3235.0 - Regional Population by Age and Sex, Australia, 2018 Quality Declaration 
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 29/08/2019   
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Australian Capital Territory

Median age

At June 2018, the median age (the age at which half the population is older and half is younger) in the Australian Capital Territory (ACT) was 35.1 years. This was younger than Australia's median age (37.3 years), and the second youngest of all states and territories after the Northern Territory (32.9).

The Statistical Areas Level 2 (SA2s) with the highest median ages were:

  • Yarralumla (49.9 years) in southern Canberra
  • Isaacs (48.0) and O'Malley (47.1), both in Woden Valley

The areas with the lowest median ages were:
  • Acton (21.6 years) which contains the Australian National University
  • Duntroon (22.3) which has large numbers of defence force personnel

SA2s WITH OLDEST AND YOUNGEST MEDIAN AGES(a), Australian Capital Territory, 2018

Median Age
SA2SA3
years

OLDEST MEDIAN AGES

YarralumlaSouth Canberra
49.9
IsaacsWoden Valley
48.0
O'MalleyWoden Valley
47.1
ChapmanWeston Creek
46.4
StirlingWeston Creek
45.2

YOUNGEST MEDIAN AGES

ActonNorth Canberra
21.6
DuntroonNorth Canberra
22.3
CivicNorth Canberra
25.2
BruceBelconnen
27.3
LawsonBelconnen
28.7

(a) Excludes SA2s with less than 1,000 people.


Sex ratio

At June 2018, there were 98.0 males for every 100 females in the ACT.

The SA2s with the highest sex ratios in the ACT were:
  • Duntroon (229.2 males for every 100 females) which contains the Royal Military College
  • Reid (113.0) in northern Canberra
  • Lawson (112.3), a new suburb in the Belconnen region

The areas with the lowest sex ratios were:
  • Deakin (82.0 males per 100 females) in southern Canberra
  • Acton (86.4) and Ainslie (87.0), both in northern Canberra

SA2s WITH HIGHEST AND LOWEST SEX RATIOS(a), Australian Capital Territory, 2018

Sex Ratio
SA2SA3
males per 100 females

HIGHEST SEX RATIOS

DuntroonNorth Canberra
229.2
ReidNorth Canberra
113.0
LawsonBelconnen
112.3
Red HillSouth Canberra
106.7
PearceWoden Valley
106.5

LOWEST SEX RATIOS

DeakinSouth Canberra
82.0
ActonNorth Canberra
86.4
AinslieNorth Canberra
87.0
PageBelconnen
88.0
NarrabundahSouth Canberra
89.4

(a) Excludes SA2s with less than 1,000 people.


Age and sex distribution

The proportion of young adults for both males and females in the ACT was relatively high compared with Australia as a whole in 2018. This may reflect the number of people in this age group who move to the ACT 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.
AGE AND SEX DISTRIBUTION (%), Australian Capital Territory and Australia - 30 June 2018

Population pyramid showing proportion of population by age and sex in Australian Capital Territory and Australia, 30 June 2018