List of ship decommissionings in 1991
The list of ship decommissionings in 1991 includes a chronological list of all ships decommissioned in 1991.
| Operator | Ship | Flag | Class and type | Fate | Other notes | |
| 15 January | Fred. Olsen Lines | ' | Cruiseferry | Sold to Color Line | Renamed Christian IV | |
| January | Sealink Stena Line | ' |  Bahamas|civilnavy|United KingdomHMS|Phoebe|F42|2sclass|Leander|frigate|2ship|M/S|Tor Scandinavia||2DNKship|M/S|Rogalin||2POLnavy|United KingdomHMS|Penelope|F127|2sclass|Leander|frigate|2ship|BAE|Presidente Eloy Alfaro|FM 01|2navy|United StatesUSS|Coral Sea|CV-43|2sclass|Midway|aircraft carrier|2ship|M/S|Peder Paars||2DNKship|M/S|Silvia Regina||2SWEship|M/S|Eurosun||2BMUship|M/S|Pegasus||2GRCnavy|United KingdomHMS|Charybdis|F75|2sclass|Leander|frigate|2navy|United StatesUSS|Lexington|CV-16|2sclass|Essex|aircraft carrier|2navy|Uruguayship|ROU|18 De Julio|DE-3|2 |