Larsen Inlet is an ice-filled inlet, 12 nautical miles (22 km) long in a north-south direction and 7 nautical miles (13 km) wide, between Capes Longing and Sobral along the east coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

. C.A. Larsen, Norwegian whaling captain, reported a large bay

Bay

A bay is an area of water mostly surrounded by land. Bays generally have calmer waters than the surrounding sea, due to the surrounding land blocking some waves and often reducing winds. Bays also exist as an inlet in a lake or pond. A large bay may be called a gulf, a sea, a sound, or a bight...

 in this area in 1893. Larsen's name was suggested for the feature by Edwin Swift Balch in 1902. The inlet was re-identified and charted by the Falkland Islands Dependencies Survey (FIDS) in 1947.