The Mountain Pygmy Possum is endemic to south-eastern Australia where it occurs as three isolated, genetically distinct populations: 1) between Mt. Bogong and Mt. Higginbotham, Victoria 2) at Mt. Buller, Victoria and 3) in the Kosciuszko region of New South Wales (Osborne et al. 2000). Its range is much smaller than the mapped distribution, and its area of occupancy is estimated to be less than 6 or 7 km² (Heinze et al. 2004; Broome 2008). This species ranges in elevation from 1,300 to 2,228 m asl (Broome 2008).