The list of ship launches in 1981 includes a chronological list of all ships launched in 1981. 
     | Date  |  Country  |  Builder  |  Location  |  Ship  |  Class / type  |  Notes  | 
  | 28 January  |    West Germany  |  Howaldtswerke-Deutsche Werft  |  Kiel  |  Frankfurt Express  |  Container ship  |  For Hapag-Lloyd  | 
  | 6 February  |    Poland  |  Stocznia Szczecinska im Adolfa Warskiego Warskiego  |  Szczecin  |  Lev Tolstoy  |  Dmitriy Shostakovich-class ferry  |  For Black Sea Shipping Company.[1]  | 
  | 7 February  |    United States  |  Todd Pacific Shipyards  |  San Pedro, California  |  Mahlon S. Tisdale  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 10 February  |    Japan  |    |    |  Setoshio  |  Yūshio-class submarine  |  For Japanese Navy.  | 
  | 6 March  |    United Kingdom  |  Appledore Shipbuilders Ltd.  |  Appledore  |  City of Oxford  |  Container ship  |  For Ellerman Lines Ltd.[3]  | 
  | 9 March  |    United Kingdom  |  Brooke Marine Ltd.  |  Lowestoft  |  Arromanches  |  Landing craft  |  For British Army.[4]  | 
  | 20 March  |    Japan  |  Koyo Dockyard  |  Mihara, Japan  |  Harbel Tapper  |  Bulk carrier  |    | 
  | 21 March  |    United States  |  Newport News Shipbuilding  |  Newport News, Virginia  |  Houston  |  Los Angeles-class submarine  |  For United States Navy.  | 
  | 21 March  |    United Kingdom  |  Harland & Wolff  |  Belfast  |  Isomeria  |  LPG carrier  |  For Shell Tankers Ltd.[6]  | 
  | 28 March  |    West Germany  |  Blohm + Voss  |  Hamburg  |  Almirante Brown  |  Almirante Brown-class destroyer  |  For Argentine Navy.  | 
  | 4 April  |    United States  |  Bath Iron Works  |  Bath, Maine  |  Stephen W. Groves  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 14 April  |    United Kingdom  |  Brooke Marine Ltd.  |  Lowestoft  |  Trident  |  Patrol boat  |  For Barbados Defence Force.[7]  | 
  | 17 April  |    Poland  |  Stocznia Szczecinska im Adolfa Warskiego Warskiego  |  Szczecin  |  Konstantin Simonov  |  Dmitriy Shostakovich-class ferry  |  For Baltic Sea Shipping Company.[8]  | 
  | 25 April  |    United States  |  Electric Boat  |  Groton, Connecticut  |  City of Corpus Christi  |  Los Angeles-class submarine  |  For United States Navy.  | 
  | 25 April  |    United States  |  Ingalls Shipbuilding  |  Pascagoula, Mississippi  |  Ticonderoga  |  Ticonderoga-class cruiser  |  For United States Navy.  | 
  | 30 April  |    Soviet Union  |  Werft 340  |  Selenodolsk  |  SKR-35  |  Koni-class frigate  |  For Soviet Navy.  | 
  | 14 May  |    Denmark  |  Frederikshavn Vaerft  |  Frederikshavn  |  Mercandian Merchant II  |  Type FV 610 RoRo-ship  |  For Per Henriksen.[10]  | 
  | 16 May  |    Netherlands  |  Koninklijke Schelde Groep  |  Flushing  |  Abraham Crijnssen  |  Kortenaer-class frigate  |  For Royal Netherlands Navy.  | 
  | 16 May  |    Netherlands  |  Koninklijke Schelde Groep  |  Flushing  |  Jan van Brakel  |  Kortenaer-class frigate  |  For Royal Netherlands Navy.  | 
  | 19 May  |    United Kingdom  |  Brooke Marine Ltd.  |  Lowestoft  |  Antwerp  |  Landing craft  |  For British Army.[11]  | 
  | 19 May  |    Sweden  |  Öresundsvarvet  |  Landskrona  |  Trelleborg  |  Ferry  |  For Statens Järnvägars Färjedrift.[12]  | 
  | 19 May  |    West Germany  |  Howaldtswerke-Deutsche Werft  |  Kiel  |  Pisagua  |  Type 209 submarine  |  For Peruvian Navy.  | 
  | 22 May  |    Sweden  |  Götaverken  |  Gothenburg  |  GV 909  |  Cruiseferry  |  Ordered by Sessan Linjen, order cancelled before delivery  | 
  | 22 May  |    West Germany  |  AG Weser  |  Bremen  |  St. Michaelis  |  Tanker  |  For Hamburg Süd.[13]  | 
  | 29 May  |    West Germany  |  Blohm + Voss  |  Hamburg  |  Köln  |  Bremen-class frigate  |  For German Navy.  | 
  | 2 June  |    United Kingdom  |  Swan Hunter  |  Wallsend, England  |  Ark Royal  |  Invincible-class aircraft carrier  |  For Royal Navy.  | 
  | 5 June  |    United Kingdom  |  Appledore Shipbuilders Ltd.  |  Appledore  |  Saint George  |  Stores carrier  |  For British Army.[14]  | 
  | 17 June  |    United Kingdom  |  Yarrow Shipbuilders  |  Glasgow, Scotland  |  Boxer  |  Type 22 frigate  |  For Royal Navy.  | 
  | 27 June  |    United States  |  Todd Pacific Shipyards  |  San Pedro, California  |  Reid  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 1 July  |    United Kingdom  |    |    |  Trafalgar  |  Trafalgar-class submarine  |  For Royal Navy.  | 
  | 2 July  |    United States  |  Todd Pacific Shipyards  |  Seattle, Washington  |  Crommelin  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 18 July  |    United States  |  Avondale Shipyard  |  Avondale, Louisiana  |  Willamette  |  Cimarron-class fleet replenishment oiler  |  For United States Navy.  | 
  | 24 July  |    United States  |  Bath Iron Works  |  Bath, Maine  |  John L. Hall  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 4 August  |    Japan  |    |    |  Shirayuki  |  Hatsuyuki-class destroyer  |  For Japanese Navy.  | 
  | 22 August  |    Poland  |  Stocznia im Lenina  |  Gdańsk  |  Stena Germanica  |  Ferry  |  For Stena Line.[15]  | 
  | 23 August  |    Soviet Union  |  Leninsky Komsomol Shipyard  |  Komsomolsk-on-Amur  |  Chita  |  Kilo-class submarine  |  For Soviet Navy.[16]  | 
  | 4 September  |    Denmark  |  Frederikshavn Vaerft  |  Frederikshavn  |  Mercandian Supplier II  |  type FV 610 RoRo-ship  |  For Mercandia rederiet A/S.[17]  | 
  | 25 September  |    West Germany  |  Blohm + Voss  |  Hamburg  |  La Argentina  |  Almirante Brown-class destroyer  |  For Argentine Navy.  | 
  | 10 October  |    France  |  Dubigeon-Normandie  |  Nantes  |  Scandinavia  |  Cruiseferry  |  For Scandinavian World Cruises.  | 
  | 13 October  |    United States  |  Todd Pacific Shipyards  |  Seattle, Washington  |  Halyburton  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 16 October  |    United Kingdom  |  Appledore Shipbuilders Ltd.  |  Appledore  |  Wimpey Seahorse  |  Offshore supply vessel  |  For Wimpey Marine Ltd.[18]  | 
  | 17 October  |    United States  |  Bath Iron Works  |  Bath, Maine  |  Aubrey Fitch  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 17 October  |    United States  |  Todd Pacific Shipyards  |  San Pedro, California  |  Jarrett  |  Oliver Hazard Perry-class frigate  |  For United States Navy.  | 
  | 19 October  |    West Germany  |  Howaldtswerke-Deutsche Werft  |  Kiel  |  Blume  |  Type 209 submarine  |  For Peruvian Navy.  | 
  | 31 October  |    United States  |  Newport News Shipbuilding  |  Newport News, Virginia  |  Norfolk  |  Los Angeles-class submarine  |  For United States Navy.  | 
  | 14 November  |    United States  |  Electric Boat  |  Groton, Connecticut  |  Florida  |  Ohio-class submarine  |  For United States Navy.  | 
  | 17 November  |    France  |    |    |  Jean de Vienne  |  Georges Leygues-class frigate  |  For French Navy.  | 
  | 26 November  |    Finland  |  Wärtsilä Helsinki Shipyard  |  Helsinki  |  Song of America  |  Cruise ship  |  For Royal Caribbean International.  | 
  | 5 December  |    West Germany  |  AG Weser Seebeckswerft  |  Bremerhaven  |  Olau Britannia  |  Cruiseferry  |  For Olau Line.  | 
  | 22 December  |    Denmark  |  Frederikshavn Vaerft  |  Frederikshavn  |  Mercandian Importer III  |  Type FV 610 RoRo-ship  |  For Per Henriksen.[20]  | 
  | 24 December  |    Soviet Union  |  Werft 340  |  Selenodolsk  |  SKR 481  |  Koni-class frigate  |  For Soviet Navy.  | 
  | Date unknown  |    United Kingdom  |  David Abels Boatbuilders Ltd.  |  Bristol  |  Fashion of Bristol  |  Ferry  |  For private owner.[21]  | 
  | Date unknown  |    United Kingdom  |  David Abels Boatbuilders Ltd.  |  Bristol  |  Jacqueline D  |  Passenger launch  |  For private owner.[22]  | 
  | Date unknown  |    United Kingdom  |  David Abels Boatbuilders Ltd.  |  Bristol  |  Maria Mcloughlin  |  Tug  |  For John McLoughlin & Son (Shipping) Ltd.[23]  | 
  | Date unknown  |    United Kingdom  |  David Abels Boatbuilders Ltd.  |  Bristol  |  Sarah Mcloughlin  |  Tug  |  For John McLoughlin & Son (Shipping) Ltd.[24]  | 
  | Date unknown  |    United Kingdom  |  David Abels Boatbuilders Ltd.  |  Bristol  |  Steel Princess  |  Fishing vessel  |  For private owner.[25]  | 
 References
  - Sources
 
 - Couhat, Jean Labayle; Baker, A. D. III, eds. (1986). Combat Fleets of the World 1986/87. Annapolis, Maryland, USA: Naval Institute Press. ISBN 0-85368-860-5.