S-80 was a diesel-electric submarine of the Soviet Navy. Its keel was laid down on 13 March 1950 at Krasnoye Sormovo as a Project 613 unit (NATO : ). It was launched on 21 October, and delivered to Baku on the Caspian Sea on 1 November for tests, then transferred north via inland waterways in December. It was commissioned into the Northern Fleet on 2 December 1952, and operated there until mid-1957.