This ABC (A National government owned Media group) report states:
"For the first time, fewer than half of Australians identified as Christian, though Christianity remained the nation's most common religion (declared by 43.9 per cent of the population).
Meanwhile, the number of Australians who said they had no religion rose to 38.9 per cent (from 30.1 per cent in 2016)."
Read more? - https://www.abc.net.au/news/2022-06-28/census-2021-data-shows-a-changed-australia/101177152