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City of OnkaparingaCommunity profile

Central South District

Five year age groups

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In 2021, the largest age group in the Central South District was 35 to 39 year olds. The group that changed the most since 2001 was 25 to 29 year olds, increasing by 884 people.

The Age Structure of the Central South District 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 Central South District'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 Central South District'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
Central South District - Total persons (Usual residence)20212001Change
Five year age groups (years)Number%City of Onkaparinga %Number%City of Onkaparinga %2001 to 2021
0 to 41,6356.35.49376.46.6+698
5 to 91,8187.06.21,0717.37.6+747
10 to 141,7526.86.21,1187.67.8+634
15 to 191,4985.85.81,1698.07.9+329
20 to 241,4825.75.68996.16.2+583
25 to 291,7866.96.09026.26.2+884
30 to 341,8217.06.31,0487.17.0+773
35 to 391,9577.66.71,1237.77.5+834
40 to 441,6306.36.11,1738.08.1+457
45 to 491,6706.46.41,0927.47.9+578
50 to 541,6066.26.61,0907.47.7+516
55 to 591,5365.96.57224.95.2+814
60 to 641,4315.56.35884.03.7+843
65 to 691,3325.15.95123.53.0+820
70 to 741,1714.55.75433.72.9+628
75 to 797903.13.83942.72.3+396
80 to 845011.92.31971.31.4+304
85 and over4761.82.2870.61.0+389
Total population25,892100.0100.014,667100.0100.0+11,225
Source: Australian Bureau of Statistics, Census of Population and Housing 2001 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 Central South District in 2021 compared to the City of Onkaparinga shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).

Overall, 20.1% of the population was aged between 0 and 15, and 16.5% were aged 65 years and over, compared with 17.7% and 19.9% respectively for the City of Onkaparinga.

The major differences between the age structure of the Central South District and the City of Onkaparinga were:

  • A larger percentage of persons aged 0 to 4 (6.3% compared to 5.4%)
  • A larger percentage of persons aged 25 to 29 (6.9% compared to 6.0%)
  • A larger percentage of persons aged 5 to 9 (7.0% compared to 6.2%)
  • A smaller percentage of persons aged 70 to 74 (4.5% compared to 5.7%)

Emerging groups

From 2001 to 2021, Central South District's population increased by 11,225 people (76.5%). This represents an average annual population change of 2.88% per year over the period.

The largest changes in age structure in this area between 2001 and 2021 were in the age groups:

  • 25 to 29 (+884 persons)
  • 60 to 64 (+843 persons)
  • 35 to 39 (+834 persons)
  • 65 to 69 (+820 persons)

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