German submarine U-805

German submarine U-805 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II.

U-805 was ordered in April 1941 from DeSchiMAG Seebeckwerft in Geestemünde under the yard number 714. Her keel was laid down on 24 December 1942, and the U-boat was launched the following year sometime in October 1943. In February 1944 she was commissioned into service under the command of Kapitänleutnant Richard Bernardelli (Crew 32) in the 4th U-boat Flotilla. She spent the next year as a training boat with the flotilla, then was transferred to the 33rd U-boat Flotilla and deployed on her one and only war patrol in March 1945. At the end of the war U-805 was operating in the West Atlantic as part of the Seewolf group, when she received orders to make for an Allied port in order to surrender. The U-boat reached Portsmouth, New Hampshire, on 14 May 1945, where the crew surrendered and handed the boat over to the US Navy.

The US Navy took U-805 on several Victory Visits to ports on the east coast of the United States before sinking her off the coast in position 42.53333°N, -69.61667°W on 4 February 1946.