It may not stop the nation like the Melbourne Cup but it does give Australians pause for thought every five years.
The Census of Population and Housing is this nation’s biggest logistical undertaking outside of wartime, according to Dr Liz Allen of the Australian National University’s Centre for Social Policy Research.
Completing the Census may seem like an unavoidable chore for Australia’s 11 million households but members of one group can barely hide their excitement as it approaches on Tuesday, 11 August: demographers like Allen and Mark McCrindle.
“I get pretty charged up about it,” McCrindle, the founder and principal of the Australian social research, demographics and trends consultancy McCrindle told the recent Morningstar Investment Conference 2026.
“It's exciting every time there's new Census data coming out. Put it in the diary.”
More than a headcount
Australia’s population came in at 25,422,788 people at the time of the last Census on August 2021, but it is more than a statistical headcount.
McCrindle, Allen and their fellow population researchers see the results of the questionnaire as a national snapshot, while policymakers use it as a planning tool.
Not far behind them in terms of interest are economists and other financial market participants who interpret the results to understand the forces shaping growth, housing demand and investment flows.
Although equities, bonds and currency markets are typically driven by economic statistics like inflation, employment data and central bank commentary, economists and demographers view the count as important.
“It provides a sort of a thorough snapshot of the economy at a point in time. Where people are living, how much they’re earning, whether they’re living in homes, whether they rent, and so on,” AMP Chief Economist Shane Oliver told Azzet.
Although that snapshot is not useful for predicting the next move by the Reserve Bank of Australia (RBA), it is increasingly significant for understanding the context in which investment decisions are made.
“It’s not going to give us any guide to the economic cycle or what interest rates may do,” Oliver said. “But it does provide some guide as to longer-term trends.”
Oliver nominated housing affordability as one of the most closely watched Census indicators in financial modelling.
“It’s been in a long-term downtrend. As housing affordability deteriorates, people can’t afford their own home and are increasingly renting, which drives the decline in home ownership,” he said.
Such a shift had implications beyond social policy, with increasing demand for rental properties affecting institutional real estate strategies, yields and expectations about construction, which in turn flow into investment and equity markets.
Important for markets
McCrindle said this was why Census data was more relevant to investors than many realised.
He will not be focused on a single statistic but rather on the direction of movement: where people are going, how they are living, and what this means for services, housing and infrastructure demand.
“Areas that grow attract more infrastructure investment and business activity and housing development,” McCrindle said.
For example, demographic change was providing investment opportunities in regions with strong population growth, like South-East Queensland and Western Australia.
Oliver said professional investors were increasingly incorporating demographic datasets into long-term modelling.
“It is a lens that they bring. The smart money does that because they recognise the power that it presents,” he said.
Given the last Census was during the height of COVID-19 in 2021, Oliver sees the upcoming release as providing the first clean indication of how post-pandemic Australia has settled.
“That was in the second year of the pandemic. So it’s quite conceivable that things may have changed,” he said.
Those changes included hybrid work, migration and the number and composition of households, all of which influenced office demand, transport usage and retail patterns.
McCrindle did not expect the ‘top-line’ results of the count to be published until around March 2027.
Family snapshot
Oliver said that although the data did not move markets when released, it fed directly into the models that did.
“We use it for longer-term trends in the economy. It builds a more detailed picture compared to shorter-dated monthly or quarterly data,” he said.
Those models underpin assumptions about housing supply, productivity, labour force participation and long-run growth, which in turn feed into valuation frameworks for equities, bonds and property.
Allen said the Census was important as the foundation of all other data and the “gold standard” of data collection.
“Everything leads back to the Census. It is the basis for sample surveys and knowledge formation. To derive a sample survey, you need to know the total population,” she said.
Allen likened it to a family photograph, describing it as “a snapshot of who we are in a moment”.
She also warned that without a Census, minority groups risk being overlooked, and regional data would become less reliable.
“Demography is destiny and the Census is how we see that destiny taking shape,” McCrindle said.
