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LEARN MORE ABOUT .idIn 2021, the largest age group in Australia was 30 to 34 year olds. The group that changed the most since 2001 was 60 to 64 year olds, increasing by 316,585 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 males (Enumerated) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | Greater Adelaide % | Number | % | Greater Adelaide % | 2001 to 2021 |
| 0 to 4 | 752,568 | 6.0 | 5.7 | 638,115 | 6.9 | 6.3 | +114,453 |
| 5 to 9 | 814,708 | 6.5 | 6.2 | 683,807 | 7.4 | 6.8 | +130,901 |
| 10 to 14 | 816,595 | 6.5 | 6.2 | 686,002 | 7.4 | 6.9 | +130,593 |
| 15 to 19 | 749,326 | 6.0 | 6.0 | 677,321 | 7.3 | 7.4 | +72,005 |
| 20 to 24 | 806,826 | 6.4 | 6.9 | 628,573 | 6.8 | 6.9 | +178,253 |
| 25 to 29 | 886,838 | 7.1 | 7.2 | 653,600 | 7.1 | 7.0 | +233,238 |
| 30 to 34 | 904,394 | 7.2 | 7.0 | 687,333 | 7.4 | 7.4 | +217,061 |
| 35 to 39 | 901,698 | 7.2 | 7.0 | 703,051 | 7.6 | 7.6 | +198,647 |
| 40 to 44 | 814,409 | 6.5 | 6.3 | 705,495 | 7.6 | 7.7 | +108,914 |
| 45 to 49 | 802,519 | 6.4 | 6.3 | 651,768 | 7.0 | 7.1 | +150,751 |
| 50 to 54 | 787,162 | 6.3 | 6.4 | 624,154 | 6.7 | 6.9 | +163,008 |
| 55 to 59 | 754,238 | 6.0 | 6.1 | 490,058 | 5.3 | 5.3 | +264,180 |
| 60 to 64 | 711,157 | 5.7 | 5.8 | 394,572 | 4.3 | 4.1 | +316,585 |
| 65 to 69 | 625,896 | 5.0 | 5.0 | 322,863 | 3.5 | 3.5 | +303,033 |
| 70 to 74 | 561,279 | 4.5 | 4.6 | 292,618 | 3.2 | 3.5 | +268,661 |
| 75 to 79 | 392,644 | 3.1 | 3.2 | 220,027 | 2.4 | 2.8 | +172,617 |
| 80 to 84 | 252,476 | 2.0 | 2.1 | 125,330 | 1.4 | 1.7 | +127,146 |
| 85 and over | 210,443 | 1.7 | 2.0 | 81,849 | 0.9 | 1.1 | +128,594 |
| Total population | 12,545,176 | 100.0 | 100.0 | 9,266,536 | 100.0 | 100.0 | +3,278,640 |
Dominant groups
Analysis of the male five year age groups of Australia in 2021 compared to Greater Adelaide shows that there was a higher proportion of males in the younger age groups (under 15) and a lower proportion of males in the older age groups (65+).
Overall, 19.0% of the male population was aged between 0 and 15, and 16.3% were aged 65 years and over, compared with 18.1% and 17.0% respectively for Greater Adelaide.
There were no major differences between Australia and Greater Adelaide in 2021.
Emerging groups
From 2001 to 2021, Australia's male population increased by 3,278,640 people (35.4%). This represents an average annual population change of 1.53% per year over the period.
The largest changes in male age structure in this area between 2001 and 2021 were in the age groups:
- 60 to 64 (+316,585 males)
- 65 to 69 (+303,033 males)
- 70 to 74 (+268,661 males)
- 55 to 59 (+264,180 males)
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