U-113 may refer to one of the following German submarines:
- SM U-113, a Type U 93 submarine launched in 1917 that served in the First World War and was surrendered in 1918
- During the First World War, Germany also had this submarine with a similar name:
- SM UB-113, a Type UB III submarine launched in 1917 and disappeared in 1918
- During the First World War, Germany also had this submarine with a similar name:
- German submarine U-113 (1939), would have been a Type XIB submarine, a large cruiser-type submarine capable of carrying an Arado Ar 231 aircraft; laid down in 1939, but cancelled after the outbreak of the Second World War
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.