German submarine U-151 was a Type IID U-boat of Nazi Germany's Kriegsmarine during World War II. Her keel was laid down on 6 July 1940 by Deutsche Werke in Kiel as yard number 280. She was launched on 14 December 1940 and commissioned on 15 January 1941 with Kapitänleutnant Hans Oestermann in command.
U-151 began her service life with the 1st U-boat Flotilla. She was then assigned to the 22nd flotilla and subsequently to the 31st flotilla. She spent the war as a training vessel.
She was scuttled on 5 May 1945.
German Type IID submarines were enlarged versions of the original Type IIs. U-151 had a displacement of when at the surface and while submerged. Officially, the standard tonnage was , however. The U-boat had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to .
The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, the boat could operate for at ; when surfaced, she could travel at . U-151 was fitted with three torpedo tubes at the bow, five torpedoes or up to twelve Type A torpedo mines, and a anti-aircraft gun. The boat had a complement of 25.
The boat surrendered at the German island of Heligoland and was scuttled in the Raederschleuse (lock) at Wilhelmshaven on 5 May 1945. The wreck was broken up on an unknown date.