The list of ship commissionings in 1975 includes a chronological list of all ships commissioned in 1975.
| Operator | Ship | Flag | Class and type | Pennant | Other notes | |
|---|---|---|---|---|---|---|
| 25 January |  United States Navy | South Carolina | California-class cruiser | CGN-37 | ||
| 3 May | United States Navy | Nimitz | Nimitz-class aircraft carrier | CVN-68 | First in class | |
| 15 May | Rederi AB Svea | Svea Corona |  Sweden | Ferry | For Silja Line traffic | |
| 9 July | Finland Steamship Company | Wellamo |  Finland | Ferry | For Silja Line traffic | |
| 20 September | United States Navy | Spruance | Spruance-class destroyer | DD-963 | ||
| 30 September |  Soviet Navy | Druzhny | Project 1135 large anti-submarine ship | 200 | ||
| 3 October |  Royal Netherlands Navy | Tromp | Tromp-class frigate | F801 | First in class | |
| 25 November | Soviet Navy | Marshal Timoshenko | Project 1134A Berkut A large anti-submarine ship | 251 | ||
| 11 December | Finnlines | Bore Star | Finland | Ferry (used as a cruise ship) | Chartered from Steamship Company Bore; marketed under the name Finnpartner | |
| 28 December | Soviet Navy | Kiev | Kiev-class aircraft carrier | First in class |