List of ship decommissionings in 1943
The list of ship decommissionings in 1943 is a chronological list of all ships decommissioned in 1943. In cases where no official decommissioning ceremony was held, the date of withdrawal from service may be used instead. For ships lost at sea, see list of shipwrecks in 1943 instead.
| Operator | Ship | Class and type | Fate | Other notes | |
| 19 July | ' | escort carrier | Lend-Lease transfer to United Kingdom | Renamed | |
| 31 July | ' | escort carrier | Lend-Lease transfer to United Kingdom | Renamed | |
| 6 August | ' | escort carrier | Lend-Lease transfer to United Kingdom | Renamed | |
| 12 August | ' | escort carrier | Lend-Lease transfer to United Kingdom | Renamed | |
| September | Newmarket | destroyer | Reduced to care and maintenance status | ||
| 6 November | escort carrier | reduced to care and maintenance | Transferred to Ministry of War Transport in 1945 and renamed Empire Lagan |