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 | Cruiseferry | Rebuilt | Renamed Stena Normandy (under charter from Rederi AB Gotland) | ||
| 14 February | Sold as scrap | ||||||
| 22 February | Scandinavian Seaways | Cruiseferry | Renamed Princess of Scandinavia | ||||
| 1 March | Polferries | Ferry | Chartered to Swansea-Cork Ferries | Renamed Celtic Pride | |||
| 31 March | Sold to Ecuador in 1991 | Renamed [1] | |||||
| 30 April | Scrapped | ||||||
| 19 May | DSB Färjedivision | Ferry | Sold to Stena Line | Renamed Stena Invicta for Sealink Stena Line traffic | |||
| 30 May | Silja Line | Cruiseferry | Sold to Stena Line | Renamed Stena Britannica | |||
| May | Europe Cruise Line | Cruise ship | Transferred to Orient Line Pte Ltd | Renamed Orient Sun | |||
| 2 June | Epirotiki Line | Cruise ship | Burnt at Venice; wreck laid up in Greece. | Sold to Strintzis Line in 1994 for rebuilding into a ferry; renamed Ionian Express; burnt in shipyard; scrapped 1995 | |||
| 30 September | Sunk as a target | ||||||
| 26 November | Preserved | Corpus Christi, Texas | |||||
| Date uncertain | Scrapped |