Powered by .id (informed decisions) for Perth South West Metropolitan Alliance
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LEARN MORE ABOUT .idIn 2021, the largest age group in Perth South West was 35 to 39 year olds. The group that changed the most since 1991 was 50 to 54 year olds, increasing by 16,907 people.
The Age Structure of Perth South West provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Perth South West'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 Perth South West'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 | |||||||
|---|---|---|---|---|---|---|---|
| Perth South West - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | City of Cockburn % | Number | % | City of Cockburn % | 1991 to 2021 |
| 0 to 4 | 27,778 | 6.4 | 6.8 | 17,176 | 7.7 | 9.1 | +10,602 |
| 5 to 9 | 29,213 | 6.8 | 6.7 | 17,131 | 7.6 | 8.6 | +12,081 |
| 10 to 14 | 29,457 | 6.8 | 6.4 | 17,135 | 7.6 | 8.2 | +12,322 |
| 15 to 19 | 26,316 | 6.1 | 5.6 | 17,769 | 7.9 | 8.2 | +8,546 |
| 20 to 24 | 26,362 | 6.1 | 6.4 | 17,532 | 7.8 | 8.1 | +8,830 |
| 25 to 29 | 27,415 | 6.3 | 6.9 | 16,969 | 7.6 | 8.9 | +10,445 |
| 30 to 34 | 30,699 | 7.1 | 8.1 | 18,145 | 8.1 | 9.1 | +12,554 |
| 35 to 39 | 32,103 | 7.4 | 8.2 | 17,604 | 7.9 | 7.9 | +14,499 |
| 40 to 44 | 29,221 | 6.8 | 7.3 | 17,200 | 7.7 | 7.3 | +12,021 |
| 45 to 49 | 28,561 | 6.6 | 6.8 | 13,299 | 5.9 | 5.5 | +15,262 |
| 50 to 54 | 27,994 | 6.5 | 6.4 | 11,087 | 4.9 | 4.8 | +16,907 |
| 55 to 59 | 25,850 | 6.0 | 5.7 | 9,736 | 4.3 | 4.2 | +16,113 |
| 60 to 64 | 23,256 | 5.4 | 5.1 | 9,670 | 4.3 | 3.4 | +13,585 |
| 65 to 69 | 20,410 | 4.7 | 4.3 | 8,410 | 3.8 | 2.6 | +12,000 |
| 70 to 74 | 17,604 | 4.1 | 3.6 | 6,179 | 2.8 | 1.7 | +11,425 |
| 75 to 79 | 12,407 | 2.9 | 2.4 | 4,808 | 2.1 | 1.2 | +7,599 |
| 80 to 84 | 8,695 | 2.0 | 1.7 | 2,776 | 1.2 | 0.6 | +5,918 |
| 85 and over | 8,811 | 2.0 | 1.6 | 1,551 | 0.7 | 0.5 | +7,259 |
| Total population | 432,152 | 100.0 | 100.0 | 224,184 | 100.0 | 100.0 | +207,967 |
Dominant groups
Analysis of the five year age groups of Perth South West in 2021 compared to the City of Cockburn shows that there was a similar proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 20.0% of the population was aged between 0 and 15, and 15.7% were aged 65 years and over, compared with 19.9% and 13.6% respectively for the City of Cockburn.
The major differences between the age structure of Perth South West and the City of Cockburn were:
- A larger percentage of persons aged 75 to 79 (2.9% compared to 2.4%)
- A smaller percentage of persons aged 30 to 34 (7.1% compared to 8.1%)
- A smaller percentage of persons aged 35 to 39 (7.4% compared to 8.2%)
- A smaller percentage of persons aged 25 to 29 (6.3% compared to 6.9%)
Emerging groups
From 1991 to 2021, Perth South West's population increased by 207,968 people (92.8%). This represents an average annual population change of 2.21% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 50 to 54 (+16,907 persons)
- 55 to 59 (+16,113 persons)
- 45 to 49 (+15,262 persons)
- 35 to 39 (+14,499 persons)
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