Regional population by age and sex

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Statistics about the population by age and sex for Australia's capital cities and regions

Reference period
2020
Released
27/08/2021

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.

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).

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 cityMedian age (years)Sex ratio
Sydney36.398.9
Melbourne36.098.0
Brisbane36.097.5
Adelaide39.196.5
Perth37.198.4
Hobart39.799.2
Darwin34.7107.9
Canberra35.997.5
Total capital cities36.598.2
Total Australia37.898.3

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.
 

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