We're getting older and shunning religion: This is what the 2016 census says about us.

Australians are getting older, turning their their backs on religion and welcoming more migrants from Asia than from Europe. Results of the 2016 Census, disrupted by cyber attacks, paint a picture of a changing Australia.

The number of Australians older than 65 has grown by nearly 665,000 since the 2011 Census, data released on Tuesday shows.

In the past five years 1.3 million migrants have arrived and for the first time in our history the majority of people born overseas are now from Asia, not Europe.

The proportion of people reporting no religion increased to almost one-third, nearly double the 16 per cent recorded in 2001.

More people identified as Aboriginal and/or Torres Strait Islander and they now account for 2.8 per cent of the population.

NSW remains the most populous state, home to nearly 7.5 million people. It was followed by Victoria and Queensland.

The Australian Capital Territory experienced the largest population growth over the past five years, boosting its population by more than 40,000 - an 11 per cent increase.

Renters are forking out more, with the median household weekly rent rising to $335. The median weekly personal income is $662, compared to a family at $1734.

Australians who own their properties outright fell to 31 per cent, a decline of more than 10 per cent from 25 years ago. The number of same-sex couples increased by 39 per cent from 2011 to 46,800 now. The median age of the couples was 40.

Key stats from this years' Census

* Australia's estimated population at December 31 was 24.4 million people.

* There were 23,717,421 people in Australia on Census night, which included 23,401,892 people who usually live in Australia- an 8.8 per cent increase from 2011. More than 600,000 Australians were travelling overseas.

* NSW remains our most populous state, with 7,480,228 people counted, ahead of Victoria (5,926,624) and Queensland (4,703,193).

* The Australian Capital Territory experienced the largest population growth of any state or territory over the past five years, adding more than 40,000 new residents - an increase of 11 per cent.

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* Greater Sydney is Australia's largest population centre with 4,823,991 people, growing at 1656 every week since the previous Census.

* 1.3 million new migrants have come to Australia since 2011, hailing from some of the 180 countries of birth recorded in the Census, with China (191,000) and India (163,000) being the most common countries of birth of new arrivals.

* Of all Australian residents, just more than a quarter of people (26 per cent) said they were born overseas, with England remaining the most common country of birth other than Australia. For the first time in our history, the majority of people born overseas are now from Asia, not Europe.

* We remain a predominantly an English speaking country, with 72.7 per cent of people reporting they speak only English at home. Tasmania had the highest rate of people speaking only English at home with 88 per cent, while the Northern Territory had the lowest rate at 58 per cent.

* Australia also remains a predominantly religious country, with 60 per cent of people reporting a religious affiliation. However, the proportion of people reporting no religion increased to 30 per cent in 2016 - up from 22 per cent five years ago, and nearly double the 16 per cent in 2001.

* Australians are getting older with 664,473 additional people aged 65 and over since 2011.

What do you think about these findings?