The median age is the age at which half the population is older and half is younger.
The sex ratio is the number of males per 100 females.
Any reference to capital city refers to Greater Capital City Statistical Area (GCCSA), and any reference to area refers to Statistical Area Level 2 (SA2).
Regional population by age and sex
Statistics about the population by age and sex for Australia's capital cities and regions
Key statistics
- The median age for capital cities (36.5 years) was younger than the rest of Australia (41.4).
- The youngest capital was Darwin with a median age of 34.7 years, while Hobart was the oldest (39.7).
- Darwin was the only capital with more males than females.
Capital cities
- People aged 20 to 49 years made up 44% of the combined capital city population, compared with 36% of the population in the rest of Australia.
- People aged 50 years and over made up a smaller proportion of the population in capital cities (32%) than in the rest of Australia (39%).
- The sex ratio in the combined capital cities was 98.2 males per 100 females, compared with 98.4 for the rest of Australia, indicating a slightly higher share of females in the capitals.
Median age and sex ratio
- Darwin had the youngest median age of all capital cities at 34.7 years, followed by Canberra at 35.9.
- Hobart was the oldest capital city with a median age of 39.7, ahead of Adelaide at 39.1.
- Adelaide had the lowest sex ratio of all capital cities (96.5 males per 100 females), while Darwin had the highest (107.9).
Capital city | Median age (years) | Sex ratio |
---|---|---|
Sydney | 36.3 | 98.9 |
Melbourne | 36.0 | 98.0 |
Brisbane | 36.0 | 97.5 |
Adelaide | 39.1 | 96.5 |
Perth | 37.1 | 98.4 |
Hobart | 39.7 | 99.2 |
Darwin | 34.7 | 107.9 |
Canberra | 35.9 | 97.5 |
Total capital cities | 36.5 | 98.2 |
Total Australia | 37.8 | 98.3 |
Regions
Median age
The areas with the youngest median ages were:
- Acton (22.8 years) and Duntroon (23.3) in the Australian Capital Territory, which had large populations of students or military personnel
- Yarrabah (23.4) and Northern Peninsula (23.9) in Queensland, which had high proportions of Aboriginal and Torres Strait Islander peoples
The areas with the oldest median ages were all popular retirement destinations on the coast including:
- Tea Gardens - Hawks Nest (63.4 years) and Tuncurry (61.1) in New South Wales
- Cooloola (61.4) and Bribie Island (61.1) in Queensland
Areas with the youngest median ages
Areas with the oldest median ages
Sex ratio
The areas with the lowest sex ratios were:
- Woollahra (81.6 males per 100 females) in Sydney and Bowral (83.3) in the Southern Highlands of New South Wales, which both had older age profiles and reflect the longer life expectancy of females
- Deakin (81.9) in the Australian Capital Territory which contained a boarding school for girls
The areas with the highest sex ratios were:
- Howard Springs (308.8 males per 100 females) in Darwin and Wacol (255.0) in Ipswich, which both contained correctional centres for men
- East Pilbara (289.8) and Ashburton (243.6) in Western Australia, which were areas with significant mining activity
Areas with the lowest sex ratios
Areas with the highest sex ratios
New South Wales
- Greater Sydney had a younger age distribution than the rest of New South Wales, reflecting the pattern of young adults moving to capital cities for education and work purposes.
- People aged 20 to 44 years made up 38% of Sydney's population, compared with 28% in the rest of the state.
- People aged 60 years or over made up 20% of Sydney's population, compared with 28% in the rest of New South Wales.
Median age
Sex ratio
Victoria
- Greater Melbourne had a younger age distribution than the rest of Victoria, as younger adults tend to migrate out of regional areas to pursue work and education in the capital city.
- People aged 20 to 44 years made up 39% of the population in Melbourne, compared with 29% in the rest of the state.
- There was a lower proportion of people aged 50 years and over in Melbourne (31%) than in the rest of Victoria (41%).
Median age
Sex ratio
Queensland
- Greater Brisbane had a higher proportion of its population aged 20 to 44 years (37%) than the rest of Queensland (31%), reflecting the pattern of young adults moving to capital cities for work and education purposes.
- In contrast, Brisbane had a lower proportion aged 50 years and over (31%) than the rest of the state (37%).
Median age
Sex ratio
South Australia
- Greater Adelaide had a younger age distribution than the rest of South Australia.
- People aged 20 to 44 years made up 34% of the population in Adelaide, compared with 26% in the rest of the state. This is indicative of young adults moving to the capital city for employment or education purposes.
Median age
Sex ratio
Western Australia
- The proportion of the population aged less than 20 years in Greater Perth (25%) was similar to that in the rest of Western Australia (26%).
- Perth had a higher proportion of its population aged 20 to 39 years (29%) than the rest of the state (24%). This is consistent with young adults moving to the capital city for employment or education purposes.
Median age
Sex ratio
Tasmania
- Tasmania had a lower proportion of people aged 20 to 44 years (30%) than Australia (35%) as a whole. This in part reflects young adults pursuing education and employment opportunities interstate.
- Tasmania also had a higher proportion of people aged 50 years and over (41%) than Australia (34%). This partly reflects a trend of adults in this age group moving into the state.
Median age
Sex ratio
Northern Territory
The Northern Territory had a higher proportion of people aged under 25 years (34%) than Australia (31%) as a whole, indicating a younger population in the territory.
- A lower proportion of Greater Darwin's population was under 25 years of age (32%) compared with the rest of the Northern Territory (38%).
Median age
Sex ratio
Australian Capital Territory
- The Australian Capital Territory had a younger age distribution than Australia as a whole, reflecting the number of young adults who move to the territory for education or employment.
- People aged 20 to 39 years accounted for 32% of the territory's population, compared with 29% of Australia's population.
Median age
Sex ratio
Interactive maps
Regional population by age - interactive maps
These maps display the proportion of the population aged 0-14, 15-64 and 65+ for SA2s and LGAs.
Data downloads
Data cubes
Population estimates by age and sex, by SA2, 2020
Population estimates by age and sex - summary statistics, by SA2 and above, 2020
Includes sex ratio, median age and proportion of population aged 0-14, 15-64 and 65+ for SA2s and above.
Population estimates by age and sex, by LGA, 2020
Population estimates by age and sex - summary statistics, by LGA, 2020
Includes sex ratio, median age and proportion of population aged 0-14, 15-64 and 65+ for LGAs.
Population estimates by age, by selected geographies, 2020
Includes population estimates by selected age groupings for SA2s, LGAs, Postal Areas and Primary Health Networks. Added 03/09/2021.
Geopackages
Population estimates by age and sex, by SA2, 2020, in GeoPackage
Population estimates by age and sex, by LGA, 2020, in GeoPackage
Post-release changes
03/09/2021 - A data cube containing additional age breakdowns for SA2s, LGAs, Postal Areas and Primary Health Networks has been added. Interactive maps have also been added.
Previous catalogue number
This release previously used catalogue number 3235.0.