German submarine U-147

U-147 may refer to one of the following German submarines:


 * SMU U-147, a Type U 142 submarine laid down during the First World War but unfinished at the end of the war; broken up incomplete 1919–20
 * During the First World War, Germany also had this submarine with a similar name:
 * SMU UB-147, a Type UB III submarine launched in 1918 and but unfinished at the end of the war; broken up incomplete in 1919
 * GS U-147 (1940), a Type IID submarine that served in the Second World War until sunk on 2 June 1941