German submarine U-158 was a Type IXC U-boat of Nazi Germany's Kriegsmarine built for service during World War II.

The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 metric horsepower (740 kW; 990 shp) for use while submerged.

Her route took her north of the British Isles, through the gap between Iceland and the Faroe Islands and into the Atlantic Ocean.

Her first victim was Empire Celt, sunk about 420 nmi (780 km; 480 mi) south southeast of St Johns on 24 February.

Instead, the surrounding water was turned into a blazing inferno after a seaman threw a life ring overboard and its built-in carbide lamp malfunctioned.

[6] Following the sinking of Knoxville City on 2 June, the survivors in their lifeboats declined an offer of help from Jamaica as they thought the German submarine was still nearby.

U-158 was sunk on 30 June 1942, west of the Bermudas, in position 32°50′N 67°28′W / 32.833°N 67.467°W / 32.833; -67.467, by depth charges from a PBM Mariner aircraft commanded by Richard Schreder of United States Navy Squadron VP-74.