Why Australian Women Outnumber Men Three to One at Age 100

Why Australian Women Outnumber Men Three to One at Age 100

Why Australian Women Outnumber Men Three to One at Age 100

The three-to-one gap appears at age 100

Men slightly outnumber women at birth in Australia, but the balance gradually changes with age.

By the time Australians reach the most extreme end of the age spectrum, women have a substantial numerical advantage.

Recent mortality data show that among Australians who died aged 100 or older in 2024, women outnumbered men by more than three to one. It is one of the clearest demonstrations of Australia’s longstanding longevity gap between the sexes.

Older Australian women and a man walking outdoors, illustrating the female longevity advantage among people reaching very old age.

Understanding Australia’s longevity gap

  • The three-to-one gap appears at age 100
  • What the latest Australian figures show
  • Why women tend to live longer
  • The gap starts well before 100
  • Living longer does not always mean healthier
  • Australia’s centenarian population is growing
  • Why the numbers matter beyond curiosity
  • What individuals can actually control
  • Frequently asked questions
  • References

The numbers at a glance

  • Female life expectancy: 85.1 years
  • Male life expectancy: 81.1 years
  • Female deaths aged 100+ in 2024: 2,227
  • Male deaths aged 100+ in 2024: 669
  • Female-to-male ratio among those deaths: approximately 3.3 to 1
  • Population trend: Australians aged 85 and over are expected to increase rapidly over coming decades

The difference is not that women suddenly become more resilient at their 100th birthday.

It is the result of mortality differences accumulating across an entire lifetime.

What the latest Australian figures show

Australian Institute of Health and Welfare figures for 2024 recorded 2,896 deaths among Australians aged 100 and over.

Of those:

  • 2,227 were female
  • 669 were male

That means female centenarian deaths outnumbered male centenarian deaths by approximately 3.3 to one.

The figures are consistent with a pattern Australia has observed for decades.

Australian Bureau of Statistics data from 2015, for example, estimated about 4,400 people aged 100 or over living in Australia at the time. Approximately 3,400 were women and 1,000 were men.

Again, women outnumbered men by more than three to one.

The precise numbers change from year to year, but the broader pattern has remained remarkably persistent.

Why women tend to live longer

There is no single explanation for the longevity gap.

Researchers generally point to a mixture of biology, behaviour, health risks and social factors.

Biological differences

Sex-related biological factors appear to play some role in survival.

Hormonal differences, genetics and immune-system responses have all been investigated as possible contributors to female longevity.

Women have two X chromosomes, while men generally have one X and one Y chromosome. Researchers have proposed that having two X chromosomes may provide some protection against certain harmful genetic variants.

Hormonal factors may also influence cardiovascular health, particularly earlier in adult life.

None of these mechanisms means that longevity is predetermined, however.

Biology is only part of the story.

Different patterns of risky behaviour

Across populations, men historically have been more likely to engage in several behaviours associated with premature death.

These can include:

  • smoking
  • hazardous alcohol consumption
  • dangerous driving
  • occupational risk
  • interpersonal violence
  • other higher-risk activities

The size of these differences varies by generation and community, but their effects accumulate across decades.

Men experience higher mortality at many ages

The longevity difference does not begin in old age.

Australian mortality data generally show higher death rates for males across many age groups.

By the time a population reaches its 80s, 90s and eventually 100s, those earlier differences have progressively changed the balance between men and women who remain alive.

This is why the female advantage becomes particularly visible at extreme ages.

The gap starts well before 100

Looking only at centenarians can make the difference appear sudden.

It is not.

In 2024, male deaths outnumbered female deaths through most younger and middle age groups.

The pattern eventually reverses among Australia’s oldest people because a greater proportion of women survive into those ages.

For people aged 95 to 99 in 2024, Australia recorded:

  • 9,275 female deaths
  • 4,623 male deaths

Among people aged 90 to 94:

  • 15,798 female deaths
  • 11,564 male deaths

By comparison, the numbers were much closer for those aged 85 to 89:

  • 16,204 female deaths
  • 15,952 male deaths

This gradual transition illustrates what is happening.

It is not simply that women have more deaths at extreme ages. More women have survived long enough to reach those ages in the first place.

Life expectancy tells the same story

Australian life expectancy remains among the highest internationally.

For 2022–2024, life expectancy at birth was:

Sex Life expectancy
Women 85.1 years
Men 81.1 years

That is a difference of about four years.

Historical figures show that the gap used to be even larger.

Australian Institute of Health and Welfare research found that between 1967 and 2021, male life expectancy increased by 13.7 years while female life expectancy increased by 11.2 years.

Men therefore gained ground over that period, even though women continued to live longer on average.

Living longer does not always mean healthier

Longevity should not be confused with spending every additional year in perfect health.

Older people are more likely to experience chronic conditions, disability, reduced mobility or a need for assistance.

Women can therefore experience what researchers sometimes describe as a longevity-health paradox: they tend to live longer, but may spend more years managing health conditions.

This matters when interpreting the three-to-one figure.

Being more likely to reach 100 is noteworthy, but longevity alone does not describe:

  • quality of life
  • independence
  • cognitive health
  • mobility
  • social connection
  • financial security
  • access to care

A meaningful discussion about ageing needs to consider both lifespan and healthspan.

Australia’s centenarian population is growing

Reaching 100 was once extraordinarily unusual.

It is becoming less so.

Australian Institute of Health and Welfare research found that centenarian deaths increased dramatically between 1964 and 2021.

In 1964, approximately one in every 1,214 Australian deaths involved a person aged 100 or older.

By 2021, that had increased to about one in every 72 deaths.

In raw numbers, centenarian deaths rose from 83 in 1964 to 2,247 in 2021.

That does not mean human beings are suddenly reaching dramatically higher maximum ages.

Instead, far more people are surviving into their 90s and early 100s.

Living past 110 remains extremely rare

The number of people reaching 100 has grown rapidly, but surviving another decade beyond that remains unusual.

People aged 110 or more are sometimes called supercentenarians.

Australian data show that deaths at these extreme ages remain rare.

The oldest validated Australian woman, Christina Cock, lived to 114.

Australia’s longest-lived validated man, Dexter Kruger, reached 111.

Interestingly, the maximum recorded lifespan has not increased nearly as dramatically as average life expectancy.

Modern health improvements have helped far more people avoid premature death and survive into old age, but they have not produced a comparable increase in the absolute maximum human lifespan.

Why Australia’s ageing population makes this important

Centenarians are a small group, but they are part of a much larger demographic transformation.

Australia’s population is getting older.

Around one in six Australians is already aged 65 or over.

The Australian Institute of Health and Welfare projects that the number of people aged 85 and over could rise from about 603,000 in 2024–25 to approximately 1.9 million by 2065–66.

That is more than a threefold increase.

This has consequences for:

  • aged care
  • healthcare
  • housing
  • retirement income
  • transport
  • accessible communities
  • informal carers
  • social services

It also means that understanding gender differences in ageing is increasingly important.

Why the numbers matter beyond curiosity

Knowing that women are much more likely to reach extreme old age has practical implications.

Retirement planning

Women may need retirement savings to last longer on average.

That matters because longevity intersects with other financial factors, including career interruptions, caring responsibilities and lifetime earnings.

Aged-care planning

If more women survive into their late 90s and 100s, aged-care systems can expect women to represent a particularly large proportion of their oldest clients.

Living arrangements

Longer female survival also means older women are more likely to spend part of later life without a surviving partner.

Housing, social isolation and community support can therefore become significant issues.

Preventive health for men

The other side of the statistic deserves equal attention.

The female longevity advantage highlights potentially preventable male deaths earlier in life.

Improved prevention, earlier healthcare engagement and reductions in smoking, harmful alcohol use and other risk factors can influence the gap.

What individuals can actually control

Nobody can guarantee living to 100.

Genetics, environment, socioeconomic circumstances, medical history and chance all play roles.

But population research consistently points towards several behaviours associated with healthier ageing.

A practical healthy-ageing checklist

  • Don’t smoke.
  • Keep physically active within your abilities.
  • Maintain regular medical care and recommended screening.
  • Manage blood pressure, cholesterol and other cardiovascular risks.
  • Limit harmful alcohol consumption.
  • Maintain social relationships.
  • Eat a varied, nutritionally adequate diet.
  • Protect sleep.
  • Stay mentally and socially engaged.
  • Seek medical attention rather than delaying care when something appears wrong.

These behaviours cannot promise extreme longevity.

They can, however, influence risks that affect both lifespan and quality of life.

The bigger lesson behind the three-to-one figure

The striking statistic is not simply that women “win” at ageing.

It reveals how small differences in mortality across adulthood compound over decades.

At younger ages, Australia’s population is relatively balanced between men and women.

At 85, the difference becomes clearer.

By 95, women significantly outnumber men.

And at 100, the gap becomes dramatic.

Australia’s growing population of centenarians therefore tells two stories at once: people are living longer than previous generations, and women remain considerably more likely than men to reach the most advanced ages.

Frequently asked questions

Do Australian women really outnumber men three to one at age 100?
Australian data have repeatedly shown a female-to-male ratio of more than three to one at extreme old ages. In 2024, there were 2,227 female deaths among people aged 100 or older compared with 669 male deaths.

How long do Australian women live on average?
Life expectancy at birth for Australian females was 85.1 years in 2022–2024.

What is life expectancy for Australian men?
Life expectancy at birth for Australian males was 81.1 years in 2022–2024.

Why do women generally live longer than men?
There is no single cause. Biological differences, health behaviours, occupational risks, smoking, alcohol use and patterns of healthcare use can all contribute.

How many Australians are living beyond 100?
The number changes each year, but Australia’s centenarian population has increased dramatically over recent decades as more people survive into advanced old age.

Is 100 becoming a normal lifespan?
No. Reaching 100 remains uncommon, even though it is considerably more frequent than it was several decades ago.

What is a supercentenarian?
A supercentenarian is someone who reaches at least 110 years of age. This remains extremely rare.

Australian ageing and longevity resources

By: Steven Irizarry
Why trust this: This article draws on Australian Bureau of Statistics and Australian Institute of Health and Welfare data covering longevity, deaths and Australia’s ageing population.
Last updated: 2026-10-02
Disclosure: Independent editorial coverage. Population and mortality statistics are updated periodically and may change with later releases.

References