Atheism, agnosticism, scepticism, freethought, secular humanism or general irreligion are increasing in Australia.[4] Post-war Australia has become a highly secularised country.[5] Religion does not play a major role in the lives of much of the population.[6]
In the country's 2021 census, 38.9% of Australians (or 9,886,957 people) selected either "no religion" or specified their form of irreligion, almost nine percent higher (and 2,846,240 more people) than the 2016 census. 7.2% did not state their religion, or gave an unclear response, meaning that over 46% of Australians did not state a religious affiliation in the 2021 census, a 6.4% increase from the last census.[7]
When asked of their religious affiliation in the 2016 census, 29.6% of Australians (or 6,933,708 people) selected "no religion." This was more than seven percent higher (and 2,240,546 more people), than in the 2011 census. Additionally, in 2016, another 0.5% instead opted to specify their form of irreligion, writing it under "other," hence resulting in 30.1% of Australians (or just over 7,040,700 people) selecting "no religion."[1] A further 9.6% either did not state a religion, or gave a response that was unclear, meaning that 39.7% of Australians did not expressly state a religious affiliation in the 2016 census.[8]
In the 2011 census, 22.3% of Australians (or 4,796,787 people) described themselves as having "no religion." This was more than three percent higher (and 1,090,232 people more) than in the 2006 census and was the second largest category.[8] Another 2.014 million (9.4%) were in the "not-stated or inadequately-defined" category: so more than 31% of Australians did not state a religious affiliation in the 2011 census.[9]
In the 2006 census, 18.7% of Australians (or 3,706,555 people) had described themselves as having "no religion." This was three percent higher than in the 2001 census and was the largest growth in total number of any religious option in that census (800,557 people).[4] A further 2.4 million (11.9%) did not state a religion (or inadequately described it).[10] So just over 30% of Australians did not state a religious affiliation in the 2006 census.
In a 2004 worldwide study by Pippa Norris and Ronald Inglehart, 25% of Australians stated they do not believe in any gods.[11]
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