KMS SM U-137

German submarine U-137 was a Type IID U-boat of Nazi Germany's Kriegsmarine in World War II. Her keel was laid down on 16 November 1939 by Deutsche Werke in Kiel. She was launched on 18 May 1940 and commissioned on 15 June 1940 with Oberleutnant zur See Herbert Wohlfarth in command.

U-137 conducted four patrols, sinking six ships totalling 24,136 gross register tons (GRT) and damaged one vessel of 4,917 GRT. She also damaged one auxiliary warship of 10,552 GRT. She was scuttled shortly before Germany's surrender on 2 May 1945 at Wilhelmshaven. U-137 never suffered any casualties to her crew.