Anseris Mons is an isolated massif (mountain) in the southern highlands of Mars, located at the northeastern edge of Hellas Planitia at longitude 86.65°E and latitude 29.81°S. The mountain is 58 kilometers in diameter and rises to an elevation of approximately 4,200 m (13,780 ft) above datum (martian "sea" level) or about 6,200 m (20,300 ft) above the surrounding plains.