German submarine U-80 was a Type VIIC submarine of the Nazi German Kriegsmarine during World War II. She was laid down at the Bremer Vulkan Vegesacker Werft in Bremen as 'werk' 8 on 17 April 1940, launched on 11 February 1941 and commissioned on 8 April under Oberleutnant Georg Staats. U-80 spent her career as a training boat, first with the 1st U-boat Flotilla, then the 26th, 24th, 23rd and 21st flotillas. She sank or damaged no ships, but was herself sunk in a diving accident west of Pillau (now Baltiysk in modern Russia), on 28 November 1944.