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 southeast of perth's central business district. the city covers an area of , much of which is state forest rising into the darling scarp to the east, and had a population of approximately 118,000 at the 2016 census. the largest activity centre in the city is the central maddington shopping centre. district centres exist in the gosnells town centre, thornlie and canning vale.