Per the 2021 Australian Census, 44% of Australians (≈11.1 million) identified as Christian, down from 52% (2016) and 61% (2011). Largest denominations:
Catholic: 20%
Anglican: 9.8%
Uniting Church: 2.7%
Presbyterian/Reformed, Baptist, Orthodox, Lutheran, Pentecostal – each 1–2%.
"No religion" rose to 39%. Christianity remains the largest religious group but declining.