The list of ship decommissionings in 1990 includes a chronological list of all ships decommissioned in 1990.
| Date | Operator | Ship | Flag | Class and type | Fate | Other notes | |
|---|---|---|---|---|---|---|---|
| January | Royal Admiral Cruises | Stardancer | Cruiseferry | Sold to Royal Caribbean Cruise Lines | Renamed Viking Serenade | ||
| 6 February | CTC Cruises | Returned to Far Eastern Shipping Company, laid up | Sold to Orient Lines, 1991; renamed Marco Polo, entered service 1993 | ||||
| 6 March | Jakob Lines | Botnia Express | Ferry | Returned to Vaasanlaivat-Vasabåtarna | Re-chartered to Baltic Express Line, but never entered service; laid up in Vaasa; sold to Eckerö Linjen in 1992 | ||
| April | Rederi AB Slite | Viking Sally | Cruiseferry | End of charter | Transferred to Silja Line; renamed Silja Star | ||
| 5 May | Silja Line | Finlandia | Cruiseferry | Sold to Scandinavian Seaways | Renamed Queen of Scandinavia | ||
| 21 May | Olau Line | Olau Britannia | Cruiseferry | Sold to Fred Olsen Lines | Renamed Bayard | ||
| May | Europe Cruise Line | Eurosun | Cruise ship | Chartered to Sea Containers | Renamed Orient Express | ||
| 1 June | Scandinavian Seaways | Dana Regina | Ferry | Renamed Nord Estonia for EstLine traffic | |||
| 18 October | Stena Line (Canada) | Ferry | Laid up | Sold to Starlite Cruises in December, renamed Pacific Star | |||
| 14 September | Jahre Line | Cruiseferry | Transferred to Color Line | Continued on same route | |||
| October | Jahre Line | Cruiseferry | Transferred to Color Line | Continued on same route | |||
| November | Silja Line | Silja Star | Cruiseferry | Transferred to Wasa Line | Renamed Wasa King | ||
| November | Sea Containers | Orient Express | Cruise ship | End of charter, returned to Europe Cruise Line | Renamed Eurosun | ||
| 1 December | Decommissioned | Sold to Chile, renamed [1] | |||||
| 29 December | Fred. Olsen Lines | Cruiseferry | Laid up | Chartered to Baltic Line, 1991; renamed Anna Karenina | |||
| Date uncertain | Decommissioned | Sold to Ecuador, renamed | |||||
| Date uncertain | Sigma Ferries | Ferry | Renamed Ydra |