WA's population has bucked the national trend, with a falling share of millennials compared to baby boomers.
And even though millennials still make up a greater proportion of the state than the older cohort, the state's average age is increasing.
There's lots more we found out about WA from today's census data drop.
Here are the six key takeaways.
WA's population is growing older, and more slowly
Since 2016, WA's population has grown by 185,612, or 7.5 per cent. That is slightly slower than the national growth of 8.6 per cent.
And like the rest of the country, WA is getting older, with the median age now 38.
As a whole, millennials and baby boomers now account for roughly the same proportion of Australia's population.
But in WA, the proportion of millennials has fallen from 22.4 per cent in 2016, to 21.6 per cent in 2021.
They're still a bigger group than baby boomers though, who have grown from 19.5 to 21.1 per cent.
On the whole, it means more than one in five West Australians are now aged over 60.
Nationally, the number of people identifying as Aboriginal and/or Torres Strait Islander has jumped by 25 per cent – but in WA it is slightly lower at 17 per cent.
The median age of Aboriginal and Torres Strait Islander West Australians is now 24.
Our family demographics are changing
More West Australians were born in Australia compared to 2016, with that group now accounting for 62 per cent of people compared to 60.3 per cent.
The figure has grown at more than eight times the national rate, which now sits at 66.9 per cent.
The share of people in WA who were born in England and New Zealand has fallen, but the percentage from India and the Philippines has risen.
Going back a generation, a greater proportion of people in WA had both of their parents born overseas, up to 41.6 per cent from 40.5 per cent in 2016.
WA loses faith faster
One of the big stories to come from this year's census is the number of people turning away from religion.
And West Australians did just that, at a rate just above the nation as a whole, with 42.5 per cent of Sandgropers now reporting no religion, compared to 32.5 in 2016.
The share of people reporting they are Christian, but without further description, remains steady at 3.4 per cent, higher than the national rate of 2.7 per cent.
West Australians are getting richer
On the whole, West Australians are becoming wealthier, with the share of homes earning less than $650 a week falling to 16.3 per cent, and more than a quarter earning more than $3,000.
Mortgage repayments are also, on average, taking up a lesser share of West Australians' budgets.
An extra 13,000 apartments have been added to WA's housing stock, but the share of people living in flats remains less than half of the national rate.
And we found out West Australian homes tend to be bigger, with an average of four bedrooms compared to three nationally.
A greater number of West Australians live alone, 25.4 per cent to be precise, while the share of family households has fallen to 71.2 per cent.
The share of people who own their own home is lower in WA than the rest of the nation at 29.2 per cent, just under the 31 per cent national rate.
More unpaid home work, less volunteering
The average number of hours of unpaid domestic work people are doing is also rising.
Fewer West Australians are doing less than five hours of work a week, and more than a quarter are doing between five and 14.
That's much closer to the national rates than it was in 2016.
The pandemic also seems to have had an impact on West Australians' volunteering habits, with a 3.1 per cent drop in the number of people who gave their time to an organisation or group in the last year.
Changing trends in education
The number of West Australians attending TAFE has jumped by about 13,000, but at a rate slightly slower than the rest of the nation.
And compared to the rest of the country, fewer people are attending university in WA at 13.9 per cent, compared to the national rate of 15.4 per cent.
But WA has more children attending preschool (5.6 per cent of the population, compared to 3.9 per cent), and high school (21.8 compared to 20.5 per cent).
