The V-80 () was a 76-ton experimental submarine and the only representative of the German Type V design produced for Nazi Germany's Kriegsmarine.
The prototype was completed in 1940 in Friedrich Krupp Germaniawerft in Kiel. The four-man vessel was designed to test the Walter hydrogen peroxide-based turbine propulsion system. Its range was at .
The only earlier attempt to use a chemical reaction based air-independent propulsion system was in the Spanish submarine the Ictineo II.
This midget submarine led to the design of the German Type XVII submarine.