Perth is a major city.
Perth is the capital and largest city of the Australian state of Western Australia . It is the fourth-most populous city in Australia , with an estimated population of 2.06 million living in Greater Perth . As part of Perth 's role as the capital of Western Australia , the state 's Parliament and Supreme Court are located within the city , as is Government House , the residence of the Governor of Western Australia . Perth came seventh in the Economist Intelligence Unit 's August 2016 list of the world 's most liveable cities , and was classified by the Globalization and World Cities Research Network in 2010 as a world city .