The City of Gosnells is a local government area in the southeastern suburbs of the Western Australian capital city of Perth, located northwest of Armadale and about 20 kilometres (12 mi) southeast of Perth’s central business district. The City covers an area of 128 square kilometres (49.42 sq mi), much of which is state forest rising into the Darling Scarp to the east, and has a population of 106,585 at the 2011 Census.