German submarine U-555

German submarine U-555 was a Type VIIC U-boat of the Nazi German Kriegsmarine during World War II. The submarine was laid down on 2 January 1940 at the Blohm & Voss yard in Hamburg as 'werk' 531, launched on 7 December 1940, and commissioned on 30 January 1941 under the command of Kapitänleutnant Hans-Joachim Horrer.

Service history
Initially attached to the 24th U-boat Flotilla, she was transferred to the 21st U-boat Flotilla based at Pillau (now Baltiysk in Russia) on 1 December 1942, and served throughout the war under a number of commanders as a training boat, seeing no combat service.

The U-boat was stricken on 1 March 1945, and surrendered to the British in May. She was later broken up.