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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 1991 was 55 to 59 year olds, increasing by 439,116 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) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Queensland % | Number | % | Queensland % | 1991 to 2021 |
| 0 to 4 | 711,265 | 5.5 | 5.4 | 613,958 | 7.2 | 7.2 | +97,307 |
| 5 to 9 | 771,428 | 6.0 | 6.1 | 612,456 | 7.2 | 7.4 | +158,972 |
| 10 to 14 | 771,461 | 6.0 | 6.3 | 605,354 | 7.1 | 7.3 | +166,107 |
| 15 to 19 | 708,481 | 5.5 | 5.8 | 643,714 | 7.6 | 7.9 | +64,767 |
| 20 to 24 | 772,713 | 6.0 | 6.1 | 666,837 | 7.9 | 7.8 | +105,876 |
| 25 to 29 | 884,842 | 6.9 | 6.7 | 670,853 | 7.9 | 7.7 | +213,989 |
| 30 to 34 | 948,697 | 7.4 | 6.9 | 698,625 | 8.2 | 8.0 | +250,072 |
| 35 to 39 | 937,120 | 7.3 | 7.0 | 651,733 | 7.7 | 7.5 | +285,387 |
| 40 to 44 | 834,430 | 6.5 | 6.4 | 628,414 | 7.4 | 7.4 | +206,016 |
| 45 to 49 | 833,440 | 6.5 | 6.6 | 491,302 | 5.8 | 5.9 | +342,138 |
| 50 to 54 | 823,776 | 6.4 | 6.5 | 402,988 | 4.7 | 4.7 | +420,788 |
| 55 to 59 | 787,669 | 6.1 | 6.2 | 348,553 | 4.1 | 4.1 | +439,116 |
| 60 to 64 | 756,947 | 5.9 | 5.9 | 359,857 | 4.2 | 4.3 | +397,090 |
| 65 to 69 | 672,553 | 5.2 | 5.3 | 341,855 | 4.0 | 4.1 | +330,698 |
| 70 to 74 | 599,494 | 4.7 | 4.8 | 277,200 | 3.3 | 3.4 | +322,294 |
| 75 to 79 | 429,279 | 3.3 | 3.4 | 221,053 | 2.6 | 2.6 | +208,226 |
| 80 to 84 | 302,140 | 2.3 | 2.2 | 142,547 | 1.7 | 1.6 | +159,593 |
| 85 and over | 331,899 | 2.6 | 2.3 | 108,100 | 1.3 | 1.2 | +223,799 |
| Total population | 12,877,634 | 100.0 | 100.0 | 8,485,399 | 100.0 | 100.0 | +4,392,235 |
Dominant groups
Analysis of the female five year age groups of Australia in 2021 compared to Queensland shows that there was a similar proportion of females in the younger age groups (under 15) as well as a similar 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 17.8% and 18.0% respectively for Queensland.
There were no major differences between Australia and Queensland in 2021.
Emerging groups
From 1991 to 2021, Australia's female population increased by 4,392,235 people (51.8%). This represents an average annual population change of 1.4% per year over the period.
The largest changes in female age structure in this area between 1991 and 2021 were in the age groups:
- 55 to 59 (+439,116 females)
- 50 to 54 (+420,788 females)
- 60 to 64 (+397,090 females)
- 45 to 49 (+342,138 females)
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