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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
2019
Released
28/08/2020

Key statistics

  • The median age for capital cities (36.0 years) was younger than the rest of Australia (41.2).
  • The oldest capital was Hobart with a median age of 39.6 years, while Darwin was the youngest (34.3).
  • Darwin was the only capital with more males than females.

The median age is defined as the age at which half the population is older and half is younger.
The sex ratio is defined as 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 45% 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 (31%) than in the rest of Australia (39%).
  • In both capital cities and the rest of Australia, there were higher proportions of females than males in the older age groups.
     

Median age and sex ratio

  • Hobart had the oldest median age of all capital cities at 39.6 years, ahead of Adelaide at 38.8.
  • Darwin was the youngest capital city with a median age of 34.3, followed by Canberra at 35.4.
  • Adelaide had the lowest sex ratio of all capital cities (96.7 males per 100 females), while Darwin had the highest (109.9).
     
Capital cityMedian Age (years)Sex ratio
Sydney35.898.9
Melbourne35.698.1
Brisbane35.697.6
Adelaide38.896.7
Perth36.798.7
Hobart39.699.1
Darwin34.3109.9
Canberra35.497.8
Total capital cities36.098.4
Total Australia37.498.4

Regions

Median age

The areas with the oldest median ages were all popular retirement destinations on the coast including:

  • Tea Gardens - Hawks Nest (63.0 years) and Tuncurry (61.2) in New South Wales
  • Bribie Island and Cooloola (both 60.6) in Queensland
     

The areas with the youngest median ages were:

  • Acton (21.9 years) and Duntroon (22.6) in the Australian Capital Territory, which had large populations of students or military personnel
  • Yarrabah (22.8) and Northern Peninsula (23.4) in Queensland, which had high proportions of Aboriginal and Torres Strait Islander peoples
     

Areas with the oldest median ages

Areas with the youngest median ages

Sex ratio

The areas with the highest sex ratios were:

  • Howard Springs (306.2 males per 100 females) in Darwin and Wacol (250.2) in Ipswich, which both contain correctional centres for men
  • East Pilbara (289.5) and Ashburton (243.2) in Western Australia, which are areas with significant mining activity
     

The areas with the lowest sex ratios were:

  • Deakin (80.8 males per 100 females) in the Australian Capital Territory which contains a boarding school for girls
  • Woollahra (81.0) in Sydney and Bowral (84.1) in the Southern Highlands of New South Wales, which both have older age profiles and reflect the longer life expectancy of females
     

Areas with the highest sex ratios

Areas with the lowest 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 39 years made up 32% of Sydney's population, compared with 23% in the rest of the state.
  • People aged 60 years or over made up 19% of Sydney's population, compared with 27% 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 (30%) 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 45 years and over (37%) than the rest of the state (43%).
     

Median age

Sex ratio

South Australia

  • Greater Adelaide had a younger age distribution than the rest of South Australia.
  • People aged 20 to 39 years made up 28% of the population in Adelaide, compared with 21% 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 children aged less than 15 years in Greater Perth (19%) was similar to that in the rest of Western Australia (20%).
  • Perth had a higher proportion of its population aged 15 to 34 years (28%) than the rest of the state (23%). 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 45 years and over (47%) than Australia (40%). This partly reflects a trend of adults in this age group moving into the state.
     

Median age

Sex ratio

Northern Territory

  • Greater Darwin had a lower proportion of its population under 25 years of age (32%) compared with the rest of the Northern Territory (38%).
  • Darwin had a higher proportion of people aged 50 years and over (26%) than the rest of the Northern Territory (23%).
     

Median age

Sex ratio

Australian Capital Territory

  • The proportion of young adults in the Australian Capital Territory was relatively high compared with Australia as a whole, reflecting the number young adults who move to the territory for education or employment.
  • People aged 20 to 39 years accounted for 33% of the territory's population, compared with 29% of Australia's population.
     

Median age

Sex ratio

Interactive map

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More information

Data downloads

Data cubes

Population estimates by age and sex, by SA2, 2019

Population estimates by age and sex - summary statistics, by SA2 and above, 2014 and 2019

Population estimates by age and sex, by LGA, 2019

Population estimates by age and sex - summary statistics, by LGA, 2019

Geopackages

Population estimates by age and sex, by SA2, 2019, in GeoPackage

Population estimates by age and sex, by LGA, 2019, in GeoPackage

Previous catalogue number

This release previously used catalogue number 3235.0.
 

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