U-32 may refer to one of the following German submarines:
, was a Type U 31 submarine launched in 1914 and that served in the First World War until sunk on 8 May 1918 During the First World War, Germany also had these submarines with similar names: , a Type UB II submarine launched in 1915 and sunk on 22 September 1917 , a Type UC II submarine launched in 1916 and sunk on 23 February 1917 , a Type VIIA submarine that served in the Second World War until sunk on 30 October 1940 , a Type 212 submarine of the Bundesmarine that was launched in 2003 and in service