Gunter Jahn (27 September 1910 – 12 April 1992) was a German U-boat commander during World War II.

He was born in Hamburg, Germany and began his naval career in April 1931 as a Seekadett.

In March 1941 Jahn joined the U-boat force and his first patrol was on board U-98 in September 1941.

On his second patrol he broke through the Strait of Gibraltar and went on to become one of the most successful U-boat commanders in the Mediterranean Sea.

In July 1943 he left the boat and became the commander of the 29th U-boat Flotilla.