This statistic shows the median age of the population in Australia from 1950 to 2100. The median age of a population is an index that divides the population into two equal groups: half of the population is older than the median age and the other half younger. In 2020, the median age of Australia's population was 36.9 years.

Civilian Population: 15 Years & Over: 15-24 Years data was reported at 1,699.100 Person th in Mar 2025. This records an increase from the previous number of 1,693.027 Person th for Feb 2025. Civilian Population: 15 Years & Over: 15-24 Years data is updated monthly, averaging 1,375.008 Person th from Feb 1978 (Median) to Mar 2025, with 566 observations. The data reached an all-time high of 1,699.100 Person th in Mar 2025 and a record low of 1,258.857 Person th in Jun 1995. Civilian Population: 15 Years & Over: 15-24 Years data remains active status in CEIC and is reported by Australian Bureau of Statistics. The data is categorized under Global Database’s Australia – Table AU.G001: Civilian Population: by Age, Sex and Status.

In June 2022, it was estimated that around 7.3 percent of Australians were aged between 25 and 29, and the same applied to people aged between 30 and 34. All in all, about 55 percent of Australia’s population was aged 35 years or older as of June 2022. At the same time, the age distribution of the country also shows that the share of children under 14 years old was still higher than that of people over 65 years old. A breakdown of Australia’s population growth Australia is the sixth-largest country in the world, yet with a population of around 26 million inhabitants, it is only sparsely populated. Since the 1970s, the population growth of Australia has remained fairly constant. While there was a slight rise in the Australian death rate in 2022, the birth rate of the country decreased after a slight rise in the previous year. The fact that the birth rate is almost double the size of its death rate gives the country one of the highest natural population growth rates of any high-income country.
National distribution of the population Australia’s population is expected to surpass 28 million people by 2028. The majority of its inhabitants live in the major cities. The most populated states are New South Wales, Victoria, and Queensland. Together, they account for over 75 percent of the population in Australia.

In a survey conducted in Australia in 2021, the average age that young respondents aged 14 to 18 years reported first experiencing vaginal sex was **** years. The average age for first viewing pornography was **** years.

In 2022, the average female age at marriage was 27.5 years in Australia. The average at separation from their married partner was 39.8 years, and for divorce, the average age was 43.7 years.

The average age at which Australians got married for the first time increased for both men and women between 1997 and 2021. As of 2021, males who married for the first time were on average 30.8 years old, while females were on average slightly younger at 29.4 years old.

first time marriage

Wedding bells chime

The most popular months to get married in 2017 were October and November, with many Australians opting to have their wedding in spring. In fact, over 20 percent of couples chose their wedding date based on a preference for a specific season.

In 2017, amendments to the Marriage Act meant that same-sex couples in Australia could also get legally married. This may change marriage figures in the years immediately following, with many long-term same-sex couples choosing to get married with this law change.

Happily ever after?

While the average age of first marriages has increased, the number of Australians tying the knot has decreased, with the crude marriage rate decreasing continuously across the country. The divorce rate has decreased over the years, largely related to the reduction in the number of marriages overall. In 2017, almost half of all divorces in Australia involved children; this share has not changed significantly over the past five years.

Civilian Population: 15 Years and Over: Male data was reported at 11,168.540 Person th in Mar 2025. This records an increase from the previous number of 11,144.123 Person th for Feb 2025. Civilian Population: 15 Years and Over: Male data is updated monthly, averaging 7,509.217 Person th from Feb 1978 (Median) to Mar 2025, with 566 observations. The data reached an all-time high of 11,168.540 Person th in Mar 2025 and a record low of 5,173.602 Person th in Feb 1978. Civilian Population: 15 Years and Over: Male data remains active status in CEIC and is reported by Australian Bureau of Statistics. The data is categorized under Global Database’s Australia – Table AU.G001: Civilian Population: by Age, Sex and Status. Civilian Population refers to all usual residents of Australia aged 15 years and over except members of the permanent defence forces, certain diplomatic personnel of overseas governments customarily excluded from census and estimated population counts, overseas residents in Australia, and members of non-Australian defence forces (and their dependants) stationed in Australia.

This dataset, released December 2016, contains Median age at death of males, 2010 to 2014; Median age at death of females, 2010 to 2014; Median age at death of persons, 2010 to 2014; The data is by Population Health Area (PHA) 2016 geographic boundaries based on the 2016 Australian Statistical Geography Standard (ASGS).

Population Health Areas, developed by PHIDU, are comprised of a combination of whole SA2s and multiple (aggregates of) SA2s, where the SA2 is an area in the ABS structure.

For more information please see the data source notes on the data.

Source: Data compiled by PHIDU from deaths data based on the 2010 to 2014 Cause of Death Unit Record Filessupplied by the Australian Coordinating Registry and the Victorian Department of Justice, on behalf of the Registriesof Births, Deaths and Marriages and the National Coronial Information System.

AURIN has spatially enabled the original data. Data that was not shown/not applicable/not published/not available for the specific area ('#', '..', '^', 'np, 'n.a.', 'n.y.a.' in original PHIDU data) was removed.It has been replaced by by Blank cells. For other keys and abbreviations refer to PHIDU Keys.

Since 1960, age distribution across Australia's population has observed a fairly significant change. The share of the population below 14 years has dropped from over 30 percent to less than 20 percent; while the share aged over 65 has almost doubled. However, Australia's under-14 population is still larger than its over-65 population. The bulk of the population is aged between 15 and 64 years, and this group had its largest share of the population in 2009 when it made up over two-thirds of the entire population. This gradual change has come as a result of decreasing fertility and higher life expectancy, causing the average age of the population to rise.

Civilian Population: 15 Years & Over: 40-44 Years data was reported at 1,894.543 Person th in Mar 2025. This records an increase from the previous number of 1,888.899 Person th for Feb 2025. Civilian Population: 15 Years & Over: 40-44 Years data is updated monthly, averaging 1,472.048 Person th from Feb 1978 (Median) to Mar 2025, with 566 observations. The data reached an all-time high of 1,894.543 Person th in Mar 2025 and a record low of 766.994 Person th in Feb 1978. Civilian Population: 15 Years & Over: 40-44 Years data remains active status in CEIC and is reported by Australian Bureau of Statistics. The data is categorized under Global Database’s Australia – Table AU.G001: Civilian Population: by Age, Sex and Status.

Graph and download economic data for Infra-Annual Labor Statistics: Working-Age Population Total: From 15 to 64 Years for Australia (LFWA64TTAUA647N) from 1978 to 2024 about working-age, 15 to 64 years, Australia, and population.

UIS: Mean years of schooling (ISCED 1 or higher), population 25+ years, both sexes in Australia was reported at 12.51 Years in 2018, according to the World Bank collection of development indicators, compiled from officially recognized sources. Australia - Mean years of schooling of the population age 25+. Total - actual values, historical data, forecasts and projections were sourced from the World Bank on July of 2025.

The estimated resident population (ERP) is the official measure of the Australian population. This dataset contains annual ERP by country of birth, age and sex at the Australia level. At the state/territory level it is available for Census years only.

Motor Vehicles Registration: Estimated Average Age: South Australia data was reported at 12.000 Year in 2021. This records an increase from the previous number of 11.794 Year for 2020. Motor Vehicles Registration: Estimated Average Age: South Australia data is updated yearly, averaging 11.400 Year from Jan 2001 (Median) to 2021, with 21 observations. The data reached an all-time high of 12.000 Year in 2021 and a record low of 11.000 Year in 2009. Motor Vehicles Registration: Estimated Average Age: South Australia data remains active status in CEIC and is reported by Australian Bureau of Statistics. The data is categorized under Global Database’s Australia – Table AU.TA004: Motor Vehicles Registration: Estimated Average Age: by Type and State (Discontinued).

This horizontal bar chart displays median age (year) by currency using the aggregation average, weighted by population in Australia and New Zealand. The data is filtered where the date is 2021. The data is about countries per year.

This horizontal bar chart displays median age (year) by continent using the aggregation average, weighted by population in Australia and New Zealand. The data is filtered where the date is 2021. The data is about countries per year.

This scatter chart displays median age (year) against birth rate (per 1,000 people) in Australia. The data is about countries per year.

In 2022, the average male age at marriage was 29.8 years in Australia. The average at separation from their married partner was 42.6 years, and for divorce, the average age was 46.7 years.

Graph and download economic data for Infra-Annual Labor Statistics: Working-Age Population Total: From 15 to 24 Years for Australia (LFWA24TTAUQ647S) from Q2 1978 to Q1 2025 about 15 to 24 years, working-age, Australia, and population.

Graph and download economic data for Infra-Annual Labor Statistics: Working-Age Population Female: From 15 to 24 Years for Australia (LFWA24FEAUM647N) from Feb 1978 to May 2025 about 15 to 24 years, working-age, Australia, females, and population.