The City of Armadale is a local government area in the southeastern suburbs of the Western Australian capital city of Perth, about 28 kilometres (17.4 mi) southeast of Perth's central business district. The City covers an area of 560 square kilometres (216 sq mi), much of which is state forest rising into the Darling Scarp to the east, and had a population of almost 80,000 as at the 2016 Census. At the 2021 census, the population had risen to 94,184.

Perth is the capital city of Western Australia. It is the fourth most populous city in Australia, with a population of over 2.3 million within Greater Perth. It is part of the South West Land Division of Western Australia, with the majority of Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River, upon which its central business district and port of Fremantle are situated.