German submarine U-1222

German submarine U-1222 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II.

U-1222 was ordered in August 1941 from Deutsche Werft in Hamburg-Finkenwerder under the yard number 385. Her keel was laid down on 2 November 1942 and was launched the following year on 6 June 1943. About three months later she was commissioned into service under the command of Kapitänleutnant Heinz Bielfeld (Crew 34) in the 4th U-boat Flotilla.

After work-up for deployment, U-1222 tranfered to the 10th U-boat Flotilla and left Kiel for the West Atlantic on 13 April 1944 for her first and only patrol. Stopping briefly in Marvik, Norway, for replenishment, she operated with no success south of Nova Scotia.

Returning from patrol, U-1222 was charging her batteries while submerged, when her snorkel was spotted by a British aircraft, Sunderland 'P' of No. 201 Squadron RAF, on 11 July 1944 off La Rochelle. The aircraft immediately attacked the U-boat with depth charges and sunk her. All 56 crew members died in the event.