U-85 may refer to one of the following German submarines:
- SM U-85, a Type U 81 submarine launched in 1916 and that served in the First World War until sunk on 12 March 1917
- During the First World War, Germany also had this submarine with a similar name:
- SM UB-85, a Type UB III submarine launched in 1917 and sunk on 30 April 1918. In a similar way to the SM U-28 sinking the British steamship Iberian, there were reports allegedly of a sea monster appearing as the U-boat sunk.
- During the First World War, Germany also had this submarine with a similar name:
- German submarine U-85 (1941), a Type VIIB submarine that served in the Second World War until sunk on 14 April 1942
  | This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists. |