朗格内斯湾是南极洲的海湾，处于朗格内斯半岛和布雷德内斯半岛之间，长19公里，该海湾由挪威制图师根据该国探险队拍摄的空中照片被绘入地图。

Langnes Fjord (68°30′S 78°15′E / 68.500°S 78.250°E / -68.500; 78.250) is a narrow fjord, 10 nautical miles (19 km) long, between Langnes Peninsula and Breidnes Peninsula in the Vestfold Hills of Antarctica. It was mapped from air photos by the Lars Christensen Expedition (1936–37) and named after Langnes Peninsula. John Roscoe's 1952 study of air photos taken by U.S. Navy Operation Highjump (1946–47) revealed that this fjord continues farther east than was previously mapped, and that it includes what had been plotted as an isolated lake which the Norwegians had called "Breidvatnet."