| 释义 |
U-81 may refer to one of the following German submarines: - {{SMU|U-81}}, a Type U 81 submarine launched in 1916 and that served in the First World War until sunk on 1 May 1917
- During the First World War, Germany also had this submarine with a similar name:
- {{SMU|UB-81}}, a Type UB III submarine launched in 1917 and sunk on 2 December 1917
- {{GS|U-81|1941}}, a Type VIIC submarine that served in the Second World War until sunk on 9 January 1944; raised on 22 April 1944 and broken up
{{Shipindex}}{{italic title prefixed|16}}{{DEFAULTSORT:U-081}} 1 : Submarines of Germany |