The list of ship commissionings in 1973 includes a chronological list of all ships commissioned in 1973.
| Operator | Ship | Class and type | Pennant | Other notes | |
|---|---|---|---|---|---|
| 13 February |  United States Navy | Jesse L. Brown | Frigate | Knox-class frigate | |
| 13 March |  Finland, Finnlines | Finnpartner | Ferry | Formerly Stena Atlantica with Stena Line | |
| 31 March | United States Navy | Ainsworth | Frigate | Knox-class frigate | |
| 17 June | Finland, Rederi Ab Sally | Viking 4 | Ferry | For Viking Line traffic | |
| 30 June | Finland, SF Line | Aurella | Ferry | For Viking Line traffic | |
| 15 September |  Soviet Union | Marshal Voroshilov | Project 1134A Berkut A large anti-submarine ship | ||
| 17 November | United States Navy | Capodanno | Frigate | Knox-class frigate | |
| 28 December | Soviet Union | Admiral Oktyabrsky | Project 1134A Berkut A large anti-submarine ship |