The 6th U-boat Flotilla (German6. Unterseebootsflottille), also known as Hundius Flotilla, was a front-line unit of Nazi Germany's Kriegsmarine before and during World War II.
The flotilla was re-formed as "6th U-boat Flotilla" in July 1941 under the command of KorvettenkapitänGeorg-Wilhelm Schulz with her base in Danzig. During the first months it was a training flotilla, but when it moved to St. Nazaire in February 1942 it became a combat flotilla. It was disbanded in August 1944, when the last boats left the base for Norway.