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.[1] | 
  | 24 January | .svg.png) India |  | Bombay | Cumbrian | Merchantman | For Bruce, Fawcett & Co. | 
  | 25 January |  United Kingdom | Perry | Blackwall | Europe | East Indiaman | For British East India Company.[2] | 
  | 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.[3] | 
  | 7 February |  United Kingdom | Perry | Blackwall | Essex | East Indiaman | For British East India Company. | 
  | 8 February | .svg.png) 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.[4] | 
  | February |  United Kingdom |  | Whitby | Brotherly Love's Increase | Merchantman | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Nercus | West Indiaman | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Neva | Merchantman | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Resolution | Whaler | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Robert and Ann | Collier | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Sally | Fishing vessel | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Sovereign | Merchantman | For private owner.[4] | 
  | February |  United Kingdom |  | Whitby | Visitor | collier | For private owner.[4] | 
  | 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.[5] | 
  | 23 April |  United Kingdom | Sir Henry Peake | Deptford Dockyard | Colossus | Colossus-class ship of the line | For Royal Navy.[6] | 
  | 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 | .svg.png) United States | William Price | Baltimore, Maryland | Vixen | Schooner | For United States Navy. | 
  | June |  United Kingdom | W. & J. Richards | Hythe | Cumberland | Merchantman | For private owner.[7] | 
  | June |  United Kingdom | W. Potts | Sunderland | Zephyrus | Brig | For private owner.[8] | 
  | 5 July |  United Kingdom |  | Bursledon | Tribune | Fifth rate | For Royal Navy.[9] | 
  | 13 July |  France | Arsenal de Toulon | Toulon | Bucentaure | Bucentaure-class ship of the line | For French Navy.[10] | 
  | 18 July |  France | Pierre Ozanne | Brest | Vétéran | Téméraire-class ship of the line | For French Navy.[11] | 
  | 20 July |  France | Mathurin Crucy | Nantes | Gloire | Frigate | For French Navy.[12] | 
  | 21 July |  United Kingdom | Barnard and Roberts | Deptford | Repulse | Repulse-class ship of the line | For Royal Navy.[13] | 
  | 26 July |  Denmark-Norway |  | Copenhagen | Christian VII | Second rate | For Dano-Norwegian Navy.[14] | 
  | July |  United Kingdom |  |  | Expedition | Full-rigged ship | For private owner.[15] | 
  | July |  United Kingdom |  | Lympstone | Isla | Brig | For private owner.[16] | 
  | 6 August | .svg.png) India | Hudson, Bacon & Co. | Calcutta | Suffolk | Merchantman | For private owner. | 
  | 6 August | .svg.png) 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.[17] | 
  | 15 August |  France |  | Toulon | Neptune | Bucentaure-class ship of the line | For French Navy.[18] | 
  | 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 | .svg.png) United States | Edmund Hartt | Boston, Massachusetts | Argus | Brig | For United States Navy. | 
  | August |  United Kingdom |  |  | Harmony | Brigantine | For private owner.[19] | 
  | 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.[20] | 
  | 24 September |  France | Pierre Ozanne | Brest | Cassard | Third rate | For French Navy.[21] | 
  | 24 September | .svg.png) India |  | Calcutta | Matilda | Merchantman | For private owner. | 
  | 1 October | .svg.png) 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.[22] | 
  | 6 October |  United Kingdom | Simon Temple Jr. | South Shields | Indus | Merchantman | For private owner. | 
  | 13 October | .svg.png) 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.[23] | 
  | 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.[24] | 
  | October |  Batavian Republic |  | Vlissingen | Aurora | Frigate | For Batavian Navy.[25] | 
  | 14 November |  Batavian Republic |  | Amsterdam | Iris | Frigate | For Batavian Navy.[26][27] | 
  | 14 November |  Batavian Republic |  | Amsterdam | Orpheus | Fifth rate | For Dutch Navy.[28][27] | 
  | 15 November |  France | Antoine Geoffroy | Lorient | Hermione | Fifth rate | For French Navy. | 
  | 30 November | .svg.png) India |  | Bombay | James Sibbald | Merchantman | For private owner. | 
  | 31 December |  United Kingdom | John Scott and Sons | Greenock | Elisabeth | Merchantman | For Messrs. Stirling, Gordon & Co.[29] | 
  | December |  United Kingdom |  | Southwold | Name unknown | Brigantine | For private owner.[30] | 
  | Unknown date |  United Kingdom |  | Peterhead | Active | Brigantine | For private owner.[31] | 
  | Unknown date |  France |  | Dieppe | Adolphe | Lugger | For M. Merlin-Dubreuil. | 
  | Unknown date |  France |  |  | Adventure | Privateer | For private owner. | 
  | Unknown date | .svg.png) 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.[8] | 
  | 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 | .svg.png) India |  | Chittagong | Betsey | Merchantman | For Hogur & Co. | 
  | Unknown date |  Batavian Republic |  |  | Bloys | Full-rigged ship | For Batavian Navy.[32] | 
  | Unknown date |  Batavian Republic |  |  | Brakel | Full-rigged ship | For Batavian Navy.[33] | 
  | Unknown date |  United Kingdom | J. Laing | Sunderland | Britannia | Merchantman | For private owner.[8] | 
  | 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.[34] | 
  | Unknown date | .svg.png) India |  | Bombay | Cambrian | Full-rigged ship | For private owner.[35] | 
  | Unknown date |  United Kingdom | Francis Hurry | Howdon | Cambridge | Merchantman | For Lord Camelford. | 
  | Unknown date | .svg.png) 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.[36] | 
  | Unknown date |  Batavian Republic |  |  | Das | Full-rigged ship | For Batavian Navy.[37] | 
  | 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.[38] | 
  | Unknown date |  Batavian Republic |  |  | De Haan | Full-rigged ship | For Batavian Navy.[39] | 
  | Unknown date |  Batavian Republic |  |  | De Haas | Full-rigged ship | For Batavian Navy.[40] | 
  | Unknown date |  Batavian Republic |  |  | De Liefde | Full-rigged ship | For Batavian Navy.[41] | 
  | Unknown date |  France |  |  | Déterminé | Brig | For private owner. | 
  | Unknown date |  United Kingdom | John Brockbank | Lancaster | Eliza | Merchantman | For private owner.[42] | 
  | Unknown date | .svg.png) India |  | Bombay | Estombole | Full-rigged ship | For private owner.[35] | 
  | Unknown date |  Batavian Republic |  |  | Evertsen | Full-rigged ship | For Batavian Navy.[43] | 
  | Unknown date | .svg.png) India | Matthew Smith | Calcutta | Fame | Merchantman | For private owner. | 
  | Unknown date |  United Kingdom | Nicholas Bools & William Good | Bridport | Fame | Sloop | For Mr. Bell.[44] | 
  | Unknown date |  United Kingdom | Nicholas Bools & William Good | Bridport | Forth | Snow | For Leith Shipping Co.[45] | 
  | 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.[46] | 
  | Unknown date |  United Kingdom | John Brockbank | Lancaster | Holland | Merchantman | For private owner.[47] | 
  | Unknown date |  Batavian Republic |  |  | Hulst | Full-rigged ship | For Batavian Navy.[48] | 
  | 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.[49] | 
  | Unknown date |  United Kingdom | Nicholas Bools & William Good | Bridport | Lady Nepean | Cutter | For Gibbs & Co.[50] | 
  | Unknown date |  France | Jean-Baptiste Collet | Saint-Servan | Le Courrier de Terre Neuve | Privateer | For private owner.[51] | 
  | Unknown date | .svg.png) 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.[52][53] | 
  | Unknown date | .svg.png) Ottoman Empire |  |  | Mansuriye | Third rate | For Ottoman Navy.[54] | 
  | 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.[55] | 
  | Unknown date |  United Kingdom | builder | Sunderland | Œconomy | Merchantman | For private owner.[8] | 
  | Unknown date |  United Kingdom | John Brockbank | Lancaster | Otter | Merchantman | For private owner.[56] | 
  | Unknown date |  United Kingdom |  | Howdon Pans | Oxford | Collier | For private owner. | 
  | Unknown date | .svg.png) India |  | Bombay | Pack-Horse | Luggage boat | For British East India Company.[35] | 
  | Unknown date | .svg.png) 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.[57] | 
  | Unknown date |  Batavian Republic |  |  | Reynst | Full-rigged ship | For Batavian Navy.[58] | 
  | Unknown date |  Batavian Republic |  |  | Roemer Vlack | Full-rigged ship | For Batavian Navy.[59] | 
  | 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.[60] | 
  | Unknown date |  Batavian Republic |  |  | Schrijver | Full-rigged ship | For Batavian Navy.[61] | 
  | Unknown date | .svg.png) India |  | Calcutta | Sir William Burroughs | Merchantman | For private owner. | 
  | Unknown date |  Batavian Republic |  |  | Staghouwer | Full-rigged ship | For Batavian Navy.[62] | 
  | Unknown date | .svg.png) Ottoman Greece |  | Rhodes | Tevfiknüma | Second rate | For Ottoman Navy.[63] | 
  | 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.[64] | 
  | Unknown date |  United Kingdom |  | Sunderland | Thomas | Schooner | For private owner.[8] | 
  | Unknown date |  United Kingdom | John & Philip Laing | Sunderland | Thomas & Anne | Merchantman | For Mr. Matthews.[8] | 
  | Unknown date |  Batavian Republic |  |  | Tjerk Hiddes de Vries | Full-rigged ship | For Batavian Navy.[65] | 
  | Unknown date |  United Kingdom |  | Belfast | Trial | Coaster | For private owner. | 
  | Unknown date |  Batavian Republic |  |  | Triton | Full-rigged ship | For Batavian Navy.[66] | 
  | Unknown date |  Batavian Republic |  |  | Tromp | Full-rigged ship | For Batavian Navy.[67] | 
  | Unknown date |  United Kingdom | Robert Newman | Dartmouth | Two Uncles | Schooner | For private owner.[68] | 
  | 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.[8] | 
  | Unknown date |  Batavian Republic |  |  | Van Der Does | Full-rigged ship | For Batavian Navy.[69] | 
  | Unknown date |  Batavian Republic |  |  | Van Gendt | Full-rigged ship | For Batavian Navy.[70] | 
  | Unknown date |  Batavian Republic |  |  | Van Nes | Full-rigged ship | For Batavian Navy.[71] | 
  | Unknown date |  Batavian Republic |  |  | Vlug | Full-rigged ship | For Batavian Navy.[72] | 
  | Unknown date |  United Kingdom |  | South Shields | Volunteer | Merchantman | For private owner. | 
  | Unknown date |  Batavian Republic |  |  | Warmond | Full-rigged ship | For Batavian Navy.[73] | 
  | Unknown date |  Batavian Republic |  |  | Wassenaar | Full-rigged ship | For Batavian Navy.[74] | 
  | Unknown date |  United Kingdom |  | Liverpool | William Pitt | West Indiaman | For James Loughan. | 
  | Unknown date |  Batavian Republic |  |  | Witte Cornelisz | Full-rigged ship | For Batavian Navy.[75] | 
  | Unknown date |  France |  |  | Name unknown | Schooner | For private owner. | 
  | Unknown date | .svg.png) United States |  |  | Name unknown | Merchantman | For private owner. | 
  | Unknown date |  United Kingdom |  | Cowes | Name unknown | Merchantman | For private owner. | 
  | Unknown date | .svg.png) Spain |  |  | Name unknown | Merchantman | For private owner. | 
  | Unknown date |  Batavian Republic |  | Rotterdam | Name unknown | Merchantman | For private owner. | 
  | Unknown date | .svg.png) Spain |  |  | Name unknown | Merchantman | For private owner. | 
  | Unknown date |  United Kingdom |  | Hull | Name unknown | Merchantman | For private owner. | 
 References