The Australian 2021 census is expected to be like no other in the history of data collection. 

Demographer Liz Allen, from the Australian National University's Centre for Social Research and Methods said, "Census 2021 is among the most impactful censuses of our time, not just because of what it collects and the timing of its collection, but what it means for our future."

This is because of how it rolls out, what it will say, and how it will help inform Australia's ongoing responses to the COVID-19 pandemic.