German submarine U-311 was a Type VIIC U-boat of the Nazi German Kriegsmarine during World War II. The submarine was laid down on 21 March 1942 at the Flender Werke yard at Lübeck as 'werk' 311, launched on 20 January 1943 and commissioned on 23 March under the command of Kapitänleutnant Joachim Zander. During her short career, the U-boat sailed on two combat patrols, sinking a single ship, before she was sunk on 24 April 1944.