German submarine U-204 was a Type VIIC U-boat of the Kriegsmarine during World War II. The submarine was laid down on 22 April 1940 by the Friedrich Krupp Germaniawerft yard at Kiel as 'werk' 633, launched on 23 January 1941 and commissioned on 8 March under the command of Oberleutnant Walter Kell. She was sunk in October 1941 by British warships.