The City of Perth is a local government area and body, within the Perth metropolitan area, which is the capital of Western Australia. The local government is commonly known as Perth City Council. The City covers the Perth city centre and surrounding suburbs. The City covers an area of 20.01 square kilometres and had an estimated population of 21,092 as at 30 June 2015. On 1 July 2016 the City expanded, absorbing 1,247 residents from the City of Subiaco.