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