The Northern Quoll occurs in the northern parts of Australia. Historically, it occurred in northern Australia from Pilbara to south-east Queensland, extending inland as far south as Alexandria. More recently, there has been substantial decline in southern and eastern Queensland and the Cape York Peninsula. The Northern Quoll has apparently disappeared from most or all of the lower rainfall former range in the Northern Territory and south-east and south-west Kimberley. A substantial decline has also occurred in Pilbara (Maxwell et al. 1996). The species has been recorded from Groote Eylandt and the nearby North-east Island, Marchinbar Island (in the Wessel group), Inglis Island (in the English Company Islands group) and Vanderlin Island (Sir Edward Pellew group). It has also been recently translocated to Astell and Pobassoo Islands in the English Company island group (Woinarski 2005). This species occurs up to around 1,300 m asl.