German submarine U-275 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

She was launched on 8 October 1942 and commissioned on 25 November under the command of Oberleutnant zur See Helmut Bork.

The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

U-275 carried out a series of short voyages between Kiel in Germany and Bergen and Trondheim in Norway in August 1943.

The boat's second foray was divided into a series of short bursts between La Pallice and Brest between November 1943 and April 1944.

Another moment of drama came when the submarine was obliged to return to base on 3 January with the captain suffering from appendicitis.

Not long after D-Day (6 June 1944) on her fourth sortie, having been identified by Cryptanalysis of the Enigma intercepts, which was confirmed with a solo photographic reconnaissance Spitfire from No.

[4] While negotiating the relatively shallow waters of the English Channel, the submarine was discovered by an aircraft which vectored a hunter-killer group onto her.

A coastal battery also fired on the British aircraft, causing them to leave the scene of the attack.

These two patrols were relatively trouble-free, but the boat did return to the French Atlantic coast, docking at St. Nazaire on 10 February 1945.