|6th U-boat Flotilla|
|Active||October 1938–December 1939|
July 1941–August 1944
|Garrison/HQ||Kiel, Danzig, St. Nazaire|
|Korvettenkapitän Werner Hartmann|
Korvettenkapitän Georg-Wilhelm Schulz
Kapitänleutnant Carl Emmermann
Formed on 1 October 1938 in Kiel under the command of Korvettenkapitän Werner Hartmann, it was named in honour of Kapitänleutnant Paul Hundius, a U-boat commander during World War I, that died on 16 September 1918 after his U-boat SM UB-103 was sunk by depth charges from British steamer Young Crow. The flotilla was disbanded in December 1939.
The flotilla was re-formed as "6th U-boat Flotilla" in July 1941 under the command of Korvettenkapitän Georg-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.
|Korvettenkapitän Werner Hartmann||October 1938–December 1939|
|Korvettenkapitän Georg-Wilhelm Schulz||September 1941–November 1943|
|Kapitänleutnant Carl Emmermann||November 1942–August 1944|
At one point in their service history, each of the following boats served with 6th flotilla