German submarine U-676

German submarine U-676 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 13 June 1942 at the Howaldtswerke yard at Hamburg, launched on 6 July 1943, and commissioned on 4 August 1943 under the command of Oberleutnant zur See Werner Sass.

Attached to 5th U-boat Flotilla based at Kiel, U-676 completed her training period on 31 August 1944 and was assigned to front-line service.

Service history
On the second and final patrol, U-676 was last heard of on 12 February 1945 while operating in the Gulf of Finland. In 2012 the wreck of U-676 was detected in position 59.5°N, 23°W. In the vicinity a mine barrage, Vantaa 3, had been laid by the FINNISH MINELAYER Louhi and FINNISH MINELAYER Ruotsinsalmi on 12 January 1945. All 57 crew members perished in the event.