German submarine U-90
{{italic title prefixed|16}}
U-90 may refer to one of the following German submarines:
- {{SMU|U-90}}, a Type U 87 submarine launched in 1917 and that served in the First World War until surrendered on 20 November 1918; foundered in tow to Belgium November 1919
- During the First World War, Germany also had these submarines with similar names:
- {{SMU|UB-90}}, a Type UB III submarine launched in 1918 and sunk on 16 October 1918
- {{SMU|UC-90}}, a Type UC III submarine launched in 1918 and surrendered on 1 December 1918; served as Japanese submarine O-4, 1920–21; broken up at the Kure Naval Arsenal in 1921; used as target at submarine school at Kure, 1924–26; sold for scrap
- {{GS|U-90|1941}}, a Type VIIC submarine that served in the Second World War until sunk on 24 July 1942
{{Ship index}}
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