Günther Heydemann (11 January 1914 – 2 January 1986) was a German U-boat commander in the Kriegsmarine of Nazi Germany in World War II. He was a recipient of the Knight's Cross of the Iron Cross. Prior to taking command of U-575, Heydemann made two war patrols as watch officer on board U-69 under the command of Kapitänleutnant Jost Metzler.