U-14 may refer to one of the following German submarines:
- SM U-14 (Germany), was a Type U 13 submarine launched in 1911 and that served in the First World War until sunk on 5 June 1915
- During the First World War, Germany also had these submarines with similar names:
- SM UB-14, a Type UB I submarine launched in 1915 and surrendered in November 1918
- SM UC-14, a Type UC I submarine launched in 1915 and sunk on 3 October 1917; while in Austro-Hungarian service in 1915, she was renamed U-18
- During the First World War, Germany also had these submarines with similar names:
- German submarine U-14 (1935), a Type IIB submarine that served in the Second World War and was scuttled on 2 May 1945
- German submarine U-14 (S193), a Type 206 submarine of the Bundesmarine that was launched in 1973 and scrapped in 1997
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.