| Date | Country | Builder | Location | Ship | Class / type | Notes |
| 6 January | United States | Moore Dry Dock Company | Oakland, California | Thordis | Cargo ship | For private owner.[1] |
| 11 January | United Kingdom | Harland & Wolff | Belfast | Lancashire | Passenger ship | For Bibby Steamship Co.[2] |
| 16 January | United States | Seattle Construction and Drydock Company | Seattle, Washington | N-2 | N-class submarine | For United States Navy.[3] |
| 18 January | United States | New York Shipbuilding | Camden, New Jersey | Tidewater | Collier | For Darrow-Mann Company.[4] |
| 20 January | United States | Alameda Works Shipyard | Alameda, California | Unnamed | Cargo ship | For H. S. Bjoeness.[5][6] |
| 20 January | United States | Alameda Works Shipyard | Alameda, California | Regulus | Cargo ship | For private owner.[5] |
| 23 January | United Kingdom | W. Harkness & Sons Ltd. | Middlesbrough | Flaminian | Cargo ship | For Ellerman & Papyanni Lines. |
| 24 January | United Kingdom | Hawthorn Leslie and Company | Hebburn | Calypso | C-class cruiser | For Royal Navy. |
| 25 January | United States | Newport News Shipbuilding | Newport News, Virginia | Mississippi | New Mexico-class battleship | For United States Navy. |
| 27 January | Japan | Mitsubishi Heavy Industries | Nagasaki | Hyūga | Ise-class battleship | For Imperial Japanese Navy. |
| 3 February | United Kingdom | Harland & Wolff | Govan | Skilful | Destroyer | For Royal Navy.[7] |
| 10 February | United Kingdom | Swan Hunter & Wigham Richardson | Wallsend | Torrid | R-class destroyer | For Royal Navy. |
| 21 February | United States | Seattle Construction and Drydock Company | Seattle, Washington | N-3 | N-class submarine | For United States Navy.[9] |
| 24 February | United Kingdom | J. Samuel White | Cowes | Tristram | R-class destroyer | For Royal Navy. |
| 3 March | Germany | AG Vulcan | Stettin | Wiesbaden | Cöln-class cruiser | For .Imperial German Navy |
| 8 March | United Kingdom | Harland & Wolff | Belfast | Minnekahda | Passenger ship | For Atlantic Transport Co.[11] |
| 8 March | United Kingdom | Hawthorn Leslie and Company | Hebburn | Thisbe | R-class destroyer | For Royal Navy. |
| 9 March | United Kingdom | Harland & Wolff | Govan | HMS Springbok | Destroyer | For Royal Navy. |
| 10 March | United Kingdom | John I. Thornycroft & Company | Southampton | Taurus | R-class destroyer | For Royal Navy. |
| 14 March | United States | Seattle Construction and Drydock Company | Seattle, Washington | Golden Gate | Cargo ship | For Knute Knutsen.[12] |
| 20 March | United Kingdom | Richardson, Duck & Co. Ltd. | Thornaby-on-Tees | Farnworth | Cargo ship | For R. S. Dalgleish Ltd. |
| 24 March | United Kingdom | John Brown & Company | Clydebank | Ceres | C-class cruiser | For Royal Navy. |
| 24 March | United Kingdom | Cammell Laird | Birkenhead | Valentine | V-class destroyer | For Royal Navy. |
| 31 March | United States | Northwest Steel | Portland, Oregon | Vesterlide | Cargo ship | [14] |
| 5 April | United Kingdom | Harland & Wolff | Belfast | Orca | Passenger ship | For Pacific Steam Navigation Company.[15] |
| 11 April | United States | Seattle Construction and Drydock Company | Seattle, Washington | Key West | Cargo ship | For Knute Knutsen. |
| 13 April | United States | New York Naval Shipyard | Brooklyn, New York | New Mexico | New Mexico-class battleship | For United States Navy. |
| 19 April | United Kingdom | Harland & Wolff | Govan | Regina | Passenger ship | For Dominion Line.[16] |
| 20 April | United Kingdom | Harland & Wolff | Govan | Tetrarch | Destroyer | For Royal Navy. |
| 21 April | United Kingdom | Harland & Wolff | Belfast | Melita | Passenger ship | For Canadian Pacific Railway. |
| 21 April | United Kingdom | John I. Thornycroft & Company | Southampton | Teazer | R-class destroyer | For Royal Navy. |
| 23 April | United States | Portsmouth Navy Yard | Portsmouth, New Hampshire | L-8 | L-class submarine | For United States Navy. |
| 25 April | Germany | Blohm + Voss | Hamburg | Dresden | Cöln-class cruiser | For Imperial German Navy. |
| 8 May | United Kingdom | William Denny and Brothers | Dumbarton | Valorous | V-class destroyer | For Royal Navy. |
| 15 May | United Kingdom | Pembroke Dockyard | Pembroke | Curacoa | C-class cruiser | For Royal Navy. |
| 17 May | United Kingdom | Harland & Wolff | Belfast | Glenavy | Cargo ship | For Glen Line.[18] |
| 19 May | United Kingdom | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Gaillardia | Aubretia-class sloop | For Royal Navy.[19] |
| 21 May | United Kingdom | Cammell Laird | Birkenhead | Stavangerfjord | Passenger ship | For Den Norske Amerikalinje.[20] |
| 21 May | United Kingdom | Harland & Wolff | Govan | Tenacious | Destroyer | For Royal Navy. |
| 21 May | United Kingdom | J. Samuel White | Cowes | Wallace | W-class Destroyer | For Royal Navy. |
| 22 May | United Kingdom | Cammell Laird | Birkenhead | Valhalla | V-class destroyer | For Royal Navy. |
| 25 May | United Kingdom | William Denny and Brothers | Dumbarton | Valkyrie | V-class destroyer | For Royal Navy. |
| 29 May | United States | Staten Island Shipbuilding Company | Port Richmond, New York | Snug Harbor | Cargo ship | Requisitioned by United States Shipping Board.[21] |
| 6 June | United States | Seattle Construction and Drydock Company | Seattle, Washington | Storviken | Cargo ship | For Haakon Wallen Co.[22] |
| 7 June | United Kingdom | Harland & Wolff | Govan | P62 | Patrol boat | For Royal Navy. |
| 14 June | United Kingdom | John Brown & Company | Clydebank | Vanoc | V-class destroyer | For Royal Navy. |
| 21 June | United Kingdom | Harland & Wolff | Belfast | War Shamrock | Cargo ship | For British Shipping Controller.[23] |
| 23 June | Germany | Blohm & Voss | Hamburg | Priwall | Barque | For F. Laeisz. |
| 30 June | United States | Camden, New Jersey | New York Shipbuilding | Idaho | New Mexico-class battleship | For United States Navy. |
| 30 June | Germany | AG Vulcan | Hamburg | Württemberg | Bayern-class battleship | For Imperial German Navy. |
| 5 July | United Kingdom | Vickers Limited | Barrow in Furness | Curlew | C-class cruiser | For .Royal Navy |
| 6 July | United Kingdom | Swan Hunter & Wigham Richardson | Wallsend | Coventry | C-class cruiser | For Royal Navy. |
| 7 July | United Kingdom | John I. Thornycroft & Company | Southampton | Shakespeare | Thornycroft type flotilla leader | For Royal Navy. |
| 2 August | United States | Northwest Steel | Portland, Oregon | War Viceroy | Cargo ship | For United States Shipping Board.[25][26] |
| 15 August | United States | William Cramp & Sons | Philadelphia, Pennsylvania | Siboney | Cargo ship | Requisitioned by United States Shipping Board.[21] |
| 16 August | United Kingdom | Harland & Wolff | Belfast | War Clover | Cargo ship | For British Shipping Controller.[27] |
| 18 August | United Kingdom | John Brown & Company | Clydebank | Vanquisher | V-class destroyer | For Royal Navy. |
| 21 August | United Kingdom | R. & W. Hawthorn, Leslie & Co. Ltd. | Newcastle upon Tyne | Verdun | V-class destroyer | For Royal Navy. |
| 23 August | United States | Pusey & Jones | Gloucester City, New Jersey | Chestnut Hil | Tanker | Requisitioned by United States Shipping Board.[21] |
| 25 August | United States | Moore Dry Dock Company | Oakland, California | Coronado | Cargo ship | For Requisitioned by United States Shipping Board.[21] |
| 30 August | United States | Bethlehem Alameda | Alameda, California | J. E. O'Neil | Tanker | Requisitioned by United States Shipping Board.[21] |
| 30 August | United Kingdom | Harland & Wolff | Belfast | Rimouski | Cargo ship | For Dominion Line.[28] |
| 1 September | United Kingdom | William Doxford & Sons | Sunderland | Vega | V-class destroyer | For Royal Navy. |
| 2 September | United States | J. F. Duthie & Company | Seattle, Washington | West Point | Cargo ship | For private owner.[21][29] |
| 4 September | United Kingdom | J. Samuel White | Cowes | Vectis | V-class destroyer | For Royal Navy. |
| 14 September | United States | Northwest Steel | Portland, Oregon | Landaas | Cargo ship | For private owner.[26][25] |
| 15 September | Sweden | Götaverken | Gothenburg | Drottning Victoria | Sverige-class coastal defence ship | For Royal Swedish Navy. |
| 15 September | Sweden | Kockums Mekaniska Verkstad | Malmö | Gustav V | Sverige-class coastal defence ship | For Royal Swedish Navy. |
| 15 September | United Kingdom | Harland & Wolff | Belfast | War Trefoil | Cargo ship | For British Shipping Controller.[30] |
| 29 September | United States | Chester Shipbuilding Company | Chester, Pennsylvania | Sudbury | Cargo ship | Requisitioned by United States Shipping Board. |
| 6 October | United States | Baltimore Dry Dock and Shipbuilding Company | Baltimore, Maryland | Elinor | Cargo ship | Requisitioned by United States Shipping Board.[21] |
| 13 October | United States | William Cramp & Sons | Philadelphia, Pennsylvania | Santa Ana | Transport ship | Requisitioned by United States Shipping Board.[21] |
| 15 October | Japan | Kure Naval Arsenal | Kure | Ro-11 | Kaichū I-type submarine | For Imperial Japanese Navy. |
| 16 October | United Kingdom | Harland & Wolff | Belfast | War Hostage | A0 Tanker | For British Shipping Controller.[31] |
| 17 October | United Kingdom | Harland & Wolff | Govan | Minnedosa | Passenger ship | For Canadian Pacific Railway. |
| 18 October | United Kingdom | Cammell Laird | Birkenhead | Scott | Admiralty type flotilla leader | For Royal Navy. |
| 20 October | United Kingdom | Robert Duncan & Co. | Port Glasgow | Mahratta | Cargo ship | For T. & J. Brocklebank Ltd. |
| 20 October | United States | Standard Shipbuilding Company | Shooters Island, New York | Muscatine | Refrigerated cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 26 October | United States | New York Shipbuilding | Camden, New Jersey | Sylvan Arrow | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 27 October | United States | Bethlehem Fore River | Quincy, Massachusetts | K. I. Luckenbach | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 27 October | United States | Bethlehem Alameda | Alameda, California | A. C. Bedford | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 27 October | United States | McDougall-Duluth Shipbuilding | Duluth, Minnesota | Lake Traverse | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 30 October | United States | Moore Dry Dock Company | Oakland, California | Yosemite | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 31 October | United Kingdom | Greenock & Grangemouth Dockyard Company | Grangemouth | Wellpark | Cargo ship | For Denholm Line Steamers Ltd. |
| 1 November | United States | Skinner & Eddy | Seattle, Washington | War Flame | Cargo ship | For United States Shipping Board.[32] |
| 3 November | United States | Albina Engine & Machine Works | Portland, Oregon | Margit | Cargo ship | Requisitioned by the United States Shipping Board.[21][25] |
| 4 November | United States | Northwest Steel | Portland, Oregon | Halgren | Cargo ship | Requisitioned by the United States Shipping Board.[21][25] |
| 6 November | United States | J. F. Duthie & Company | Seattle, Washington | Hallbjorg | Cargo ship | Requisitioned by the United States Shipping Board.[21][29] |
| 10 November | United States | Baltimore Dry Dock and Shipbuilding Company | Baltimore, Maryland | Luella | Refrigerated cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 10 November | United States | Pusey & Jones | Gloucester City, New Jersey | John M. Connelly | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 10 November | United States | Bethlehem Alameda | Alameda, California | Redondo | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 11 November | United States | Fore River Shipyard | Quincy, Massachusetts | Little | Wickes-class destroyer | For United States Navy. |
| 11 November | United States | Bethlehem Alameda | Alameda, California | Herbert. L. Pratt | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 15 November | United Kingdom | Harland & Wolff | Belfast | War Cobra | B-type cargo ship | For British Shipping Controller.[33] |
| 17 November | Germany | Howaldtswerke | Kiel | Magdeburg | Cöln-class cruiser | For Imperial German Navy. |
| 17 November | United States | Newport News Shipbuilding | Newport News, Virginia | Munaires | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 17 November | United States | Chester Shipbuilding Company | Chester, Pennsylvania | Overbrook | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 19 November | United States | Columbia River Shipbuilding | Portland, Oregon | War Sirdar | Cargo ship | Requisitioned by the United States Shipping Board.[25] |
| 21 November | United States | Seattle Construction and Drydock Company | Seattle, Washington | Sacramento | Cargo ship | Requisitioned by the United States Shipping Board.[21][34] |
| 24 November | United States | Skinner & Eddy | Seattle, Washington | Seattle | Cargo ship | For United States Shipping Board.[21][34] |
| 24 November | United States | Ames Shipbuilding and Dry Dock Company | Seattle, Washington | Westerly | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 24 November | United States | Newport News Shipbuilding | Newport News, Virginia | J. C. Donnell | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 24 November | United States | American Shipbuilding Company | Cleveland, Ohio | Lake Lillian | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 24 November | United States | American Shipbuilding Company | Detroit, Michigan | Lake Duane | Cargo Ship | Requisitioned by the United States Shipping Board.[21] |
| 25 November | United States | Ames Shipbuilding and Dry Dock Company | Seattle, Washington | War Brigade | Cargo ship | For United States Shipping Board.[34] |
| 29 November | United States | Albina Engine & Machine Works | Portland, Oregon | Erling | Cargo ship | Requisitioned by the United States Shipping Board.[21][25] |
| 1 December | Japan | Kure Naval Arsenal | Kure | Ro-12 | Kaichū I-type submarine | For Imperial Japanese Navy |
| 1 December | United States | Grays Harbor Motorship Corporation | Grays Harbor, Washington | Abrigada | Cargo ship | For United States Shipping Board.[21] |
| 5 December | United States | Northwest Steel | Portland, Oregon | War Ally | Cargo ship | Requisitioned by the United States Shipping Board.[21][25] |
| 8 December | United States | J. F. Duthie & Company | Seattle, Washington | Westfield | Cargo ship | Requisitioned by the United States Shipping Board.[21][34] |
| 8 December | United States | New York Shipbuilding | Camden, New Jersey | Fairmont | Collier | Requisitioned by the United States Shipping Board.[21] |
| 9 December | United States | Moore Dry Dock Company | Oakland, California | Yellowstone | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 12 December | United States | Puget Sound Bridge & Dredging Company | Seattle, Washington | Dixmude | Auxiliary schooner | For the French government.[34] |
| 12 December | United States | Great Lakes Engineering Works | Ecorse, Michigan | Lake Elizabeth | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 12 December | United States | Great Lakes Engineering Works | Ecorse, Michigan | Lake St. Clair | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 14 December | United States | Fore River Shipyard | Quincy, Massachusetts | Kimberly | Wickes-class destroyer | For United States Navy. |
| 15 December | United States | Los Angeles Shipbuilding and Dry Dock Company | San Pedro, California | Accomac | Cargo ship | For United States Shipping Board.[21] |
| 15 December | United States | Mare Island Navy Yard | Vallejo, California | Fairfax | Wickes-class destroyer | For United States Navy. |
| 15 December | United States | American Shipbuilding Company | Cleveland, Ohio | Lake Otisco | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 15 December | United States | American Shipbuilding Company | Superior, Wisconsin | Lake Tulare | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 15 December | United States | Kruse & Banks Shipbuilding Company | North Bend, Oregon | North Bend | Cargo ship | For United States Shipping Board.[21] |
| 15 December | United States | Pusey & Jones | Wilmington, Delaware | Piqua | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 15 December | United States | Skinner & Eddy | Seattle, Washington | Trontolite | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 15 December | United States | Seattle Construction and Drydock Company | Seattle, Washington | Walter A. Luckenbach | Cargo ship | Requisitioned by the United States Shipping Board.[21][34] |
| 16 December | United States | Fore River Shipyard | Quincy, Massachusetts | Sigourney | Wickes-class destroyer | For United States Navy. |
| 17 December | United States | William Cramp & Sons | Philadelphia, Pennsylvania | Rathburne | Wickes-class destroyer | For United States Navy. |
| 17 December | United States | Bethlehem Alameda | Alameda, California | S. M. Spaulding | Tanker | requisitioned by the United States Shipping Board.[21] |
| 18 December | United Kingdom | Harland & Wolff | Belfast | Vedic | Passenger ship | For White Star Line. |
| 19 December | United States | Bethlehem Wilmington | Wilmington, Delaware | Saetia | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 20 December | United States | American Shipbuilding Company | Lorain, Ohio | Lake Como | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 20 December | United States | Great Lakes Engineering Works | Detroit, Michigan | Lake St. Regis | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 22 December | United States | Skinner & Eddy | Seattle, Washington | Absaroka | Cargo ship | For United States Shipping Board.[21] |
| 22 December | United States | Seattle Construction and Drydock Company | Seattle, Washington | Gwin | Caldwell-class destroyer | For United States Navy.[35] |
| 22 December | United States | Standard Shipbuilding Company | Shooters Island, New York | Ice King | Refrigerated cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 22 December | United States | Columbia River Shipbuilding | Portland, Oregon | War Agate | Cargo ship | For United States Shipping Board.[25] |
| 22 December | United States | New York Shipbuilding | Camden, New Jersey | Broad Arrow | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 27 December | United States | New York Shipbuilding | Camden, New Jersey | Freeman | Collier | Requisitioned by the United States Shipping Board.[21] |
| 28 December | United Kingdom | William Beardmore and Company | Dalmuir | Vancouver | V-class destroyer | For Royal Navy. |
| 28 December | United States | Toledo Shipbuilding Company | Toledo, Ohio | Lake Sunapee | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 29 December | United States | American Shipbuilding Company | Detroit, Michigan | Lake Conway | Cargo ship | Requisitioned by the United States Shipping Board.[21] |
| 29 December | United Kingdom | Harland & Wolff | Belfast | War Expert | A0 tanker | For British Shipping Controller.[36] |
| 29 December | United Kingdom | Harland & Wolff | Belfast | War Python | B-type cargo ship | For British Shipping Controller.[37] |
| 30 December | United States | Bethlehem Alameda | Alameda, California | W. M. Irish | Tanker | Requisitioned by the United States Shipping Board.[21] |
| 2nd Quarter | United Kingdom | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Pontoon | For private owner.[38] |
| 2nd Quarter | United Kingdom | I. J. Abdela & Mitchell Ltd. | Queensferry | Unnamed | Pontoon | For private owner.[39] |
| 4th Quarter | United Kingdom | I. J. Abdela & Mitchell Ltd. | Queensferry | James Evans | Naval trawler | For Royal Navy.[40] |
| Unknown date | United Kingdom | S. P. Austin & Sons Ltd. | Sunderland | Buffs | Collier | For Wm. Cory & Sons Ltd. |
| Unknown date | United Kingdom | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Camswan | Cargo ship | For Osbourne Steamship Co. Ltd.[42] |
| Unknown date | Netherlands | Gebroeders van Diepen | Waterhuizen | De Lauwers | Schooner | For private owner. |
| Unknown date | United Kingdom | Blyth Shipbuilding & Dry Docks Co. Ltd | Blyth | Elwick | Cargo ship | For Sharp Steamship Co. Ltd.[43] |
| Unknown date | United States | Baltimore Shipbuilding Corporation | Baltimore, Maryland | Holden Evans | tanker | For unknown owner. |
| Unknown date | United States | Texas Steamship Company | Bath, Maine | Maine | Cargo ship | For United States Shipping Board. |
| Unknown date | United Kingdom | Beeching Brothers Ltd. | Great Yarmouth | Selina Salmon | Steam drifter | For John Salmon.[46] |
| Unknown date | Netherlands | L Smit & Zoon | Kinderdijk | Tilburg | Cargo ship | For NV Nederlandsche Scheepvaart Maatschappij Transatlanta. |
| Unknown date | United States | Skinner & Eddy | Seattle, Washington | West Haven | Cargo ship | For United States Shipping Board. |