Social Isolation in Australia Has Nearly Doubled in Just Two Decades, New Study Finds

Australians are becoming significantly more socially isolated than they were two decades ago, according to new research from the University of Sydney, with social isolation rates nearly doubling since 2001.

The study, published today in the International Journal of Epidemiology, draws on 23 years of nationally representative data, offering some of the clearest long-term evidence yet on how connected, or disconnected, Australians actually are.

Isolation vs. Loneliness: Two Different Things

Before diving into the numbers, it helps to understand a key distinction the researchers drew between two related but separate experiences.

Term	What It Actually Means
Social isolation	An objective state, limited social contact, engagement or meaningful relationships
Loneliness	A subjective feeling that your relationships fall short of what you want

In simple terms, isolation is about how much contact someone actually has. Loneliness is about how that person feels about it. And according to this research, one of these has been rising far faster than the other.

The Headline Numbers

Lead author Dr Neta Hagani, from the University of Sydney's School of Public Health, said the scale of the increase in isolation was striking.

"Our study showed that social isolation has increased substantially in Australia over the past two decades, nearly doubling from 16.9 percent in 2001 to 29.9 percent in 2023," Hagani said.

Loneliness told a somewhat different story, rising more gradually overall.

"Loneliness showed a more moderate increase overall from 6.3 percent to 8.4 percent, disproportionally affecting vulnerable populations," Hagani said.

Here's how both measures shifted over the full study period:

Measure	2001/2002	2023	Change
Episodic social isolation	16.9%	29.9%	Nearly doubled
Chronic social isolation	10.3%	20.5%	Approximately doubled
Chronic loneliness	6.3%	8.4%	Gradual increase

Interestingly, loneliness did not rise in a straight line. It actually declined during the 2000s before climbing again from the 2010s onward, a pattern distinct from the steady upward climb seen in isolation.

Who Is Affected Most

The research identified clear patterns in who is experiencing these trends most acutely, and the two issues do not always affect the same groups equally.

Younger adults saw some of the sharpest increases in loneliness specifically, rising by around 30 percent. Older adults, meanwhile, consistently recorded the highest overall levels of social isolation and saw the largest increases over time.

Beyond age, several other factors were consistently linked to higher rates of both isolation and loneliness:

• Being unemployed
• Living in a more socioeconomically disadvantaged area
• Being widowed
• Living alone
• Having lower levels of education

Not Just a Pandemic Effect

One important finding worth highlighting: researchers ran multiple sensitivity analyses specifically to check whether these trends were simply a result of COVID-19 disruption. They were not.

The overall trends held up as robust and could not be explained solely by the pandemic, indicating a longer, steadier shift in how connected Australians are to one another, one that predates COVID-19 and has continued well beyond it.

Why Researchers Say This Matters

Senior author Professor Melody Ding, also from the University of Sydney, argued the findings point to something bigger than individual circumstances.

"Social connection should be viewed as a public health issue, not merely a personal one," Ding said.

She said the data suggests that structural and social factors, things like employment, housing, community participation and neighbourhood disadvantage, are playing a real role in shaping how connected people are across the population.

"There are no signs of closing the gap, and in most cases, there seems to be a trend for widening gaps," Ding said.

She also pointed to Australia's broader trend of widening social inequality over the past two decades as a possible contributing factor to the country's weakening social connections.

Why This Isn't Just an Individual Issue

Both loneliness and social isolation are linked to poorer physical and mental health outcomes over time, which is part of why researchers are framing this as a matter for policy and public health rather than something individuals should simply be expected to manage on their own.

Professor Ding was direct about what she believes needs to happen next.

"Social isolation and loneliness can have potential long-term health impacts, highlighting the need for sustained policy and public health action across the life course," Ding said.

What This Means Going Forward

With clear evidence that certain groups, particularly young adults, older adults, unemployed people, and those in disadvantaged areas, are being affected most, the researchers suggest these populations may need targeted support to help maintain meaningful social connections going forward.

Whether that translates into specific policy action remains to be seen, but this study now provides something Australia has largely lacked until now: robust, long-term national evidence confirming that social disconnection is a real and growing trend, not simply a perception shaped by recent global events.

This article is based on research published in the International Journal of Epidemiology by researchers at the University of Sydney.

This is a sensitive topic for some readers. If loneliness or isolation is something you're personally experiencing, support is available through Lifeline Australia on 13 11 14.