German submarine U-106

U-106 may refer to one of the following German submarines:


 * SMU U-106, a Type U 93 submarine launched in 1917 and that served in the First World War until sunk on 7 October 1917 60 km north of Terschelling in Netherlands.
 * During the First World War, Germany also had this submarine with a similar name:
 * SMU UB-106, a Type UB III submarine launched in 1917 and surrendered on 26 November 1918; dumped on beach at Falmouth after explosive trials 1921 and broken up in situ
 * GS U-106 (1940), a Type IXB submarine that served in the Second World War until sunk on 2 August 1943