# List of ship launches in 1821

The list of ship launches in 1821 includes a chronological list of some ships launched in 1821.
| Date | Country | Builder | Location | Ship | Class | Notes |
| 9 January | France | | Brest | La Jeanne d'Arc | Jeanne d'Arc-class frigate | For French Navy. |
| 15 January | France | | Cherbourg | La Clorinde | Fourth rate | For French Navy. |
| 19 January | United Kingdom | James Lang | Dumbarton | Surprise | Steamship | For private owner. |
| 27 January | United Kingdom | Thomas White | Cowes | Ogle Castle | Merchantman | For Mr. Brown. |
| January | United Kingdom | Fishburn & Brodrick | Witby | Terrys | Full-rigged ship | For private owner. |
| 16 February | United Kingdom | R. & A. Carswell | Greenock | Mountaineer | Steamship | For private owner. |
| 3 March | Russia | A. I. Melikhov | Nicholaieff | Orfei | Brig | For Imperial Russian Navy. |
| 29 March | United Kingdom | India | Cochin | Alligator | Atholl-class corvette | For Royal Navy. |
| 4 April | United Kingdom | James Brown | Perth | Tourist | Steam yacht | For Leith and Aberdeen Steam Yacht Company. |
| 7 April | United Kingdom | Wigram & Green | Blackwall | City of Edinburgh | Paddle steamer | For private owner. |
| 19 April | United Kingdom | John Scott & Co. | Greenock | Majestic | Steamship | For Glasgow and Liverpool Steam Packet Company. |
| April | United Kingdom | John M. & William Gales | Sunderland | Lady Frances | Snow | For R. Scurfield & Co. |
| April | United Kingdom | | Macduff | Macduff | Sloop | For private owner. |
| 1 May | United Kingdom | William Denny | Dumbarton | Velocity | Steam yacht | For Aberdeen, Leith and Clyde Shipping Company. |
| 2 May | United Kingdom | Humble and Hurry | Liverpool | Ellen Mar | Full-rigged ship | For private owner. |
| 3 May | United Kingdom | Clarke and Dixon | Liverpool | Hardware | Brig | For private owner. |
| 3 May | United Kingdom | James | Liverpool | Pacific | Brig | For private owner. |
| 4 May | India | | Sulkea | Eleanor | Merchantman | For private owner. |
| 7 May | Russia | B. F. Stoke | Saint Petersburg | Apollon | Sloop | For Imperial Russian Navy. |
| 7 May | Russia | K. A. Glazyrin | Saint Petersburg | Riga | Sloop | For Imperial Russian Navy. |
| 8 May | United States | Sidney Wright | New York | James Cropper | Merchantman | For private owner. |
| 15 May | Russia | A. P. Antipev | Kazan | Baku | Brig | For Imperial Russian Navy. |
| 16 May | Russia | | Kazan | Muravei | Tender | For Imperial Russian Navy. |
| 17 May | United States | | Washington Navy Yard | Shark | Schooner | For United States Navy. |
| 18 May | Russia | A. M. Kurochkin | Archangelsk | Kreiser | Provornyi-class frigate | For Imperial Russian Navy. |
| 18 May | United Kingdom | | Portsmouth Dockyard | Martin | Martin-class sloop | For Royal Navy. |
| 18 May | Russia | A. M. Kurochkin | Archangelsk | Sviatoi Andrei | Selafail-class ship of the line | For Imperial Russian Navy. |
| 31 May | France | | Bayonne | La Lyonnaise | Iris-class schooner | For French Navy. |
| 31 May | United Kingdom | Cortney | Chester | The Liverpool | Full-rigged ship | For private owner. |
| May | United Kingdom | | | Hope | Schooner | For private owner. |
| 1 June | United Kingdom | | Plymouth Dockyard | Lyra | Cherokee-class brig-sloop | For Royal Navy. |
| 1 June | United Kingdom | | Portsmouth Dockyard | Rose | Sloop | For Royal Navy. |
| 2 June | United Kingdom | James Lang | Dumbarton | Brilliant | Steam yacht | For Leith and Aberdeen Steam Yacht Company. |
| 9 June | United Kingdom | Richards | Hythe | Highland Lassy | Yacht | For General Mackenzie. |
| 14 June | France | | Bayonne | La Provencale | Iris-class schooner | For French Navy. |
| 16 June | United Kingdom | George Parkin | Chatham Dockyard | Latona | Leda-class frigate | For Royal Navy. |
| 17 June | United Kingdom | Menzies & Son | Leith | Queen Margaret | Steamship | For private owner. |
| 18 June | United Kingdom | J. Wood & Co. | Port Glasgow | James Watt | Paddle steamer | For London and Edinburgh Steam Packet Company. |
| 20 June | United Kingdom | R. Steele & Son | Greenock | Eclipse | Steamship | For Napier & Langtry. |
| 23 June | United States | | Philadelphia Navy Yard | Dolphin | Schooner | For United States Navy. |
| 25 June | Russia | A. I. Mekikhov | Kherson | Imperator Frants | First rate | For Imperial Russian Navy. |
| 29 June | United Kingdom | Smith | Eastham | Lady Stanley | Steamship | For private owner. |
| 30 June | United Kingdom | | Portsmouth Dockyard | Plover | Cherokee-class brig-sloop | For Royal Navy. |
| June | United Kingdom | | | Relief | Brig | For private owner. |
| 1 July | France | | Bresst | L'Amazone | Jeanne d'Arc-class frigate | For French Navy. |
| 17 July | United Kingdom | Buckle and Davies | Chepstow | Edward Protheroe | Merchantman | For private owner. |
| 20 July | United Kingdom | | Pembroke Dockyard | Nereus | Modified Leda-class frigate | For Royal Navy. |
| 31 July | United Kingdom | | Deptford Dockyard | Woodlark | Quail-class schooner | For Royal Navy. |
| 7 August | Russia | I. Y. Osminin | Sevastopol | Sokol | Cutter | For Imperial Russian Navy. |
| 11 August | Russia | B. F. Stoke | Saint Petersburg | Alexander Nevskii | Provornyi-class frigate | For Imperial Russian Navy. |
| 15 August | United Kingdom | Francis Symons | Falmouth | George the Fourth | Packet ship | For private owner. |
| 27 August | Netherlands | | Amsterdam | Algiers | Frigate | For Royal Netherlands Navy. |
| 28 August | France | | Cherbourg | La Pomone | Pomone-class corvette | For French Navy. |
| 29 August | United Kingdom | Sandon | Stourport-on-Severn | Sovereign | Steam yacht | For Captain Sandon. |
| August | United Kingdom | Philip Laing | Sunderland | Cecrops | Full-rigged ship | For Fletcher Bros. |
| August | United States | | Washington Navy Yard | Grampus | Schooner | For Royal Navy. |
| 11 September | United Kingdom | | Harwich | Essex | Lifeboat | For Harwich Lifeboat Company. |
| 13 September | United Kingdom | Jabez Bayley | Ipswich | Sir David Scott | East Indiaman | For British East India Company. |
| 27 September | United Kingdom | Jabez Bayley | Ipswich | William Fairlie | East Indiaman | For British East India Company. |
| 11 October | United Kingdom | Charles David Gordon | Deptford | Berwickshire | East Indiaman | For British East India Company. |
| 12 October | United Kingdom | | Portsmouth Dockyard | Ferret | Cherokee-class brig-sloop | For Royal Navy. |
| 13 October | United Kingdom | Brindley | Frindsbury | Macqueen | East Indiaman | For British East India Company. |
| 18 October | United States | | New York | William Tell | Merchantman | For Samuel Hicks. |
| 26 October | United Kingdom | | Pembroke Dockyard | Reynard | Cherokee-class brig-sloop | For Royal Navy. |
| 28 October | Russia | B. F. Stoke | Saint Petersburg | Okhtenka | Aiaks-class sloop | For Imperial Russian Navy. |
| 30 October | India | J. Thomas | Howrah | Recovery | Merchantman | For private owner. |
| 31 October | United Kingdom | India | Calcutta | Calder | Brig | For Barretto & Sons. |
| October | United Kingdom | W. Wake | Sunderland | Storey | Schooner | For private owner |
| 2 November | Russia | A. I. Melikhov | Nicholaieff | Pospeshnyi | Fourth rate | For Imperial Russian Navy. |
| 10 November | United Kingdom | Money Wigram | Blackwall Yard | Duchess of Athol | East Indiaman | For British East India Company. |
| 10 November | India | Jamsetjee Bomanjee Wadia | Bombay Dockyard | Ganges | Canopus-class ship of the line | For Royal Navy. |
| 14 November | United Kingdom | Ritchie and Laine | Lough Neagh | Marchioness of Donegall | Steamship | For private owner. |
| November | United Kingdom | L. Crown | Sunderland | Erato | Merchantman | For Blair & Co.. |
| 11 December | India | John Scott & Co. | Calcutta | Nimrod | Merchantman | For John Scott & Co. |
| 11 December | United Kingdom | | Sheerness Dockyard | Opossum | Cherokee-class brig-sloop | For Royal Navy. |
| 22 December | United States | | New York | Columbia | Merchantman | For private owner. |
| 25 December | United States | Smith, Blossom, and Denman | New York | Florida | Merchantman | For private owner. |
| Unknown date | United Kingdom | Aaron Manby | Tipton and Rotherhithe | Aaron Manby | Paddle steamer | For Charles Napier. |
| Unknown date | United Kingdom | R. Spearman | Sunderland | Albany | Schooner | For private owner. |
| Unknown date | India | | Bombay | Bombay | Gunboat | For British East India Company. |
| Unknown date | Unknown | | | City of Kingston | Schooner | For private owner. |
| Unknown date | United Kingdom | T. Brocklebank | Deptford | Eagle | Paddle steamer | For C. Bell, T. Brocklebank and others. |
| Unknown date | United Kingdom | | Newcastle upon Tyne | Florentia | Full-rigged ship | For British East India Company. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Ford | Snow | For Thomas Allen. |
| Unknown date | India | | Bombay | Hastings | Frigate | For British East India Company. |
| Unknown date | Netherlands | | Rotterdam | Hekla | Sixth rate | For Royal Netherlands Navy. |
| Unknown date | United Kingdom | J. Bankham | Frindsbury | Hero | Paddle steamer | For W. Cawthorn, R. Cheeswright, J. Pearson & others. |
| Unknown date | Netherlands | | Rotterdam | Kemphaan | Full-rigged ship | For Royal Netherlands Navy. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Lady Louisa | Snow | For John M. & William Gales. |
| Unknown date | United Kingdom | Elias Evans | Frindsbury | Lightning | Paddle steamer | For private owner. |
| Unknown date | United Kingdom | Elias Evans | Frindsbury | Medusa | Paddle steamer | For private owner. |
| Unknown date | United Kingdom | Elias Evans | Frindsbury | Meteor | Paddle steamer | For private owner. |
| Unknown date | United Kingdom | Mr. Evans | Rotherhithe | Monkey | Paddle tug | For Royal Navy. |
| Unknown date | United Kingdom | Philip Laing | Sunderland | Nepos | Merchantman | For Trader & Co. |
| Unknown date | France | | Dunkerque | Pellikaan | Full-rigged ship | For Royal Netherlands Navy. |
| Unknown date | United States | | Rochester, Massachusetts | Phoenix | Whaler | For private owner. |
| Unknown date | United Kingdom | | Falmouth | Prince Regent | Packet ship | For Post Office Packet Service. |
| Unknown date | Netherlands | | Rotterdam | Proserpina | Sixth rate | For Royal Netherlands Navy. |
| Unknown date | United Kingdom | T. Burn | Sunderland | Rose | Brig | For G. Hogg. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Sisters | Snow | For John M. & William Gales. |
| Unknown date | United Kingdom | | Southwick | Susan | Merchantman | For private owner. |
| Unknown date | United Kingdom | W. Adamson | Sunderland | Sylph | brig | For W. Adamson. |
| date | United Kingdom | builder | location | Error: {{SS}} missing name (help) | Steamship | For . |
| Unknown date | United Kingdom | Elias Evans | Frindsbury | Union | Paddle steamer | For private owner. |
| Unknown date | United Kingdom | John M. & William Gales | Sunderland | Vasic | Snow | For R. Scurfield |
| Unknown date | United Kingdom | Philip Laing | Sunderland | Zeno | Merchantman | For Mr. Murray. |