# List of ship launches in 1820

The list of ship launches in 1820 includes a chronological list of some ships launched in 1820.
| Date | Country | Builder | Location | Ship | Class | Notes |
| 3 January | United Kingdom | George Gooch | Rotherhithe | Coromandel | Merchantman | For Scott& Co. |
| January | United Kingdom | Wilson & Co. | Liverpool | Helen Jane | East Indiaman | For Messrs. Gladstone & Co. |
| January | United Kingdom | Mottershead & Heyes | Liverpool | Huskisson | East Indiaman | For Messrs. Tobins & Co. |
| January | United Kingdom | Mulby and Evans | Liverpool | Packet | Merchantman | For Messrs. Kerslake & Co. |
| 2 February | United Kingdom | J. & W. Quirk | Liverpool | George the Fourth | Brig | For private owner. |
| February | United Kingdom | J Hepton | Sunderland | Albion | Brig | For J. Hepton. |
| 10 March | United Kingdom | Ritchie and McLaine | Belfast | Belfast | Steamship | For George Langtry. |
| 16 March | United Kingdom | Henry Canham | Woolwich Dockyard | Hawke | Black Prince-class ship of the line | For Royal Navy. |
| 24 March | United Kingdom | John Scott & Sons. | Greenock | Clyde | Merchantman | For John Scott & Sons. |
| March | United Kingdom | W. & J. Pile | Sunderland | Jesmond | Snow | For Mr. Anderson. |
| 25 April | United Kingdom | White | West Cowes | Unnamed | Brig | For private owner. |
| April | United States | | | John and William | Schooner | For private owner. |
| 1 May | United Kingdom | | Emsworth | Henry | Schooner | For private owner. |
| 3 May | United Kingdom | White | West Cowes | Trinity Buoy Yacht | Yacht | For private owner. |
| 4 May | Russia | | Kazan | Gerkules | Ariadna-class corvette | For Imperial Russian Navy. |
| 5 May | Russia | B. F. Stoke | Saint Petersburg | Aiaks | Aiaks-class sloop | For Imperial Russian Navy. |
| 5 May | Russia | B. F. Stoke | Saint Petersburg | Ida | Aiaks-class sloop | For Imperial Russian Navy. |
| 7 May | Russia | I. Y. Osminin | Sevastopol | Merkurii | Brig | For Imperial Russian Navy. |
| 11 May | United Kingdom | | Woolwich Dockyard | Beagle | Cherokee-class brig-sloop | For Royal Navy. |
| 13 May | United Kingdom | | Woolwich Dockyard | Barracouta | Cherokee-class brig-sloop | For Royal Navy. |
| 17 May | France | | Bayonne | La Béarnaise | Iris-class schooner | For French Navy. |
| 24 May | Russia | A. I. Melikhov | Nicholaieff | Ganimed | Brig | For Imperial Russian Navy. |
| 24 May | Russia | A. I. Melikhov | Nicholaieff | Nord Adler | Third rate | For Imperial Russian Navy. |
| 30 May | United States | Henry Eckford | Brooklyn Navy Yard | Ohio | Third rate | For United States Navy. |
| 30 May | United Kingdom | | Portsmouth Dockyard | Prince Regent | Royal yacht | For George IV. |
| 31 May | France | | Bayonne | L'Hirondelle | Schooner | For French Navy. |
| 31 May | Russia | A. M. Kurohkin | Archangelsk | Merkurii | Spechnyi-class frigate | For Imperial Russian Navy. |
| May | United Kingdom | J. Hall | Sunderland | Albion | Brig | For Hall & Co. |
| May | United Kingdom | | | Industry | Schooner | For private owner. |
| 8 June | Russia | Y. A. Kolodkin | Lodeynoye Pole | Ladoga | Sloop | For Imperial Russian Navy. |
| 10 June | United Kingdom | | Pembroke Dockyard | Falcon | Cherokee-class brig-sloop | For Royal Navy. |
| 10 June | United Kingdom | | Pembroke Dockyard | Frolic | Cherokee-class brig-sloop | For Royal Navy. |
| 13 June | United Kingdom | Nicholas Diddams | Portsmouth | Minerva | Leda-class frigate | For Royal Navy. |
| 15 June | United Kingdom | | Portsmouth Dockyard | Minerva | Leda-class frigate | For Royal Navy. |
| 1 July | United Kingdom | James Tippett & Co. | Bristol | The Asia | Brig | For Mr. Scott. |
| 11 July | United Kingdom | Menzies | Leith | John Watson | Schooner | For private owner. |
| 11 July | United Kingdom | James Shepherd | Paull | Royal George | Merchantman | For Joseph Soames. |
| 26 July | United Kingdom | | Portsmouth Dockyard | Jasper | Cherokee-class brig-sloop | For Royal Navy. |
| 26 July | United Kingdom | George Parkin | Chatham Dockyard | Trafalgar | Second rate | For Royal Navy. |
| 27 July | United Kingdom | | Carmarthen | David Walter | Brig | For private owner. |
| 27 July | United Kingdom | George Llewelling | Swansea | Villers | Brig | For private owner. |
| 28 July | United Kingdom | | Deptford Dockyard | Ariel | Cherokee-class brig-sloop | For Royal Navy. |
| 10 August | United Kingdom | William Stone | Deptford Dockyard | Venus | Leda-class frigate | For Royal Navy. |
| 18 August | United Kingdom | Edward Churchill | Pembroke Dockyard | Melampus | Modified Leda-class frigate | For Royal Navy. |
| 24 August | United Kingdom | | Portsmouth | Britomart | Cherokee-class brig-sloop | For Royal Navy. |
| 25 August | France | | Lorient | Jean Bart | Téméraire-class ship of the line | For French Navy. |
| 7 September | United States | William Doughty | Philadelphia Navy Yard | North Carolina | Ship of the line | For United States Navy. |
| 16 September | United Kingdom | Hilhouse & Co. | Wapping | Feliza | Full-rigged ship | For private owner. |
| 5 October | United Kingdom | B. F. Stoke | Saint Petersburg | Sviatoi Lavrentii | Aiaks-class sloop | For Imperial Russian Navy. |
| 19 October | United Kingdom | William Patrick | Mirfield | Hopewell | Sloop | For private owner. |
| 20 October | United Kingdom | | Devonport Dockyard | Britannia | Caledonia-class ship of the line | For Royal Navy. |
| 21 October | United Kingdom | | Norfolk Navy Yard | Delaware | North Carolina-class ship of the line | For United States Navy. |
| 21 October | Russia | B. F. Stoke | Saint Petersburg | Provornyi | Spechnyi-class frigate | For Imperial Russian Navy. |
| 24 October | United Kingdom | William Simons & Co. | Greenock | Wilberforce | East Indiaman | For John Robertson. |
| October | United Kingdom | William Symons | Little Falmouth | Marquis of Salisbury | Packet ship | For Post Office Packet Service |
| 2 November | United States | | Boston Navy Yard | Alligator | Schooner | For United States Navy. |
| 7 November | United Kingdom | | Annan | Henry Brougham | Sloop | For Messrs. Nicholson & Co. |
| 7 November | United Kingdom | William Stone | Deptford Dockyard | Southampton | Southampton-class frigate | For Royal Navy. |
| 27 November | United Kingdom | | Woolwich Dockyard | Niemen | Atholl-class corvette | For Royal Navy. |
| 29 November | United Kingdom | | Woolwich Dockyard | Atholl | Atholl-class corvette | For Royal Navy. |
| 5 December | United Kingdom | W. Smith & Co. | Newcastle upon Tyne | The Flotentia | East Indiaman | For private owner. |
| 6 December | United Kingdom | Wigram & Green | Blackwall | Kent | East Indiaman | For British East India Company. |
| 7 December | United Kingdom | | Woolwich Dockyard | Ranger | Atholl-class corvette | For Royal Navy. |
| Unknown date | United Kingdom | Horseley Ironworks | Tipton & London | Aaron Manby | Paddle steamer | For Aaron Manby. |
| Unknown date | France | | Dunkerque | Arend | Sixth rate | For Royal Netherlands Navy. |
| Unknown date | Netherlands | | | Betsy en Carolina | Unrated | For Royal Netherlands Navy. |
| Unknown date | United Kingdom | | Sunderland | Carley | Sloop | For private owner. |
| Unknown date | United States | | Baltimore, Maryland | Gata | Schooner | For private owner. |
| Unknown date | United Kingdom | | Sunderland | Helen | Merchantman | For Mr. Ballantyne. |
| Unknown date | United Kingdom | | Plymouth | Henry | Sloop | For H. Rowe. |
| Unknown date | United Kingdom | | Sunderland | Hinde | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Deptford | Hive | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Newcastle upon Tyne | Indefatigable | Packet boat | For private owner. |
| Unknown date | United Kingdom | | Whitehaven | Indian | Merchantman | For Woods & Co. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Johns | Snow | For John M. Gales. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Newby | Snow | For R. Scurfield. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Pauline | Snow | For John Grimshaw. |
| Unknown date | Ottoman Empire | | Constantinople | Peyk i Mesiret | Third rate | For Ottoman Navy. |
| Unknown date | United States | | Portsmouth Navy Yard | Porpoise | Schooner | For United States Navy. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Reaper | Brig | For John M. & William Gales. |
| Unknown date | United Kingdom | Blent | Rotherhithe | Rising Star | Paddle steamer | For Thomas Cochrane. |
| Unknown date | United Kingdom | | Sunderland | Sea Flower | Brig | For B. robson. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Sericca | Brig | For William Nicholson. |
| Unknown date | United Kingdom | | Milford Haven | Skylark | Cutter | For Board of Customs. |
| Unknown date | United Kingdom | Tiffin | Sunderland | Tarragona | Merchantman | For Mr. Tiffin. |
| Unknown date | United Kingdom | Philip Laing | Sunderland | Thisbe | Merchantman | For Philip Laing. |
| Unknown date | Russia | | Saint Petersburg | Uraniia | Malyi-class frigate | For Imperial Russian Navy. |
| Unknown date | India | | Bombay | Vigilant | Schooner | For British East India Company. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Vulcan | Snow | For Thomas Young. |