German submarine U-176 was a Type IXC U-boat in the Nazi German Kriegsmarine during World War II. Built at the AG Weser shipyard in Bremen, she was laid down on 6 February 1941, launched on 12 September and commissioned on 15 December, under the command of Kapitänleutnant Reiner Dierksen. U-176 served with the 4. Unterseebootsflotille (U-boat flotilla) while training, and from 1 August 1942 with the 10th U-boat Flotilla, a long-range operations unit. U-176 completed three patrols, sinking 11 ships totalling before she was sunk off Cayo Blanquizal by the Cuban navy on 15 May 1943.