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LEARN MORE ABOUT .idIn 2021, the largest age group in Western Australia was 35 to 39 year olds. The group that changed the most since 2011 was 65 to 69 year olds, increasing by 25,496 people.
The Age Structure of Western 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 Western 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 Western 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 | |||||||
|---|---|---|---|---|---|---|---|
| Western Australia - Total females (Usual residence) | 2021 | 2011 | Change | ||||
| Five year age groups (years) | Number | % | Greater Hobart % | Number | % | Greater Hobart % | 2011 to 2021 |
| 0 to 4 | 78,503 | 5.9 | 4.9 | 73,425 | 6.6 | 6.1 | +5,078 |
| 5 to 9 | 84,042 | 6.3 | 5.5 | 69,730 | 6.3 | 5.7 | +14,312 |
| 10 to 14 | 83,238 | 6.2 | 5.6 | 71,136 | 6.4 | 6.0 | +12,102 |
| 15 to 19 | 74,580 | 5.6 | 5.1 | 71,715 | 6.4 | 6.2 | +2,865 |
| 20 to 24 | 77,702 | 5.8 | 5.8 | 76,759 | 6.9 | 6.6 | +943 |
| 25 to 29 | 87,980 | 6.6 | 7.8 | 81,137 | 7.3 | 6.3 | +6,843 |
| 30 to 34 | 100,399 | 7.5 | 7.9 | 76,958 | 6.9 | 5.9 | +23,441 |
| 35 to 39 | 101,372 | 7.6 | 6.9 | 80,166 | 7.2 | 6.6 | +21,206 |
| 40 to 44 | 89,399 | 6.7 | 5.9 | 83,058 | 7.5 | 6.9 | +6,341 |
| 45 to 49 | 87,572 | 6.5 | 6.0 | 79,418 | 7.1 | 6.9 | +8,154 |
| 50 to 54 | 86,940 | 6.5 | 6.1 | 75,026 | 6.7 | 7.4 | +11,914 |
| 55 to 59 | 81,965 | 6.1 | 6.1 | 67,305 | 6.0 | 6.7 | +14,660 |
| 60 to 64 | 76,868 | 5.7 | 6.3 | 59,776 | 5.4 | 6.0 | +17,092 |
| 65 to 69 | 68,326 | 5.1 | 5.8 | 42,830 | 3.8 | 4.6 | +25,496 |
| 70 to 74 | 58,785 | 4.4 | 5.1 | 34,003 | 3.1 | 3.7 | +24,782 |
| 75 to 79 | 40,201 | 3.0 | 3.7 | 26,740 | 2.4 | 3.0 | +13,461 |
| 80 to 84 | 28,842 | 2.2 | 2.7 | 21,565 | 1.9 | 2.6 | +7,277 |
| 85 and over | 30,459 | 2.3 | 2.8 | 22,237 | 2.0 | 2.8 | +8,222 |
| Total population | 1,337,173 | 100.0 | 100.0 | 1,112,984 | 100.0 | 100.0 | +224,189 |
Dominant groups
Analysis of the female five year age groups of Western Australia in 2021 compared to Greater Hobart shows that there was a higher proportion of females in the younger age groups (under 15) and a lower proportion of females in the older age groups (65+).
Overall, 18.4% of the female population was aged between 0 and 15, and 16.9% were aged 65 years and over, compared with 16.0% and 20.0% respectively for Greater Hobart.
The major differences between the female age structure of Western Australia and Greater Hobart were:
- A larger percentage of females aged 0 to 4 (5.9% compared to 4.9%)
- A larger percentage of females aged 5 to 9 (6.3% compared to 5.5%)
- A larger percentage of females aged 40 to 44 (6.7% compared to 5.9%)
- A smaller percentage of females aged 25 to 29 (6.6% compared to 7.8%)
Emerging groups
From 2011 to 2021, Western Australia's female population increased by 224,189 people (20.1%). This represents an average annual population change of 1.85% per year over the period.
The largest changes in female age structure in this area between 2011 and 2021 were in the age groups:
- 65 to 69 (+25,496 females)
- 70 to 74 (+24,782 females)
- 30 to 34 (+23,441 females)
- 35 to 39 (+21,206 females)
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