The list of ship launches in 1920 includes a chronological list of ships launched in 1920. In cases where no official launching ceremony was held, the date built or completed may be used instead.
| Date | Country | Builder | Location | Ship | Class and type | Notes | |
|---|---|---|---|---|---|---|---|
| 12 January | Harland & Wolff | Belfast | Cargo ship | For Elder Dempster.[1] | |||
| 18 February |  United States | Pacific Coast Shipbuilding Company | Bay Point, California | Cargo ship | For United States Shipping Board[2] | ||
| 24 February | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy.[3] | |||
| February | I. J. Abdela & Mitchell Ltd. | Queensferry | Coaster | For John Summers & Sons Ltd.[4] | |||
| 3 March | Burntisland Shipbuilding Company | Burntisland, Fife | Cargo ship | For Compagnie Lasry | |||
| 6 March | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For Sociètè Navale Caennaise.[5] | |||
| 9 March | Mitsubishi | Kobe | Submarine No. 26 | Type L1 submarine | For Imperial Japanese Navy | ||
| 20 March | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy | |||
| 25 March | Werft Nobiskrug GmbH | Rendsburg | Fishing trawler | For Hochseefischerei Trave | |||
| 25 March | Harland & Wolff | Belfast | N-type cargo ship | For Elder Dempster.[6] | |||
| March | Vickers-Armstrongs Ltd. | Barrow-in-Furness | Cargo liner | For Cunard Line. | |||
| 7 April | Harland & Wolff | Belfast | Britmex No.6 | Oil barge | For British Mexican Petroleum Company.[7] | ||
| 7 April | Harland & Wolff | Belfast | Britmex No.7 | Oil barge | For British Mexican Petroleum Company.[8] | ||
| 15 April | Harland & Wolff | Belfast | Britmex No.2 | Oil barge | For British Mexican Petroleum Company.[9] | ||
| 15 April | Harland & Wolff | Belfast | Britmex No.3 | Oil barge | For British Mexican Petroleum Company.[10] | ||
| 15 April | Harland & Wolff | Belfast | Cargo ship | For Glen Line.[11] | |||
| 21 April | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy | |||
| 22 April | Harland & Wolff | Belfast | Britmex No.8 | Oil barge | For British Mexican Petroleum Company.[12] | ||
| 22 April | Harland & Wolff | Belfast | Cargo ship | For Bibby Steamship Co.[13] | |||
| 29 April | Harland & Wolff | Belfast | Britmex No.4 | Oil barge | For British Mexican Petroleum Company.[14] | ||
| 29 April | Harland & Wolff | Belfast | Britmex No.5 | Oil barge | For British Mexican Petroleum Company.[15] | ||
| April |  France | Société Nouvelle des Forges et Chantiers de la Méditerranée | La Seyne-sur-Mer | For French Navy | |||
| April | I. J. Abdela & Mitchell Ltd. | Queensferry | Coaster | For John Summers & Sons Ltd.[16] | |||
| 5 May | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy | |||
| 6 May | Harland & Wolff | Belfast | Cargo ship | For Pacific Steam Navigation Company.[17] | |||
| 7 May | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For G. Lamy & [18] | |||
| 5 June | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy | |||
| 10 June | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For Hijos de Astigarraga.[19] | |||
| 17 June | Harland & Wolff | Belfast | A-type cargo ship | For Lamport & Holt.[20] | |||
| 1 July | Harland & Wolff | Belfast | A-type cargo ship | For British Shipping Controller.[21] | |||
| 3 July | United States | Newport News Shipbuilding | Newport News, Virginia | For United States Navy | |||
| 6 July | Mitsubishi | Kobe | Submarine No. 27 | Type L2 submarine | For Imperial Japanese Navy | ||
| 13 July | Harland & Wolff | Govan | Tanker | For British Mexican Petroleum Company.[22] | |||
| 14 July | Harland & Wolff | Belfast | Cargo ship | For Glen Line.[23] | |||
| 17 July | I. J. Abdela & Mitchell Ltd. | Queensferry | Coaster | For Cornish Traders Ltd.[24] | |||
| 17 July | Sasebo Naval Arsenal | Sasebo | Submarine No. 43 | Kaichū III-type submarine | For Imperial Japanese Navy | ||
| 30 July | Lithgows | Port Glasgow | Tanker | For A/S Hvalen | |||
| 31 July | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For Fernand Bouet.[25] | |||
| 2 August | United States | Pacific Coast Shipbuilding Company | Bay Point, California | Cargo ship | For United States Shipping Board[26] | ||
| 26 August | Harland & Wolff | Belfast | Tanker | For British Mexican Petroleum Company.[27] | |||
| 27 August | Harland & Wolff | Belfast | Refrigerated cargo ship | For Elder Dempster.[28] | |||
| 9 September | Harland & Wolff | Govan | Tanker | For British Mexican Petroleum Company.[29] | |||
| 20 September | United States | J. F. Duthie & Company | Seattle, Washington | Cargo ship | For Universal Steamship & Barge Co. | ||
| 28 September | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For F. Sainz e Inchaustegui.[30] | |||
| 28 September | I. J. Abdela & Mitchell Ltd. | Queensferry | Coaster | For Moffat Steamship Co. Ltd.[31] | |||
| 30 September | Harland & Wolff | Belfast | Cargo ship | For Glen Line.[32] | |||
| 13 October | Northumberland Shipbuilding Co. Ltd. | Newcastle upon Tyne | Cargo ship | For Romney Steamship Co. Ltd. | |||
| 13 October | Mitsubishi | Kobe | Submarine No. 28 | Type L2 submarine | For Imperial Japanese Navy | ||
| 14 October | Harland & Wolff | Belfast | Cargo ship | For Pacific Steam Navigation Company.[33] | |||
| 14 October | Harland & Wolff | Belfast | Coaster | For Coast Lines.[34] | |||
| 14 October | Kure Naval Arsenal | Kure | Submarine No. 24 | Kaichū II-type submarine | For Imperial Japanese Navy | ||
| 26 October | Yokosuka Naval Arsenal | Yokosuka | Submarine No. 38 | Kaichū III-type submarine | For Imperial Japanese Navy | ||
| 26 October | Yokosuka Naval Arsenal | Yokosuka | Submarine No. 39 | Kaichū III-type submarine | For Imperial Japanese Navy | ||
| 28 October | Harland & Wolff | Belfast | B-type cargo ship | For Elder Dempster.[35] | |||
| 30 October | Harland & Wolff | Belfast | Britmex No.1 | Oil barge | For British Mexican Petroleum Company.[36] | ||
| 30 October | Harland & Wolff | Belfast | Britmex No.9 | Oil barge | For British Mexican Petroleum Company.[37] | ||
| 11 November | Harland & Wolff | Belfast | Pittsburgh | Ocean liner | For International Navigation Company.[38] | ||
| 25 November | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Cargo ship | For Fernand Bouet.[39] | |||
| 27 November | Harland & Wolff | Belfast | Passenger ship | For Peninsular & Oriental Steam Navigation Company.[40] | |||
| 29 November | Harland & Wolff | Belfast | Coaster | For Coast Lines.[41] | |||
| 14 December | United States | Todd Dry Dock and Construction Company | For United States Navy | ||||
| 15 December | United States | Northwest Bridge & Iron Company | Portland, Oregon | Tanker | For USSB/Swiftsure Oil Transport Co.[42] | ||
| 16 December | Harland & Wolff | Belfast | Britmex No.10 | Oil barge | For British Mexican Petroleum Company.[43] | ||
| 16 December | Harland & Wolff | Belfast | Passenger ship | For Pacific Steam Navigation Company.[44] | |||
| 20 December | Schiffbau-Gesellschaft Unterweser AG | Bremen | Coaster | For H Dauelsberg | |||
| 20 December | Harland & Wolff | Belfast | Coaster | For Coast Lines.[45] | |||
| 22 December | United States | Pacific Coast Shipbuilding Company | Bay Point, California | Cargo ship | For United States Shipping Board[46] | ||
| 23 December | Barclay Curle | Scotstoun | Passenger ship | For British India Steam Navigation Company | |||
| 23 December |  Denmark | Kjøbenhavns Flydedol & Skibsværft | Copenhagen | Cargo ship | For Det Bergenske Dampskibsselskab | ||
| 25 December | Harland & Wolff | Belfast | Cargo ship | For Glen Line.[47] | |||
| 28 December | Harland & Wolff | Belfast | Britmex No.11 | Oil barge | For British Mexican Petroleum Company.[48] | ||
| 28 December | Harland & Wolff | Belfast | Refrigerated cargo ship | For Elder Dempster.[49] | |||
| 28 December | Kure Naval Arsenal | Kure | Submarine No. 36 | Kaichū III-type submarine | For Imperial Japanese Navy | ||
| Unknown date | Ropner & Sons | Sunderland | Cargo ship | For private owner. | |||
| Unknown date | Societa per Azioni Ansaldo | Sestri Ponente | Cargo ship | For private owner. | |||
| Unknown date | Bushell Bros. | Tring | Tug | For London Haulage Co Ltd.[50] | |||
| Unknown date | United States | American International Shipbuilding, | Hog Island, Philadelphia, Pennsylvania | Hog Islander | For United States Shipping Board | ||
| Unknown date |  Canada | Canadian Vickers | Montreal | Refrigerated cargo ship | For Canadian National Steamships | ||
| Unknown date | Brown's Shipbuilding & Dry Dock Co. Ltd | Hull | Chimera | Steam drifter | For private owner.[51] | ||
| Unknown date | J. Blumer & Co. Ltd. | Sunderland | Cargo ship | For private owner. | |||
| Unknown date | W. Harkess & Sons Ltd. | Middlesbrough | Cargo ship | For Government of Nigeria. | |||
| Unknown date | Ardrossan Shipyard | Ardrossan | Coaster | For J Mulligan & Co. Ltd. | |||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Fogbreak | Fishing vessel | For Royal Navy, but completed as a commercial fishing vessel.[52] | ||
| Unknown date | Joh. C. Tecklenborg | Wesermünde | Cargo ship | For Hansa Line. | |||
| Unknown date | Ganz & Co | Rijeka | Passenger ship | For Jadranska Plovidba | |||
| Unknown date | Berthon Boat Co. Ltd | Lymington | Steam drifter | For Admiralty, completed as a commercial fishing vessel.[53] | |||
| Unknown date | Abdela & Mitchell Ltd. | Brimscombe | Lysaght Gull | Barge | For John Lysaght Ltd.[54] | ||
| Unknown date | Abdela & Mitchell Ltd. | Brimscombe | Lysaght Petrel | Barge | For John Lysaght Ltd.[55] | ||
| Unknown date | Berthon Boat Co. Ltd | Lymington | Maelstrom | Steam drifter | For Admiralty, completed as a commercial fishing vessel.[56] | ||
| Unknown date | J. W. Brooke & Co. Ltd. | Lowestoft | Moonset | Naval drifter | For Royal Navy but completed as a commercial fishing drifter.[57] | ||
| Unknown date | Vickers-Armstrongs Ltd. | Barrow-in-Furness | Tanker | For Anglo-American Oil Co. Ltd. | |||
| Unknown date | J. W. Brooke & Co. Ltd. | Lowestoft | Ocean Swell | Drifter | For private owner.[58] | ||
| Unknown date | Krupp | Emden | Cargo ship | For Rhederi AG von 1896 | |||
| Unknown date | J. W. Brooke & Co. Ltd. | Lowestoft | Outline | Drifter | For John W. Brooke, John W. M. Brooke and Adrian Lodge.[59] | ||
| Unknown date | J. W. Brooke & Co. Ltd. | Lowestoft | Puff | Drifter | For private owner.[60] | ||
| Unknown date | R. Duncan & Co. | Port Glasgow | Cargo ship | For Larrinaga Steamship Co. Ltd. | |||
| Unknown date | United States | Todd Dry Dock and Construction Company | Tacoma, Washington | Design 1914 ship | For United States Shipping Board | ||
| Unknown date | Earle's Shipbuilding Co. Ltd. | Hull | Cargo ship | For Ellerman's Wilson Line. | |||
| Unknown date | AG Weser | Bremen | Cargo ship | For Hansa Line. | |||
| Unknown date | Cargo ship | For United States Shipping Board. | |||||
| Unknown date | Submarine Boat Company. | Newark, New Jersey | Cargo ship | For United States Shipping Board. | |||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Steamship | For Isaac J. Abdela & Mitchell Ltd.[61] | |||
| Unknown date | United States | Atlantic Corporation | Portsmouth, New Hampshire | Design 1019 ship | For United States Shipping Board | ||
| Unknown date | Blohm & Voss. | Hamburg | Cargo ship | For Deutsche East Africa Line. | |||
| Unknown date | United States | Long Beach Shipbuilding | Long Beach, California | Design 1019 ship | For United States Shipping Board | ||
| Unknown date | J. W. Brooke & Co. Ltd. | Lowestoft | Williwaw | Naval drifter | For Royal Navy, but completed as a commercial drifter.[62] | ||
| Unknown date | Van Duivenijks Scheepswerft. | Lekkerkerk | Cargo ship | For private owner. | |||
| Unknown date | Cargo ship | For Rederi Transatlantic A/B. | |||||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Barge | For private owner.[63] | ||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Barge | For private owner.[64] | ||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Barge | For private owner.[65] | ||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Barge | For private owner.[66] | ||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Barge | For private owner.[67] | ||
| Unknown date | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Sternwheeler | For private owner.[68] |