Mount Nils Larsen () is a mountain, 2,190 m, standing 3 nautical miles (6 km) southwest of Mount Wideroe in the Sor Rondane Mountains. Mapped by Norwegian cartographers in 1957 from air photos taken by U.S. Navy Operation Highjump, 1946–47, and named for Captain Nils Larsen, leader of the Norwegian expedition 1928-29.
This article incorporates public domain material from the United States Geological Survey document "Mount Nils Larsen" (content from the Geographic Names Information System).