11 May 2026

Obesity Statistics Australia 2026: The Numbers Behind Australia's Weight Crisis

Key Takeaways

65.8% of Australian adults are living with overweight or obesity. This page consolidates the most current and authoritative data on obesity in Australia — prevalence, trends, demographics, and projections.

The Numbers Behind Australia's Weight Crisis

Australia has one of the highest rates of overweight and obesity in the developed world, and the trajectory is still heading in the wrong direction. This page consolidates the most current and authoritative data on obesity in Australia — from population prevalence and demographic breakdowns to healthcare costs and future projections — sourced from the Australian Bureau of Statistics, the Australian Institute of Health and Welfare, and peer-reviewed research.

All figures are current as of 2026 unless otherwise noted.

Overall Prevalence: How Many Australians Are Overweight or Obese?

According to the Australian Bureau of Statistics 2022 National Health Survey — the most recent comprehensive measured data available:

65.8% of Australian adults (aged 18 and over) were living with overweight or obesity — approximately 13 million people
34.0% were in the overweight category (BMI 25–29.9)
31.7% were living with obesity (BMI ≥30)
31.6% were of normal weight
1.6% were underweight

Put simply: almost two-thirds of Australian adults are above a healthy weight. Those with a healthy BMI are now in the minority.

The Trend: How Has This Changed Over Time?

Australia's weight trajectory has been consistently upward for three decades. Data from the Australian Institute of Health and Welfare and ABS surveys show:

In 1995, 19% of Australian adults had obesity. By 2022, this had risen to 31.7% — a two-thirds increase over 27 years
The prevalence of overweight and obesity combined rose from 57.2% in 1995 to 65.8% in 2022
Severe obesity (BMI ≥40) more than doubled — from 2.2% in 2007–08 to 4.6% in 2022–23
The shift has been driven primarily by increases in obesity rates, not overweight rates — indicating progression to more severe weight categories over time

Gender Breakdown

More men than women are in the overweight category: 38.6% of men vs 29.6% of women
Obesity rates are broadly similar by gender: 32.5% of men and 30.9% of women
Severe obesity is predicted to affect women more severely in future projections

Children and Adolescents

The obesity crisis extends significantly into younger age groups. According to AIHW data:

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1 in 4 Australian children and adolescents aged 2–17 (26%) were living with overweight or obesity — approximately 1.3 million young people
Childhood and adolescent obesity rates have generally plateaued since 2007–08, though rates for Indigenous children and adolescents have continued to increase
Children who live with obesity have significantly elevated risk of continuing to do so in adulthood, along with associated metabolic disease

Geographic Distribution: Regional and Rural Australians

Obesity prevalence in Australia is not uniformly distributed. Research published in Scientific Reports (2021) using nationally representative longitudinal data found that geographic remoteness is a significant independent risk factor for obesity. Australians in regional and remote areas consistently show higher rates of overweight and obesity than those in major cities, driven by a combination of socioeconomic factors, reduced access to healthy food options, lower access to healthcare, and physical environment.

Indigenous Australians

Aboriginal and Torres Strait Islander Australians experience disproportionately high rates of obesity and weight-related chronic disease, compounded by historical and ongoing social determinants of health. Obesity-related conditions including type 2 diabetes and cardiovascular disease occur at significantly higher rates and at younger ages in Indigenous populations. This disparity is a recognised priority area for both AIHW and government health policy.

Health Impact: What Does Obesity Cost Australia?

Overweight and obesity are the second leading risk factor for total disease burden in Australia, accounting for 8.4% of the total disease burden — sitting behind only tobacco use. The conditions most significantly linked to obesity include:

Type 2 diabetes — obesity is the primary modifiable risk factor
Cardiovascular disease — including heart attack, stroke, and heart failure
Several cancers — including bowel, breast, kidney, and endometrial cancers
Obstructive sleep apnoea
Osteoarthritis and joint disease
Non-alcoholic fatty liver disease (NAFLD/MASH)
Chronic kidney disease
Mental health conditions — including depression and anxiety

The direct healthcare costs attributable to overweight and obesity in Australia are estimated in the billions of dollars annually, with indirect costs (lost productivity, disability, reduced quality of life) substantially higher.

Projections: Where Is Australia Heading?

Without significant intervention, projections are sobering:

The World Obesity Federation projects that nearly 47% of Australian adults could be living with obesity by 2035 — up from 31.7% today — if current trends continue
Global obesity has more than doubled since 1990 and now affects over 890 million adults worldwide
Australia's adult obesity rate of approximately 32% places it roughly 36th globally — among the highest in the developed world

The Treatment Gap

Perhaps the most significant statistic is the gap between prevalence and treatment. Despite obesity being classified as a chronic disease by the RACGP and major medical bodies globally, access to evidence-based weight management treatment in Australia remains severely constrained by:

Long GP appointment wait times (averaging 4–6 weeks in many regions)
The cost of specialist weight management programs
The absence of PBS subsidies for the most effective weight loss medications (Wegovy, Mounjaro) for most Australians
Persistent clinical stigma — surveys consistently show that many Australians feel dismissed or judged when raising weight concerns with their GP
Geographic barriers for the regional and rural Australians who have the highest obesity rates

Telehealth GP services with bulk billed consultations represent one mechanism for addressing the access gap — bringing evidence-based assessment and treatment to Australians regardless of location and without the cost barrier of private weight management clinics.