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Scientology has existed in Australia since the early 1950s. The number of Scientology adherents varies depending upon the source; according to the Australian Census, it has a declining population: 1,655 members in 2021, down from 1,681 in 2016 and 2,163 in 2011,[1][2] while Scientology itself has claimed 150,000 members in Australia.[3][4] It has headquarters in Sydney, Melbourne, Perth, Adelaide, and Canberra, along with a mission in Tasmania and Brisbane. Church of Scientology Sydney is the regional headquarters for the entire Asian and Pacific area.[5]