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LEARN MORE ABOUT .idIn 2021, the largest age group in the City of Onkaparinga was 35 to 39 year olds. The group that changed the most since 2006 was 70 to 74 year olds, increasing by 3,060 people.
The Age Structure of the City of Onkaparinga provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of the City of Onkaparinga'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 the City of Onkaparinga'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 | |||||||
|---|---|---|---|---|---|---|---|
| City of Onkaparinga - Total females (Usual residence) | 2021 | 2006 | Change | ||||
| Five year age groups (years) | Number | % | Christies Beach % | Number | % | Christies Beach % | 2006 to 2021 |
| 0 to 4 | 4,590 | 5.1 | 6.3 | 4,444 | 5.8 | 4.4 | +146 |
| 5 to 9 | 5,259 | 5.9 | 4.8 | 4,947 | 6.5 | 4.4 | +312 |
| 10 to 14 | 5,188 | 5.8 | 4.8 | 5,369 | 7.1 | 6.4 | -181 |
| 15 to 19 | 4,967 | 5.6 | 4.9 | 5,275 | 6.9 | 5.7 | -308 |
| 20 to 24 | 4,801 | 5.4 | 6.5 | 4,780 | 6.3 | 6.1 | +21 |
| 25 to 29 | 5,244 | 5.9 | 7.7 | 4,357 | 5.7 | 4.9 | +887 |
| 30 to 34 | 5,576 | 6.2 | 8.3 | 4,897 | 6.4 | 5.9 | +679 |
| 35 to 39 | 6,039 | 6.8 | 6.4 | 5,399 | 7.1 | 6.0 | +640 |
| 40 to 44 | 5,655 | 6.3 | 5.7 | 5,774 | 7.6 | 6.0 | -119 |
| 45 to 49 | 5,585 | 6.2 | 5.7 | 5,994 | 7.9 | 6.1 | -409 |
| 50 to 54 | 5,971 | 6.7 | 6.5 | 5,664 | 7.5 | 5.3 | +307 |
| 55 to 59 | 5,849 | 6.5 | 6.1 | 5,485 | 7.2 | 6.7 | +364 |
| 60 to 64 | 5,894 | 6.6 | 5.7 | 3,758 | 4.9 | 5.6 | +2,136 |
| 65 to 69 | 5,514 | 6.2 | 5.0 | 2,717 | 3.6 | 7.0 | +2,797 |
| 70 to 74 | 5,235 | 5.9 | 5.5 | 2,175 | 2.9 | 6.4 | +3,060 |
| 75 to 79 | 3,491 | 3.9 | 3.4 | 2,036 | 2.7 | 5.5 | +1,455 |
| 80 to 84 | 2,195 | 2.5 | 2.9 | 1,605 | 2.1 | 4.1 | +590 |
| 85 and over | 2,349 | 2.6 | 3.7 | 1,343 | 1.8 | 3.6 | +1,006 |
| Total population | 89,402 | 100.0 | 100.0 | 76,019 | 100.0 | 100.0 | +13,383 |
Dominant groups
Analysis of the female five year age groups of the City of Onkaparinga in 2021 compared to Christies Beach shows that there was a higher proportion of females in the younger age groups (under 15) and a similar proportion of females in the older age groups (65+).
Overall, 16.8% of the female population was aged between 0 and 15, and 21.0% were aged 65 years and over, compared with 16.0% and 20.6% respectively for Christies Beach.
The major differences between the female age structure of the City of Onkaparinga and Christies Beach were:
- A smaller percentage of females aged 30 to 34 (6.2% compared to 8.3%)
- A smaller percentage of females aged 25 to 29 (5.9% compared to 7.7%)
- A smaller percentage of females aged 0 to 4 (5.1% compared to 6.3%)
- A smaller percentage of females aged 20 to 24 (5.4% compared to 6.5%)
Emerging groups
From 2006 to 2021, City of Onkaparinga's female population increased by 13,383 people (17.6%). This represents an average annual population change of 1.09% per year over the period.
The largest changes in female age structure in this area between 2006 and 2021 were in the age groups:
- 70 to 74 (+3,060 females)
- 65 to 69 (+2,797 females)
- 60 to 64 (+2,136 females)
- 75 to 79 (+1,455 females)
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