 1943 | 2 May 1953 | 28 Jun 1969 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Apr 1966; struck 28 Jun 1969, scuttled off Hawaii 3 Dec 1970, wreck used for salvage training, towed to deep water and sunk with honors 6 Nov 1983 |
| Bream | SS-243 | Electric Boat Company, Groton, Connecticut | 5 Feb 1943 | 17 Oct 1943 | 24 Jan 1944 | 31 Jan 1946 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 15 Apr 1965; struck 28 Jun 1969, sunk as target 7 Nov 1969 |
| Bream | SS-243 | Electric Boat Company, Groton, Connecticut | 5 Feb 1943 | 17 Oct 1943 | 5 Jun 1951 | 10 Sep 1952 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 15 Apr 1965; struck 28 Jun 1969, sunk as target 7 Nov 1969 |
| Bream | SS-243 | Electric Boat Company, Groton, Connecticut | 5 Feb 1943 | 17 Oct 1943 | 20 Jun 1953 | 28 Jun 1969 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 15 Apr 1965; struck 28 Jun 1969, sunk as target 7 Nov 1969 |
| Cavalla | SS-244 | Electric Boat Company, Groton, Connecticut | 4 Mar 1943 | 14 Nov 1943 | 29 Feb 1944 | 16 Mar 1946 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, PT 1968-1969; struck 30 Dec 1969, memorial in Galveston, Texas |
| Cavalla | SS-244 | Electric Boat Company, Groton, Connecticut | 4 Mar 1943 | 14 Nov 1943 | 10 Apr 1951 | 3 Sep 1952 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, PT 1968-1969; struck 30 Dec 1969, memorial in Galveston, Texas |
| Cavalla | SS-244 | Electric Boat Company, Groton, Connecticut | 4 Mar 1943 | 14 Nov 1943 | 15 Jul 1953 | 3 Jun 1968 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, PT 1968-1969; struck 30 Dec 1969, memorial in Galveston, Texas |
| Cavalla | SS-244 | Electric Boat Company, Groton, Connecticut | 4 Mar 1943 | 14 Nov 1943 | 3 Jun 1968 | 30 Dec 1969 | SSK 18 Feb 1953, SS 15 Aug 1959, AGSS 1 Jul 1963, PT 1968-1969; struck 30 Dec 1969, memorial in Galveston, Texas |
| Cobia | SS-245 | Electric Boat Company, Groton, Connecticut | 17 Mar 1943 | 28 Nov 1943 | 29 Mar 1944 | 22 May 1946 | PT 1959-1970, AGSS 1 Dec 1962; struck 1 Jul 1970, memorial in Manitowoc, Wisconsin |
| Cobia | SS-245 | Electric Boat Company, Groton, Connecticut | 17 Mar 1943 | 28 Nov 1943 | 6 Jul 1951 | 19 Mar 1954 | PT 1959-1970, AGSS 1 Dec 1962; struck 1 Jul 1970, memorial in Manitowoc, Wisconsin |
| Cobia | SS-245 | Electric Boat Company, Groton, Connecticut | 17 Mar 1943 | 28 Nov 1943 | 12 Sep 1959 | 1 Jul 1970 | PT 1959-1970, AGSS 1 Dec 1962; struck 1 Jul 1970, memorial in Manitowoc, Wisconsin |
| Croaker | SS-246 | Electric Boat Company, Groton, Connecticut | 1 Apr 1943 | 19 Dec 1943 | 21 Apr 1944 | 15 Jun 1946 | SSK 9 Apr 1953, SS 15 Aug 1959, AGSS 1 May 1967, IXSS 30 Jun 1971, PT 1968-1971; struck 20 Dec 1971, memorial in Groton, CT 1977-1987, memorial in Buffalo, New York 1988-present |
| Croaker | SS-246 | Electric Boat Company, Groton, Connecticut | 1 Apr 1943 | 19 Dec 1943 | 7 May 1951 | 18 Mar 1953 | SSK 9 Apr 1953, SS 15 Aug 1959, AGSS 1 May 1967, IXSS 30 Jun 1971, PT 1968-1971; struck 20 Dec 1971, memorial in Groton, CT 1977-1987, memorial in Buffalo, New York 1988-present |
| Croaker | SS-246 | Electric Boat Company, Groton, Connecticut | 1 Apr 1943 | 19 Dec 1943 | 11 Dec 1953 | 2 Apr 1968 | SSK 9 Apr 1953, SS 15 Aug 1959, AGSS 1 May 1967, IXSS 30 Jun 1971, PT 1968-1971; struck 20 Dec 1971, memorial in Groton, CT 1977-1987, memorial in Buffalo, New York 1988-present |
| Croaker | SS-246 | Electric Boat Company, Groton, Connecticut | 1 Apr 1943 | 19 Dec 1943 | 2 Apr 1968 | 20 Dec 1971 | SSK 9 Apr 1953, SS 15 Aug 1959, AGSS 1 May 1967, IXSS 30 Jun 1971, PT 1968-1971; struck 20 Dec 1971, memorial in Groton, CT 1977-1987, memorial in Buffalo, New York 1988-present |
| Dace | SS-247 | Electric Boat Company, Groton, Connecticut | 22 Jul 1942 | 25 Apr 1943 | 23 Jul 1943 | 12 Feb 1947 | G IB 1955, transferred to Italy as Leonardo da Vinci 1955; returned to US and sold for scrap 15 Oct 1972 |
| Dace | SS-247 | Electric Boat Company, Groton, Connecticut | 22 Jul 1942 | 25 Apr 1943 | 8 Aug 1951 | 15 Jan 1954 | G IB 1955, transferred to Italy as Leonardo da Vinci 1955; returned to US and sold for scrap 15 Oct 1972 |
| Dace | SS-247 | Electric Boat Company, Groton, Connecticut | 22 Jul 1942 | 25 Apr 1943 | 22 Oct 1954 | 31 Jan 1955 | G IB 1955, transferred to Italy as Leonardo da Vinci 1955; returned to US and sold for scrap 15 Oct 1972 |
| Dorado | SS-248 | Electric Boat Company, Groton, Connecticut | 27 Aug 1942 | 23 May 1943 | 28 Aug 1943 | — | Lost, probably to "friendly fire" air attack or German mine off Panama, 12 Oct 1943 |
| Flasher | SS-249 | Electric Boat Company, Groton, Connecticut | 30 Sep 1942 | 20 Jun 1943 | 25 Sep 1943 | 16 Mar 1946 | Struck 1 Jun 1959, sold for scrap 8 Jun 1963, conning tower preserved as memorial in Groton, Connecticut |
| Flier | SS-250 | Electric Boat Company, Groton, Connecticut | 30 Oct 1942 | 11 Jun 1943 | 18 Oct 1943 | — | Lost to Japanese mine, 13 Aug 1944 |
| Flounder | SS-251 | Electric Boat Company, Groton, Connecticut | 5 Dec 1942 | 22 Aug 1943 | 29 Nov 1943 | 12 Feb 1947 | Struck 1 Jun 1959, sold for scrap 2 Feb 1960 |
| Gabilan | SS-252 | Electric Boat Company, Groton, Connecticut | 5 Jan 1943 | 19 Sep 1943 | 28 Dec 1943 | 23 Feb 1946 | Struck 1 Jun 1959, sold for scrap 11 Jan 1960 |
| Gunnel | SS-253 | Electric Boat Company, Groton, Connecticut | 27 Jul 1941 | 17 May 1942 | 20 Aug 1942 | 18 May 1946 | Struck 1 Sep 1958, sold for scrap December 1959 |
| Gurnard | SS-254 | Electric Boat Company, Groton, Connecticut | 2 Sep 1941 | 1 Jun 1942 | 18 Sep 1942 | 27 Nov 1945 | PT 1949-1960; struck 1 May 1961, sold for scrap 29 Oct 1961 |
| Gurnard | SS-254 | Electric Boat Company, Groton, Connecticut | 2 Sep 1941 | 1 Jun 1942 | April 1949 | June 1960 | PT 1949-1960; struck 1 May 1961, sold for scrap 29 Oct 1961 |
| Haddo | SS-255 | Electric Boat Company, Groton, Connecticut | 1 Oct 1941 | 21 Jun 1942 | 9 Oct 1942 | 16 Feb 1946 | Struck 1 Aug 1958, sold for scrap 4 May 1959 |
| Hake | SS-256 | Electric Boat Company, Groton, Connecticut | 1 Nov 1941 | 17 Jul 1942 | 30 Oct 1942 | 13 Jul 1946 | PT 1956-1968, AGSS 1 Dec 1962; struck 19 Apr 1968; salvage training hulk in Chesapeake Bay 1968-1972, sold for scrap 5 Dec 1972 |
| Hake | SS-256 | Electric Boat Company, Groton, Connecticut | 1 Nov 1941 | 17 Jul 1942 | 15 Oct 1956 | 19 Apr 1968 | PT 1956-1968, AGSS 1 Dec 1962; struck 19 Apr 1968; salvage training hulk in Chesapeake Bay 1968-1972, sold for scrap 5 Dec 1972 |
| Harder | SS-257 | Electric Boat Company, Groton, Connecticut | 1 Dec 1941 | 19 Aug 1942 | 2 Dec 1942 | — | Lost to Japanese surface attack, 24 Aug 1944 |
| Hoe | SS-258 | Electric Boat Company, Groton, Connecticut | 2 Jan 1942 | 17 Sep 1942 | 16 Dec 1942 | 7 Aug 1946 | PT 1956-1960; struck 1 May 1960, sold for scrap 10 Sep 1960 |
| Hoe | SS-258 | Electric Boat Company, Groton, Connecticut | 2 Jan 1942 | 17 Sep 1942 | September 1956 | 15 Apr 1960 | PT 1956-1960; struck 1 May 1960, sold for scrap 10 Sep 1960 |
| Jack | SS-259 | Electric Boat Company, Groton, Connecticut | 2 Feb 1942 | 16 Oct 1942 | 6 Jan 1943 | 8 Jun 1946 | Snorkel added 1958, transferred to Greece as Amphitriti 1958; returned to US and struck 1 Sep 1967, sunk as target 5 Sep 1967 |
| Jack | SS-259 | Electric Boat Company, Groton, Connecticut | 2 Feb 1942 | 16 Oct 1942 | 20 Dec 1957 | 21 Apr 1958 | Snorkel added 1958, transferred to Greece as Amphitriti 1958; returned to US and struck 1 Sep 1967, sunk as target 5 Sep 1967 |
| Lapon | SS-260 | Electric Boat Company, Groton, Connecticut | 21 Feb 1942 | 27 Oct 1942 | 23 Jan 1943 | 25 Jul 1946 | Snorkel added 1957, transferred to Greece as Poseidon 1957; struck 31 Dec 1975, purchased by Greece for spare parts and sunk as target April 1976 |
| Lapon | SS-260 | Electric Boat Company, Groton, Connecticut | 21 Feb 1942 | 27 Oct 1942 | 13 Apr 1957 | 10 Aug 1957 | Snorkel added 1957, transferred to Greece as Poseidon 1957; struck 31 Dec 1975, purchased by Greece for spare parts and sunk as target April 1976 |
| Mingo | SS-261 | Electric Boat Company, Groton, Connecticut | 21 Mar 1942 | 30 Nov 1942 | 12 Feb 1943 | January 1947 | Transferred to Japan as Kuroshio 15 Aug 1955; returned to US control 31 Mar 1966, struck and sold to Japan 20 Feb 1971, sunk as target 1973 |
| Mingo | SS-261 | Electric Boat Company, Groton, Connecticut | 21 Mar 1942 | 30 Nov 1942 | 20 May 1955 | 15 Aug 1955 | Transferred to Japan as Kuroshio 15 Aug 1955; returned to US control 31 Mar 1966, struck and sold to Japan 20 Feb 1971, sunk as target 1973 |
| Muskallunge | SS-262 | Electric Boat Company, Groton, Connecticut | 7 Apr 1942 | 13 Dec 1942 | 15 Mar 1943 | 29 Jan 1947 | Transferred to Brazil as Humaitá 18 Jan 1957; struck 1 Dec 1967, returned to US March 1968, sunk as target 9 Jul 1968 |
| Muskallunge | SS-262 | Electric Boat Company, Groton, Connecticut | 7 Apr 1942 | 13 Dec 1942 | 31 Aug 1956 | 18 Jan 1957 | Transferred to Brazil as Humaitá 18 Jan 1957; struck 1 Dec 1967, returned to US March 1968, sunk as target 9 Jul 1968 |
| Paddle | SS-263 | Electric Boat Company, Groton, Connecticut | 1 May 1942 | 30 Dec 1942 | 29 Mar 1943 | 1 Feb 1946 | Transferred to Brazil as Riachuelo 18 Jan 1957; returned to US control March 1968, struck 30 Jun 1968, used for spare parts by Brazil (one source says sunk (sic) about 30 Jun 1968) |
| Paddle | SS-263 | Electric Boat Company, Groton, Connecticut | 1 May 1942 | 30 Dec 1942 | 31 Aug 1956 | 18 Jan 1957 | Transferred to Brazil as Riachuelo 18 Jan 1957; returned to US control March 1968, struck 30 Jun 1968, used for spare parts by Brazil (one source says sunk (sic) about 30 Jun 1968) |
| Pargo | SS-264 | Electric Boat Company, Groton, Connecticut | 21 May 1942 | 24 Jan 1943 | 26 Apr 1943 | 12 Jun 1946 | PT 1946-1960; struck 1 Dec 1960, sold for scrap 16 May 1961 |
| Pargo | SS-264 | Electric Boat Company, Groton, Connecticut | 21 May 1942 | 24 Jan 1943 | 12 Jun 1946 | 1 Dec 1960 | PT 1946-1960; struck 1 Dec 1960, sold for scrap 16 May 1961 |
| Peto | SS-265 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 15 Jun 1941 | 30 Apr 1942 | 21 Nov 1942 | 25 Dec 1942 | Peto and Pogy (only) administratively decommissioned during barge delivery via Mississippi River, PT 1956-1960; struck 1 Aug 1960, sold for scrap 29 Nov 1960 |
| Peto | SS-265 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 15 Jun 1941 | 30 Apr 1942 | January 1943 | 25 Jun 1946 | Peto and Pogy (only) administratively decommissioned during barge delivery via Mississippi River, PT 1956-1960; struck 1 Aug 1960, sold for scrap 29 Nov 1960 |
| Peto | SS-265 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 15 Jun 1941 | 30 Apr 1942 | November 1956 | 1 Aug 1960 | Peto and Pogy (only) administratively decommissioned during barge delivery via Mississippi River, PT 1956-1960; struck 1 Aug 1960, sold for scrap 29 Nov 1960 |
| Pogy | SS-266 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 15 Sep 1941 | 23 Jun 1942 | 10 Jan 1943 | 1 Feb 1943 | Peto and Pogy (only) administratively decommissioned during barge delivery via Mississippi River; struck 1 Sep 1958, sold for scrap 1 May 1959 |
| Pogy | SS-266 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 15 Sep 1941 | 23 Jun 1942 | 12 Feb 1943 | 30 Jul 1946 | Peto and Pogy (only) administratively decommissioned during barge delivery via Mississippi River; struck 1 Sep 1958, sold for scrap 1 May 1959 |
| Pompon | SS-267 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 26 Nov 1941 | 15 Aug 1942 | 17 Mar 1943 | 11 May 1946 | SSR 11 Dec 1951; struck 1 Apr 1960, sold for scrap 22 Dec 1960 |
| Pompon | SS-267 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 26 Nov 1941 | 15 Aug 1942 | 15 Jun 1953 | 1 Apr 1960 | SSR 11 Dec 1951; struck 1 Apr 1960, sold for scrap 22 Dec 1960 |
| Puffer | SS-268 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 16 Feb 1942 | 22 Nov 1942 | 27 Apr 1943 | 28 Jun 1946 | PT 1946-1960; struck 1 Jul 1960, sold for scrap 3 Dec 1960 |
| Puffer | SS-268 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 16 Feb 1942 | 22 Nov 1942 | 1946 | 10 Jun 1960 | PT 1946-1960; struck 1 Jul 1960, sold for scrap 3 Dec 1960 |
| Rasher | SS-269 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 4 May 1942 | 20 Dec 1942 | 8 Jun 1943 | 22 Jun 1946 | SSR 11 Dec 1951, AGSS 1 Jul 1960, IXSS 30 Jun 1971, PT 1967-1971; struck 20 Dec 1971, sold for scrap 7 Aug 1974 |
| Rasher | SS-269 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 4 May 1942 | 20 Dec 1942 | 14 Dec 1951 | 28 May 1952 | SSR 11 Dec 1951, AGSS 1 Jul 1960, IXSS 30 Jun 1971, PT 1967-1971; struck 20 Dec 1971, sold for scrap 7 Aug 1974 |
| Rasher | SS-269 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 4 May 1942 | 20 Dec 1942 | 22 Jul 1953 | 27 May 1967 | SSR 11 Dec 1951, AGSS 1 Jul 1960, IXSS 30 Jun 1971, PT 1967-1971; struck 20 Dec 1971, sold for scrap 7 Aug 1974 |
| Raton | SS-270 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 29 May 1942 | 24 Jan 1943 | 13 Jul 1943 | 11 Mar 1949 | SSR 18 Jul 1952, AGSS 1 Jul 1960; struck 28 Jun 1969, sold for scrap 12 Oct 1973, hulk reportedly used as target |
| Raton | SS-270 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 29 May 1942 | 24 Jan 1943 | 21 Sep 1953 | 28 Jun 1969 | SSR 18 Jul 1952, AGSS 1 Jul 1960; struck 28 Jun 1969, sold for scrap 12 Oct 1973, hulk reportedly used as target |
| Ray | SS-271 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 20 Jul 1942 | 28 Feb 1943 | 27 Jul 1943 | 12 Feb 1947 | SSR 2 Jan 1951; struck 1 Apr 1960, sold for scrap 18 Dec 1960 |
| Ray | SS-271 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 20 Jul 1942 | 28 Feb 1943 | 13 Aug 1952 | 30 Sep 1958 | SSR 2 Jan 1951; struck 1 Apr 1960, sold for scrap 18 Dec 1960 |
| Redfin | SS-272 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 3 Sep 1942 | 4 Apr 1943 | 31 Aug 1943 | 1 Nov 1946 | SSR 2 Jan 1951, SS 15 Aug 1959, AGSS 28 Jun 1963, PT 1967-1970; struck 1 Jul 1970, sold for scrap 31 Mar 1971 |
| Redfin | SS-272 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 3 Sep 1942 | 4 Apr 1943 | 13 Aug 1952 | 30 Sep 1958 | SSR 2 Jan 1951, SS 15 Aug 1959, AGSS 28 Jun 1963, PT 1967-1970; struck 1 Jul 1970, sold for scrap 31 Mar 1971 |
| Robalo | SS-273 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 24 Oct 1942 | 9 May 1943 | 28 Sep 1943 | — | Lost to Japanese mine, 26 Jul 1944 |
| Rock | SS-274 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 23 Dec 1942 | 20 Jun 1943 | 26 Oct 1943 | 1 May 1946 | SSR 18 Jul 1952, AGSS 31 Dec 1959; struck 13 Sep 1969, held for use as target, but sold for scrap 18 Sep 1972 |
| Rock | SS-274 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 23 Dec 1942 | 20 Jun 1943 | 12 Oct 1953 | 13 Sep 1969 | SSR 18 Jul 1952, AGSS 31 Dec 1959; struck 13 Sep 1969, held for use as target, but sold for scrap 18 Sep 1972 |
| Runner | SS-275 | Portsmouth Naval Shipyard, Kittery, Maine | 8 Dec 1941 | 30 May 1942 | 30 Jul 1942 | — | Lost to unknown cause, possibly Japanese mine, circa 1 Jul 1943 |
| Sawfish | SS-276 | Portsmouth Naval Shipyard, Kittery, Maine | 20 Jan 1942 | 23 Jun 1942 | 26 Aug 1942 | 20 Jun 1946 | PT 1947-1960; struck 1 Apr 1960, sold for scrap 2 Dec 1960 |
| Sawfish | SS-276 | Portsmouth Naval Shipyard, Kittery, Maine | 20 Jan 1942 | 23 Jun 1942 | 15 May 1947 | 1 Apr 1960 | PT 1947-1960; struck 1 Apr 1960, sold for scrap 2 Dec 1960 |
| Scamp | SS-277 | Portsmouth Naval Shipyard, Kittery, Maine | 6 Mar 1942 | 20 Jul 1942 | 18 Sep 1942 | — | Lost, probably to Japanese surface and air attack, 11 Nov 1944 |
| Scorpion | SS-278 | Portsmouth Naval Shipyard, Kittery, Maine | 20 Mar 1942 | 20 Jul 1942 | 1 Oct 1942 | — | Lost to unknown cause, possibly Japanese mine, circa 5 Jan 1944 |
| Snook | SS-279 | Portsmouth Naval Shipyard, Kittery, Maine | 17 Apr 1942 | 15 Aug 1942 | 24 Oct 1942 | — | Lost, possibly to Japanese surface attack circa 12 Apr 1945 |
| Steelhead | SS-280 | Portsmouth Naval Shipyard, Kittery, Maine | 1 Jun 1942 | 11 Sep 1942 | 7 Dec 1942 | 29 Jun 1946 | PT 1947-1960; struck 1 Apr 1960, sold for scrap 21 Dec 1960 |
| Steelhead | SS-280 | Portsmouth Naval Shipyard, Kittery, Maine | 1 Jun 1942 | 11 Sep 1942 | 12 Nov 1947 | 1 Apr 1960 | PT 1947-1960; struck 1 Apr 1960, sold for scrap 21 Dec 1960 |
| Sunfish | SS-281 | Mare Island Naval Shipyard, Vallejo, California | 25 Sep 1941 | 2 May 1942 | 15 Jul 1942 | 26 Dec 1945 | PT 1949-1960; struck 1 May 1960, sold for scrap 15 Dec 1960 |
| Sunfish | SS-281 | Mare Island Naval Shipyard, Vallejo, California | 25 Sep 1941 | 2 May 1942 | April 1949 | 1 May 1960 | PT 1949-1960; struck 1 May 1960, sold for scrap 15 Dec 1960 |
| Tunny | SS-282 | Mare Island Naval Shipyard, Vallejo, California | 10 Nov 1941 | 30 Jun 1942 | 1 Sep 1942 | 12 Feb 1946 | SSG 18 Jul 1952, SS 15 May 1965, APSS 1 Oct 1966, LPSS 1 Jan 1969; struck 30 Jun 1969, sunk as target 19 Jun 1970 |
| Tunny | SS-282 | Mare Island Naval Shipyard, Vallejo, California | 10 Nov 1941 | 30 Jun 1942 | 25 Feb 1952 | 30 Apr 1952 | SSG 18 Jul 1952, SS 15 May 1965, APSS 1 Oct 1966, LPSS 1 Jan 1969; struck 30 Jun 1969, sunk as target 19 Jun 1970 |
| Tunny | SS-282 | Mare Island Naval Shipyard, Vallejo, California | 10 Nov 1941 | 30 Jun 1942 | 6 Mar 1953 | 28 Jun 1969 | SSG 18 Jul 1952, SS 15 May 1965, APSS 1 Oct 1966, LPSS 1 Jan 1969; struck 30 Jun 1969, sunk as target 19 Jun 1970 |
| Tinosa | SS-283 | Mare Island Naval Shipyard, Vallejo, California | 21 Feb 1942 | 7 Oct 1942 | 15 Jan 1943 | 23 Jun 1949 | Struck 1 Sep 1958, used as ASW target, scuttled November 1960 |
| Tinosa | SS-283 | Mare Island Naval Shipyard, Vallejo, California | 21 Feb 1942 | 7 Oct 1942 | 4 Jan 1952 | 2 Dec 1953 | Struck 1 Sep 1958, used as ASW target, scuttled November 1960 |
| Tullibee | SS-284 | Mare Island Naval Shipyard, Vallejo, California | 1 Apr 1942 | 11 Nov 1942 | 15 Feb 1943 | — | Lost due to circular run of own torpedo, 26 Mar 1944 |
| Golet | SS-361 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 27 Jan 1943 | 1 Aug 1943 | 30 Nov 1943 | — | Lost to Japanese surface attack, 14 Jun 1944 |
| Guavina | SS-362 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 3 Mar 1943 | 29 Aug 1943 | 23 Dec 1943 | 8 Jun 1946 | SSO 16 Aug 1948, AGSS 11 Dec 1951, AOSS 22 Jun 1957, PT 1960-1967; struck 30 Jun 1967, sunk as target 14 Nov 1967 |
| Guavina | SS-362 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 3 Mar 1943 | 29 Aug 1943 | 1 Feb 1950 | 27 Mar 1959 | SSO 16 Aug 1948, AGSS 11 Dec 1951, AOSS 22 Jun 1957, PT 1960-1967; struck 30 Jun 1967, sunk as target 14 Nov 1967 |
| Guavina | SS-362 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 3 Mar 1943 | 29 Aug 1943 | February 1960 | 30 Jun 1967 | SSO 16 Aug 1948, AGSS 11 Dec 1951, AOSS 22 Jun 1957, PT 1960-1967; struck 30 Jun 1967, sunk as target 14 Nov 1967 |
| Guitarro | SS-363 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 7 Apr 1943 | 26 Sep 1943 | 26 Jan 1944 | 6 Dec 1945 | Snorkel added 1954, transferred to Turkey as Preveze 7 Aug 1954, struck and sold to Turkey 1 Jan 1972, decommissioned by Turkey 4 May 1972, used as battery charging hulk until scrapped September 1983, sail preserved as memorial at Gölcük Naval Base until earthquake 17 Aug 1999 |
| Guitarro | SS-363 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 7 Apr 1943 | 26 Sep 1943 | 6 Feb 1952 | 22 Sep 1953 | Snorkel added 1954, transferred to Turkey as Preveze 7 Aug 1954, struck and sold to Turkey 1 Jan 1972, decommissioned by Turkey 4 May 1972, used as battery charging hulk until scrapped September 1983, sail preserved as memorial at Gölcük Naval Base until earthquake 17 Aug 1999 |
| Hammerhead | SS-364 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 5 May 1943 | 24 Oct 1943 | 1 Mar 1944 | 9 Feb 1946 | Snorkel added 1954, transferred to Turkey as Cerbe 23 Oct 1954, struck and sold to Turkey 1 Jan 1972, decommissioned by Turkey 4 May 1972, subsequently scrapped |
| Hammerhead | SS-364 | Manitowoc Shipbuilding Company, Manitowoc, Wisconsin | 5 May 1943 | 24 Oct 1943 | 6 Feb 1952 | 21 Aug 1953 | Snorkel added 1954, transferred to Turkey as Cerbe 23 Oct 1954, struck and sold to Turkey 1 Jan 1972, decommissioned by Turkey 4 May 1972, subsequently scrapped |