Ten things we learned from the 2021 census results: Christianity in decline and Australia hits 25 million

Almost half of Australians have a parent born overseas, and more than one in four were born internationally, according to the 2021 census results. Photograph: Dean Lewins/AAP

Cast your mind back to last August and you probably remember filling out the census, alongside millions of other Australians.

The first and biggest release from the 2021 census has come out. It’s the first time since 2016 that Australians will have up-to-date data on the population, and it was completed when much of the country was in lockdown, confined to home.