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LEARN MORE ABOUT .idIn 2021, the largest age group in St Clair was 60 to 64 year olds. The group that changed the most since 1991 was 30 to 34 year olds, decreasing by 790 people.
The Age Structure of St Clair provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of St Clair'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 St Clair'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 | |||||||
|---|---|---|---|---|---|---|---|
| St Clair - Total females (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Orchard Hills % | Number | % | Orchard Hills % | 1991 to 2021 |
| 0 to 4 | 652 | 6.6 | 3.4 | 1,348 | 12.8 | 6.8 | -696 |
| 5 to 9 | 685 | 6.9 | 4.2 | 1,420 | 13.4 | 7.2 | -735 |
| 10 to 14 | 702 | 7.1 | 6.5 | 987 | 9.3 | 8.4 | -285 |
| 15 to 19 | 603 | 6.1 | 5.7 | 688 | 6.5 | 10.0 | -85 |
| 20 to 24 | 582 | 5.9 | 6.9 | 599 | 5.7 | 11.2 | -17 |
| 25 to 29 | 682 | 6.9 | 5.1 | 1,034 | 9.8 | 8.3 | -352 |
| 30 to 34 | 752 | 7.6 | 4.2 | 1,542 | 14.6 | 6.5 | -790 |
| 35 to 39 | 720 | 7.3 | 4.9 | 1,105 | 10.5 | 5.3 | -385 |
| 40 to 44 | 670 | 6.7 | 4.3 | 746 | 7.1 | 9.7 | -76 |
| 45 to 49 | 620 | 6.2 | 5.3 | 359 | 3.4 | 8.9 | +261 |
| 50 to 54 | 569 | 5.7 | 10.4 | 195 | 1.8 | 3.8 | +374 |
| 55 to 59 | 638 | 6.4 | 9.8 | 142 | 1.3 | 4.6 | +496 |
| 60 to 64 | 808 | 8.1 | 6.9 | 134 | 1.3 | 4.2 | +674 |
| 65 to 69 | 531 | 5.3 | 4.9 | 109 | 1.0 | 3.3 | +422 |
| 70 to 74 | 346 | 3.5 | 6.0 | 68 | 0.6 | 1.0 | +278 |
| 75 to 79 | 185 | 1.9 | 5.9 | 46 | 0.4 | 0.2 | +139 |
| 80 to 84 | 91 | 0.9 | 2.4 | 30 | 0.3 | -- | +61 |
| 85 and over | 94 | 0.9 | 3.1 | 6 | 0.1 | 0.4 | +88 |
| Total population | 9,930 | 100.0 | 100.0 | 10,558 | 100.0 | 100.0 | -628 |
Dominant groups
Analysis of the female five year age groups of St Clair in 2021 compared to Orchard Hills 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, 20.5% of the female population was aged between 0 and 15, and 12.6% were aged 65 years and over, compared with 14.0% and 22.3% respectively for Orchard Hills.
The major differences between the female age structure of St Clair and Orchard Hills were:
- A larger percentage of females aged 30 to 34 (7.6% compared to 4.2%)
- A smaller percentage of females aged 50 to 54 (5.7% compared to 10.4%)
- A smaller percentage of females aged 75 to 79 (1.9% compared to 5.9%)
- A smaller percentage of females aged 55 to 59 (6.4% compared to 9.8%)
Emerging groups
From 1991 to 2021, St Clair's female population decreased by 628 people (5.9%). This represents an average annual population change of -0.2% per year over the period.
The largest changes in female age structure in this area between 1991 and 2021 were in the age groups:
- 30 to 34 (-790 females)
- 5 to 9 (-735 females)
- 0 to 4 (-696 females)
- 60 to 64 (+674 females)
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