German submarine U-19 was a Type IIB U-boat of the German Kriegsmarine during World War II. Her keel was laid down on 20 July 1935, at the Germaniawerft of Kiel. She was launched on 21 December 1935, and commissioned on 16 January 1936, under the command of Kapitänleutnant Viktor Schütze. U-19 conducted 20 patrols, sinking 15 ships totalling 35,871 tons. On 1 May 1940, U-19 was withdrawn from combat duty and used for training and as a school boat. She returned to active duty in the 30th U-boat Flotilla on 1 May 1942, after having been transported overland and along the Danube to the Black Sea.