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LEARN MORE ABOUT .idIn 2021, the largest age group in Onkaparinga Hills was 55 to 59 year olds. The group that changed the most since 2001 was 60 to 64 year olds, increasing by 143 people.
The Age Structure of Onkaparinga Hills provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Onkaparinga Hills'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 Onkaparinga Hills'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 | |||||||
|---|---|---|---|---|---|---|---|
| Onkaparinga Hills - Total persons (Usual residence) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | Greater Adelaide % | Number | % | Greater Adelaide % | 2001 to 2021 |
| 0 to 4 | 102 | 3.9 | 5.4 | 162 | 5.9 | 6.0 | -61 |
| 5 to 9 | 138 | 5.3 | 5.9 | 249 | 9.0 | 6.5 | -112 |
| 10 to 14 | 187 | 7.2 | 5.9 | 292 | 10.5 | 6.5 | -106 |
| 15 to 19 | 198 | 7.6 | 5.6 | 257 | 9.2 | 7.0 | -59 |
| 20 to 24 | 146 | 5.6 | 6.6 | 143 | 5.2 | 6.6 | +2 |
| 25 to 29 | 121 | 4.6 | 7.0 | 116 | 4.2 | 6.7 | +5 |
| 30 to 34 | 118 | 4.5 | 7.0 | 222 | 8.0 | 7.2 | -105 |
| 35 to 39 | 140 | 5.4 | 7.0 | 247 | 8.9 | 7.5 | -108 |
| 40 to 44 | 138 | 5.3 | 6.3 | 271 | 9.7 | 7.7 | -133 |
| 45 to 49 | 186 | 7.1 | 6.2 | 254 | 9.1 | 7.2 | -68 |
| 50 to 54 | 227 | 8.7 | 6.4 | 212 | 7.6 | 7.0 | +14 |
| 55 to 59 | 229 | 8.8 | 6.2 | 153 | 5.5 | 5.3 | +75 |
| 60 to 64 | 218 | 8.4 | 5.9 | 74 | 2.7 | 4.3 | +143 |
| 65 to 69 | 169 | 6.5 | 5.3 | 51 | 1.8 | 3.7 | +118 |
| 70 to 74 | 142 | 5.4 | 4.9 | 37 | 1.4 | 3.8 | +104 |
| 75 to 79 | 96 | 3.7 | 3.5 | 19 | 0.7 | 3.3 | +77 |
| 80 to 84 | 45 | 1.7 | 2.4 | 12 | 0.5 | 2.1 | +32 |
| 85 and over | 9 | 0.3 | 2.6 | 3 | 0.1 | 1.7 | +6 |
| Total population | 2,609 | 100.0 | 100.0 | 2,783 | 100.0 | 100.0 | -175 |
Dominant groups
Analysis of the five year age groups of Onkaparinga Hills in 2021 compared to Greater Adelaide shows that there was a lower proportion of people in the younger age groups (under 15) as well as a lower proportion of people in the older age groups (65+).
Overall, 16.4% of the population was aged between 0 and 15, and 17.7% were aged 65 years and over, compared with 17.1% and 18.6% respectively for Greater Adelaide.
The major differences between the age structure of Onkaparinga Hills and Greater Adelaide were:
- A larger percentage of persons aged 55 to 59 (8.8% compared to 6.2%)
- A larger percentage of persons aged 60 to 64 (8.4% compared to 5.9%)
- A smaller percentage of persons aged 30 to 34 (4.5% compared to 7.0%)
- A smaller percentage of persons aged 25 to 29 (4.6% compared to 7.0%)
Emerging groups
From 2001 to 2021, Onkaparinga Hills's population decreased by 174 people (6.3%). This represents an average annual population change of -0.32% per year over the period.
The largest changes in age structure in this area between 2001 and 2021 were in the age groups:
- 60 to 64 (+143 persons)
- 40 to 44 (-133 persons)
- 65 to 69 (+118 persons)
- 5 to 9 (-112 persons)
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