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
2018
Released
29/08/2019

Key statistics

  • The median age for capital cities (35.9 years) was younger than the rest of Australia (41.1).
  • The oldest capital was Hobart with a median age of 39.7 years.
  • 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 24 years made up 38% of the combined capital city population, compared with 30% of the population in the rest of Australia.
  • Older adults aged 45 years and over made up a smaller proportion of the population in capital cities (37%) than in the rest of Australia (45%).
  • 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 39.7 years, ahead of Adelaide at 38.8.
  • Darwin was the youngest capital city with a median age of 33.9 years, followed by the Australian Capital Territory at 35.1.
  • Adelaide had the lowest sex ratio of all capital cities (96.7 males per 100 females), while Darwin had the highest (110.9). 
Capital cityMedian age (years)Sex ratio
Sydney35.898.9
Melbourne35.697.9
Brisbane35.497.8
Adelaide38.896.7
Perth36.498.9
Hobart39.799.1
Darwin33.9110.9
Canberra35.198.0
Total capital cities35.998.3
Total Australia37.398.4

Regions

Median age

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

  • Tea Gardens - Hawks Nest (62.7 years) and Tuncurry (61.1) in New South Wales
  • Bribie Island (60.0) and Cooloola (59.5) in Queensland

The areas with the lowest median ages were: 

  • Acton (21.6 years) and Duntroon (22.3) in the Australian Capital Territory, which had large populations of students or military personnel
  • Yarrabah (22.8) and Northern Peninsula (23.2) in Queensland, which had high proportions of Aboriginal and Torres Strait Islander people

Areas with the oldest median ages

Areas with the youngest median ages

Sex ratio

The areas with the highest sex ratios were: 

  • Howard Springs (306.3 males per 100 females) in Darwin, which contains the Darwin Correctional Centre
  • East Pilbara (292.1) and Ashburton (245.1) in Western Australia, which are areas with significant mining activity

The areas with the lowest sex ratios were:

  • Deakin (82.0 males per 100 females) in the Australian Capital Territory and Mosman Park - Peppermint Grove (84.6) in Perth, which both also contain boarding schools for girls
  • the Sydney areas of Woollahra (82.4), and Castle Hill - East (84.7) which has a relatively high number of aged care residents, reflecting 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. 
  • 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 (40%).

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 to pursue work and education.
  • 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

  • Greater Perth had a lower proportion of its population aged less than 15 years (19%) compared with the rest of Western Australia (21%).
  • Conversely, Perth had a higher proportion aged 15 to 34 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 (29%) than for Australia (35%). 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 as a whole (40%). This partly reflects a trend of adults in this age group moving to 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 25 years and above (68%) compared with the rest of the Northern Territory (62%).

Median age

Sex ratio

Australian Capital Territory

  • The proportion of young adults in the Australian Capital Territory was relatively high compared with Australia, reflecting the number of people in this age group who move there for tertiary 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

Data downloads

Data cubes

Population estimates by age and sex, regions of Australia (ASGS 2016), 2018

Population estimates by age and sex, summary statistics (ASGS 2016), 2013 and 2018

Population estimates by age and sex, Local Government Areas (ASGS 2018), 2018

Population estimates by age and sex, summary statistics - Local Government Areas (ASGS 2018), 2018

Geopackages

Population estimates by age and sex, Statistical Areas Level 2 (ASGS 2016), 2018, in GeoPackage

Population estimates by age and sex, Local Government Areas (ASGS 2018), 2018, in GeoPackage

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