门德尔松湾是南极洲的海湾，位于亚历山大一世岛西南部，处于德罗契尔半岛和埃罗伊卡半岛之间的贝多芬半岛北部，长46公里、宽17公里，现时由南极条约体系管理。

Mendelssohn Inlet. 美国地质局地理名称信息系统. [2013-09-18]. 

Mendelssohn Inlet (71°17′S 72°52′W / 71.283°S 72.867°W / -71.283; -72.867) is an ice-filled inlet, 25 nautical miles (46 km) long and 9 nautical miles (17 km) wide, situated between Derocher Peninsula and Eroica Peninsula on the north side of Beethoven Peninsula, in the southwest part of Alexander Island, Antarctica. The inlet was first sighted from the air and roughly mapped by the United States Antarctic Service, 1939–41, and was resighted and photographed from the air by the Ronne Antarctic Research Expedition (RARE), 1947–48. It was remapped from the RARE photos by D. Searle of the Falkland Islands Dependencies Survey in 1960, and named by the UK Antarctic Place-Names Committee after German composer Felix Mendelssohn.