Western Australia is the largest state of Australia, with an area of , and its fourth most populous, with a population of 2,660,026 as of the 2021 Australian census. Official population statistics are created by the Australian Bureau of Statistics, who have a census every five years. The most recent census for which data has been released is the 2021 census.
Urban centres are defined by the Australian Bureau of Statistics to be clusters with a population of 1,000 or higher of urban SA1's. SA1's are areas that subdivide all of Australia, and have a population between 200 and 800 people and an average population size of 400.
Western Australia is divided into local government areas, who maintain roads, provide waste collection services, parks, libraries among other things. They are classified as either Cities, Towns of Shires, depending on population.
Western Australia is made up of nine regions, as well as the Perth Metropolitan Region.