# List of ship launches in 1803

The list of ship launches in 1803 includes a chronological list of some ships launched in 1803.
| Date | Country | Builder | Location | Ship | Class | Notes |
| 8 January | United Kingdom | Perry, Wells & Green | Blackwall | Huddart | East Indiaman | For British East India Company. |
| 8 January | United Kingdom | Randall | Rotherhithe | Lady Castlereagh | East Indiaman | For British East India Company. |
| 8 January | United Kingdom | Randall | Rotherhithe | Union | East Indiaman | For British East India Company. |
| 24 January | France | | Lorient | Brutus | Téméraire-class ship of the line | For French Navy. |
| 24 January | India | | Bombay | Cumbrian | Merchantman | For Bruce, Fawcett & Co. |
| 25 January | United Kingdom | Perry | Blackwall | Europe | East Indiaman | For British East India Company. |
| January | United Kingdom | John Allan | Glasgow | Charlotte Dundas | Paddle steamer | For William Symington. |
| 5 February | United Kingdom | Pitcher | Northfleet | Ceylon | East Indiaman | For British East India Company. |
| 7 February | United Kingdom | Perry | Blackwall | Essex | East Indiaman | For British East India Company. |
| 8 February | India | Hudson, Bacon & Co | Calcutta | Mangles | Merchantman | For Buckles & Co. |
| 8 February | United Kingdom | Peter Everitt Mestaer | Rotherhithe | Prince of Wales | East Indiaman | For British East India Company. |
| February | United Kingdom | | Whitby | Betsey and Sally | Fishing vessel | For private owner. |
| February | United Kingdom | | Whitby | Brotherly Love's Increase | Merchantman | For private owner. |
| February | United Kingdom | | Whitby | Nercus | West Indiaman | For private owner. |
| February | United Kingdom | | Whitby | Neva | Merchantman | For private owner. |
| February | United Kingdom | | Whitby | Resolution | Whaler | For private owner. |
| February | United Kingdom | | Whitby | Robert and Ann | Collier | For private owner. |
| February | United Kingdom | | Whitby | Sally | Fishing vessel | For private owner. |
| February | United Kingdom | | Whitby | Sovereign | Merchantman | For private owner. |
| February | United Kingdom | | Whitby | Visitor | collier | For private owner. |
| 9 March | United Kingdom | Dudman | Deptford | Lord Melville | East Indiaman | For British East India Company. |
| 22 April | United Kingdom | Grayson | Liverpool | Alexander | East Indiaman | For British East India Company. |
| 22 April | United Kingdom | Mr. Bradley | King's Lynn | Patent | Merchantman | For private owner. |
| 23 April | United Kingdom | Sir Henry Peake | Deptford Dockyard | Colossus | Colossus-class ship of the line | For Royal Navy. |
| 7 May | Russia | G. Ignatyev | Solombala Shipyard, Archangelsk | Liogkii | Speshni-class frigate | For Imperial Russian Navy. |
| 6 June | United Kingdom | Balthazar & Edward Adams | Bucklers Hard | Euryalus | Apollo-class frigate | For Royal Navy. |
| 7 June | United Kingdom | Francis Hurry & Co. | Newcastle upon Tyne | Euphrates | East Indiaman | For British East India Company. |
| 25 June | United States | William Price | Baltimore, Maryland | Vixen | Schooner | For United States Navy. |
| June | United Kingdom | W. & J. Richards | Hythe | Cumberland | Merchantman | For private owner. |
| June | United Kingdom | W. Potts | Sunderland | Zephyrus | Brig | For private owner. |
| 5 July | United Kingdom | | Bursledon | Tribune | Fifth rate | For Royal Navy. |
| 13 July | France | Arsenal de Toulon | Toulon | Bucentaure | Bucentaure-class ship of the line | For French Navy. |
| 18 July | France | Pierre Ozanne | Brest | Vétéran | Téméraire-class ship of the line | For French Navy. |
| 20 July | France | Mathurin Crucy | Nantes | Gloire | Frigate | For French Navy. |
| 21 July | United Kingdom | Barnard and Roberts | Deptford | Repulse | Repulse-class ship of the line | For Royal Navy. |
| 26 July | Denmark-Norway | | Copenhagen | Christian VII | Second rate | For Dano-Norwegian Navy. |
| July | United Kingdom | | | Expedition | Full-rigged ship | For private owner. |
| July | United Kingdom | | Lympstone | Isla | Brig | For private owner. |
| 6 August | India | Hudson, Bacon & Co. | Calcutta | Suffolk | Merchantman | For private owner. |
| 6 August | United States | Nathaniel Hutton | Philadelphia, Pennsylvania | Syren | Brig | For United States Navy. |
| 9 August | United Kingdom | | Thorpe St Andrew | Name unknown | Brig | For private owner. |
| 15 August | France | | Paris | La Parisienne | Gunboat | For French Navy. |
| 15 August | France | | Toulon | Neptune | Bucentaure-class ship of the line | For French Navy. |
| 18 August | United Kingdom | Perry | Blackwall | Hero | Fame-class ship of the line | For Royal Navy. |
| 18 August | France | | Rochefort | Magnanime | Téméraire-class ship of the line | For French Navy. |
| 21 August | United States | Edmund Hartt | Boston, Massachusetts | Argus | Brig | For United States Navy. |
| August | United Kingdom | | | Harmony | Brigantine | For private owner. |
| 2 September | United Kingdom | Josiah and Thomas Brindley | Frindsbury | Shannon | Perseverance-class frigate | For Royal Navy. |
| 3 September | United Kingdom | Randall & Brent | Rotherhithe | Illustrious | Fame-class ship of the line | For Royal Navy. |
| 17 September | France | Mathurin Crucy | Lorient | Suffren | Téméraire-class ship of the line | For French Navy. |
| 24 September | France | Pierre Ozanne | Brest | Cassard | Third rate | For French Navy. |
| 24 September | India | | Calcutta | Matilda | Merchantman | For private owner. |
| 1 October | India | Breen | Chittagong | Hebe | Full-rigged ship | For private owner. |
| 1 October | France | | Brest | Vengeur | Océan-class ship of the line | For French Navy. |
| 3 October | United Kingdom | Fletcher & Co. | Maryport | Name unknown | Merchantman | For private owner. |
| 6 October | United Kingdom | Simon Temple Jr. | South Shields | Indus | Merchantman | For private owner. |
| 13 October | Viceroyalty of Peru | | Guayaquil | Extremeña | Schooner | For Spanish Navy. |
| 15 October | United Kingdom | Perry, Wells & Green | Blackwall | Winchelsea | East Indiaman | For British East India Company. |
| 17 October | United Kingdom | John King | Dover | Scorpion | Cruizer-class brig-sloop | For Royal Navy. |
| 28 October | France | | Havre de Grâce | 338 | Pinnace | For French Navy. |
| 31 October | United Kingdom | Troughton | Chester | Lord Forbes | West Indiaman | For Forbes & Co. |
| 31 October | United Kingdom | R. Reay | South Hylton | Woodhouse | Merchantman | For Messrs. Terry & Sons. |
| October | Batavian Republic | | Vlissingen | Aurora | Frigate | For Batavian Navy. |
| 14 November | Batavian Republic | | Amsterdam | Iris | Frigate | For Batavian Navy. |
| 14 November | Batavian Republic | | Amsterdam | Orpheus | Fifth rate | For Dutch Navy. |
| 15 November | France | Antoine Geoffroy | Lorient | Hermione | Fifth rate | For French Navy. |
| 30 November | India | | Bombay | James Sibbald | Merchantman | For private owner. |
| 31 December | United Kingdom | John Scott and Sons | Greenock | Elisabeth | Merchantman | For Messrs. Stirling, Gordon & Co. |
| December | United Kingdom | | Southwold | Name unknown | Brigantine | For private owner. |
| Unknown date | United Kingdom | | Peterhead | Active | Brigantine | For private owner. |
| Unknown date | France | | Dieppe | Adolphe | Lugger | For M. Merlin-Dubreuil. |
| Unknown date | France | | | Adventure | Privateer | For private owner. |
| Unknown date | India | | Bombay | Alexander | Full-rigged ship | For Charles Forbes & Co. |
| Unknown date | France | | | Alsace | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Sunderland | Ann | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Cowes | Ariadne | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Cowes | Badger | Cutter | For Board of Customs. |
| Unknown date | Location unknown | | | Bedford | Merchantman | For private owner. |
| Unknown date | India | | Chittagong | Betsey | Merchantman | For Hogur & Co. |
| Unknown date | Batavian Republic | | | Bloys | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Brakel | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | J. Laing | Sunderland | Britannia | Merchantman | For private owner. |
| Unknown date | United Kingdom | Lockwood Brodrick | South Shield | British Tar | Merchantman | For T. Forrest. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Buccleuch | Ketch | For Liddle & Co. |
| Unknown date | India | | Bombay | Cambrian | Full-rigged ship | For private owner. |
| Unknown date | United Kingdom | Francis Hurry | Howdon | Cambridge | Merchantman | For Lord Camelford. |
| Unknown date | India | | Bombay | Charlotte | Merchantman | For Alex Adamson. |
| Unknown date | New South Wales | | Sydney | Charlotte | Sloop | For Robert Inch. |
| Unknown date | Lower Canada | Henry Baldwin | Quebec City | City of Edinburgh | Merchantman | For private owner. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Countess of Northesk | Smack | For James Johnson. |
| Unknown date | Batavian Republic | | | Das | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | Simon Temple | South Shields | Defence | Transport ship | For Mr. Duncan. |
| Unknown date | Batavian Republic | | | De Gelder | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | De Haan | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | De Haas | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | De Liefde | Full-rigged ship | For Batavian Navy. |
| Unknown date | France | | | Déterminé | Brig | For private owner. |
| Unknown date | United Kingdom | John Brockbank | Lancaster | Eliza | Merchantman | For private owner. |
| Unknown date | India | | Bombay | Estombole | Full-rigged ship | For private owner. |
| Unknown date | Batavian Republic | | | Evertsen | Full-rigged ship | For Batavian Navy. |
| Unknown date | India | Matthew Smith | Calcutta | Fame | Merchantman | For private owner. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Fame | Sloop | For Mr. Bell. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Forth | Snow | For Leith Shipping Co. |
| Unknown date | United Kingdom | Bools & Good | Bridport | Frisk | Cutter | For private owner. |
| Unknown date | New South Wales | Henry Kable & James Underwood | Sydney | Governor King | Schooner | For Henry Kable & James Underwood. |
| Unknown date | United Kingdom | | Broadstairs | Harriot | Merchantman | For private owner. |
| Unknown date | Batavian Republic | | | Heemskerck | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | John Brockbank | Lancaster | Holland | Merchantman | For private owner. |
| Unknown date | Batavian Republic | | | Hulst | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | Simon Temple Jr. | South Shields | Intrepid | Merchantman | For Simon Temple Jr. |
| Unknown date | United Kingdom | William Rowe | Newcastle upon Tyne | Jason | Ship-sloop | For W. Row. |
| Unknown date | Batavian Republic | | | Kemphaan | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Lady Nepean | Cutter | For Gibbs & Co. |
| Unknown date | France | Jean-Baptiste Collet | Saint-Servan | Le Courrier de Terre Neuve | Privateer | For private owner. |
| Unknown date | India | P. Tonks | Cochin | Lord Castlereagh | Merchantman | For Bruce, Fawcett & Co. |
| Unknown date | United Kingdom | | Lancaster | Macclesfield | Slave ship | For Mr. Taylor. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Mansfield | Smack or sloop | For Mr. Richardson. |
| Unknown date | Ottoman Empire | | | Mansuriye | Third rate | For Ottoman Navy. |
| Unknown date | New South Wales | Kable & Co | Hawkesbury River | Nancy | Sloop | For private owner. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Nepean | Cutter | For George Browne. |
| Unknown date | United Kingdom | builder | Sunderland | Œconomy | Merchantman | For private owner. |
| Unknown date | United Kingdom | John Brockbank | Lancaster | Otter | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Howdon Pans | Oxford | Collier | For private owner. |
| Unknown date | India | | Bombay | Pack-Horse | Luggage boat | For British East India Company. |
| Unknown date | United States | | Portsmouth, New Hampshire | Paragon | Merchantman | For private owner. |
| Unknown date | United Kingdom | | King's Lynn | Patent | Merchantman | For Mr. Gillespie. |
| Unknown date | France | | Dunkerque | Pieter Floriszoon | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Reynst | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Roemer Vlack | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | | Hull | Rosina | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Cowes | Royal George | Brig-sloop | For Board of Customs. |
| Unknown date | France | | Bordeaux | Saint Pierre | Slave ship | For private owner. |
| Unknown date | United Kingdom | | Liverpool | Sarah | Merchantman | For R. Kitchen. |
| Unknown date | Batavian Republic | | | Schram | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Schrijver | Full-rigged ship | For Batavian Navy. |
| Unknown date | India | | Calcutta | Sir William Burroughs | Merchantman | For private owner. |
| Unknown date | Batavian Republic | | | Staghouwer | Full-rigged ship | For Batavian Navy. |
| Unknown date | Ottoman Greece | | Rhodes | Tevfiknüma | Second rate | For Ottoman Navy. |
| Unknown date | United Kingdom | | River Thames | Thames | Collier | For private owner. |
| Unknown date | United Kingdom | Nicholas Bools & William Good | Bridport | Thames | Schooner | For Liddle & Co. |
| Unknown date | United Kingdom | | Sunderland | Thomas | Schooner | For private owner. |
| Unknown date | United Kingdom | John & Philip Laing | Sunderland | Thomas & Anne | Merchantman | For Mr. Matthews. |
| Unknown date | Batavian Republic | | | Tjerk Hiddes de Vries | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | | Belfast | Trial | Coaster | For private owner. |
| Unknown date | Batavian Republic | | | Triton | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Tromp | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | Robert Newman | Dartmouth | Two Uncles | Schooner | For private owner. |
| Unknown date | United Kingdom | Alexander Doeg | Gateshead | Tyne Packet | Schooner | For private owner. |
| Unknown date | United Kingdom | John & Philip Laing | Sunderland | Ulysses | Merchantman | For John & Philip Laing. |
| Unknown date | Batavian Republic | | | Van Der Does | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Van Gendt | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Van Nes | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Vlug | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | | South Shields | Volunteer | Merchantman | For private owner. |
| Unknown date | Batavian Republic | | | Warmond | Full-rigged ship | For Batavian Navy. |
| Unknown date | Batavian Republic | | | Wassenaar | Full-rigged ship | For Batavian Navy. |
| Unknown date | United Kingdom | | Liverpool | William Pitt | West Indiaman | For James Loughan. |
| Unknown date | Batavian Republic | | | Witte Cornelisz | Full-rigged ship | For Batavian Navy. |
| Unknown date | France | | | Name unknown | Schooner | For private owner. |
| Unknown date | United States | | | Name unknown | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Cowes | Name unknown | Merchantman | For private owner. |
| Unknown date | Spain | | | Name unknown | Merchantman | For private owner. |
| Unknown date | Batavian Republic | | Rotterdam | Name unknown | Merchantman | For private owner. |
| Unknown date | Spain | | | Name unknown | Merchantman | For private owner. |
| Unknown date | United Kingdom | | Hull | Name unknown | Merchantman | For private owner. |