German submarine U-656 was a German World War II Type VIIC U-boat built for the German Kriegsmarine for service during World War II. She was ordered on 9 October 1939 and the keel laid on 4 September 1940. Construction on U-656 was carried out by Hamburg company Howaldtswerke in Yard 805. She was launched on 8 July 1941 and commissioned on 17 September 1941. U-656 went into service initially with 5th U-boat Flotilla for training from September 1941 until December 1941. She moved into operational service with 1st U-boat Flotilla on 1 January 1942, and was commanded by Ernst Kröning.