German submarine U-556
 German submarine U-556 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. She was laid down on 2 January 1940 at the Blohm & Voss yard in Hamburg as 'werk' 532 launched on 7 December 1940 and commissioned on 6 February 1941 under the command of Kapitänleutnant Herbert Wohlfarth who commanded her for her entire career. U-556 conducted only two patrols sinking six ships totalling 29552 tons and damaging one other of 4986 tons before she was sunk on 27 June 1941.