German submarine U-1277 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine during World War II.

She was ordered on 13 June 1942, and was laid down on 6 August 1943 at Bremer Vulkan AG, Bremen, as yard number 72.

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.

What is known is that she continued her patrol in the North Atlantic for a further month, her crew finally scuttling her on 3 June 1945 off the northern coast of Portugal.

All 47 crew disembarked safely from their sinking boat in rubber dinghies and made their way ashore, landing on the beach at Angeiras, Portugal.