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City of OnkaparingaCommunity profile

City of Onkaparinga

Five year age groups

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In 2021, the largest age group in the City of Onkaparinga was 35 to 39 year olds. The group that changed the most since 2016 was 70 to 74 year olds, increasing by 2,742 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 persons (Usual residence)20212016Change
Five year age groups (years)Number%Greater Adelaide %Number%Greater Adelaide %2016 to 2021
0 to 49,4005.45.410,2926.25.9-892
5 to 910,8006.25.910,7466.46.0+54
10 to 1410,8506.25.910,1556.15.6+695
15 to 1910,2185.85.610,4136.26.1-195
20 to 249,8815.66.610,0416.06.9-160
25 to 2910,4346.07.09,8075.96.8+627
30 to 3411,0136.37.010,8876.57.0+126
35 to 3911,7796.77.010,5016.36.4+1,278
40 to 4410,7656.16.310,9286.66.5-163
45 to 4911,1316.46.211,4326.96.8-301
50 to 5411,6106.66.411,1466.76.6+464
55 to 5911,3076.56.211,0496.66.4+258
60 to 6411,0936.35.910,4766.35.7+617
65 to 6910,4135.95.310,2106.15.3+203
70 to 749,9155.74.97,1734.34.0+2,742
75 to 796,6683.83.54,7272.83.0+1,941
80 to 844,0362.32.43,3222.02.3+714
85 and over3,8872.22.63,4642.12.6+423
Total population175,200100.0100.0166,769100.0100.0+8,431
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 and 2021. Compiled and presented by .id (informed decisions).
Please refer to specific data notes for more information

Dominant groups

Analysis of the five year age groups of the City of Onkaparinga in 2021 compared to Greater Adelaide shows that there was a higher proportion of people in the younger age groups (under 15) as well as a higher proportion of people in the older age groups (65+).

Overall, 17.7% of the population was aged between 0 and 15, and 19.9% 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 the City of Onkaparinga and Greater Adelaide were:

  • A larger percentage of persons aged 70 to 74 (5.7% compared to 4.9%)
  • A smaller percentage of persons aged 25 to 29 (6.0% compared to 7.0%)
  • A smaller percentage of persons aged 20 to 24 (5.6% compared to 6.6%)
  • A smaller percentage of persons aged 30 to 34 (6.3% compared to 7.0%)

Emerging groups

From 2016 to 2021, City of Onkaparinga's population increased by 8,431 people (5.1%). This represents an average annual population change of 0.99% per year over the period.

The largest changes in age structure in this area between 2016 and 2021 were in the age groups:

  • 70 to 74 (+2,742 persons)
  • 75 to 79 (+1,941 persons)
  • 35 to 39 (+1,278 persons)
  • 0 to 4 (-892 persons)

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