Masson Island is located in the western part of Mawson Sea at 66°08′S 96°35′E / 66.133°S 96.583°E / -66.133; 96.583 and has an elevation of 465 metres (1,526 ft).

Masson Island was discovered in February 1912 by the Australian Antarctic Expedition under Sir Douglas Mawson, who named it for Professor Sir David Orme Masson of Melbourne, a member of the Australian Antarctic Expedition Advisory Committee.

This article incorporates public domain material from "Masson Island".

Geographic Names Information System.

United States Geological Survey.