U-14 may refer to one of the following German submarines:
, 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: , a Type UB I submarine launched in 1915 and surrendered in November 1918 , 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 , a Type IIB submarine that served in the Second World War and was scuttled on 2 May 1945 , a Type 206 submarine of the Bundesmarine that was launched in 1973 and scrapped in 1997