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Australia

Five year age groups

In 2021, the largest age group in Australia was 30 to 34 year olds. The group that changed the most since 1996 was 60 to 64 year olds, increasing by 413,387 people.

The Age Structure of Australia provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Australia's residential role and function and how it is likely to change in the future.

Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.

To get a more complete picture Australia's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.

Q:

Derived from the Census question:

'What is the person's date of birth or age?'

Age structure - Five year age groups
Australia - Total females (Enumerated)20211996Change
Five year age groups (years)Number%Greater Capital Cities %Number%Greater Capital Cities %1996 to 2021
0 to 4711,2655.55.7615,8616.96.6+95,404
5 to 9771,4286.06.1625,9477.06.6+145,481
10 to 14771,4616.05.9629,0287.06.7+142,433
15 to 19708,4815.55.5610,2206.86.9+98,261
20 to 24772,7136.06.4655,6237.37.8+117,090
25 to 29884,8426.97.3681,9047.68.1+202,938
30 to 34948,6977.48.0702,8937.88.0+245,804
35 to 39937,1207.37.8716,0298.08.0+221,091
40 to 44834,4306.56.8663,9807.47.5+170,450
45 to 49833,4406.56.6625,6677.07.1+207,773
50 to 54823,7766.46.3483,3735.45.4+340,403
55 to 59787,6696.15.8395,1324.44.3+392,537
60 to 64756,9475.95.4343,5603.83.6+413,387
65 to 69672,5535.24.7344,9253.83.6+327,628
70 to 74599,4944.74.2318,7223.63.4+280,772
75 to 79429,2793.33.0240,2362.72.6+189,043
80 to 84302,1402.32.2174,4711.92.0+127,669
85 and over331,8992.62.4140,3301.61.6+191,569
Total population12,877,634100.0100.08,967,901100.0100.0+3,909,733
Source: Australian Bureau of Statistics, Census of Population and Housing 1996 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information

Dominant groups

Analysis of the female five year age groups of Australia in 2021 compared to Greater Capital Cities shows that there was a similar proportion of females in the younger age groups (under 15) and a higher proportion of females in the older age groups (65+).

Overall, 17.5% of the female population was aged between 0 and 15, and 18.1% were aged 65 years and over, compared with 17.7% and 16.4% respectively for Greater Capital Cities.

The major differences between the female age structure of Australia and Greater Capital Cities were:

  • A larger percentage of females aged 65 to 69 (5.2% compared to 4.7%)
  • A larger percentage of females aged 60 to 64 (5.9% compared to 5.4%)
  • A smaller percentage of females aged 30 to 34 (7.4% compared to 8.0%)
  • A smaller percentage of females aged 35 to 39 (7.3% compared to 7.8%)

Emerging groups

From 1996 to 2021, Australia's female population increased by 3,909,733 people (43.6%). This represents an average annual population change of 1.46% per year over the period.

The largest changes in female age structure in this area between 1996 and 2021 were in the age groups:

  • 60 to 64 (+413,387 females)
  • 55 to 59 (+392,537 females)
  • 50 to 54 (+340,403 females)
  • 65 to 69 (+327,628 females)

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