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City of OnkaparingaCommunity profile
Service age groups Five year age groups Age-sex pyramid

City of Onkaparinga

Service age groups

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In 2021, the City of Onkaparinga had lower proportion of children (under 18) and a higher proportion of persons aged 60 or older than Aldinga Beach.

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 an indicator of the City of Onkaparinga's residential role and function and how it is likely to change in the future.

Service age groups divide the population into age categories that reflect typical life-stages. They indicate the level of demand for services that target people at different stages in life and how that demand is changing.

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?'

Refers to:

Total population

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Age structure - Service age groups
City of Onkaparinga - Total persons (Enumerated)20212001Change
Service age group (years)Number%Aldinga Beach %Number%Aldinga Beach %2001 to 2021
Babies and pre-schoolers (0 to 4)9,3715.45.99,6846.77.6-313
Primary schoolers (5 to 11)15,1078.810.615,62010.813.5-513
Secondary schoolers (12 to 17)12,6897.48.913,9849.79.3-1,295
Tertiary education and independence (18 to 24)13,7228.07.713,3929.37.3+330
Young workforce (25 to 34)21,07012.211.119,25113.313.0+1,819
Parents and homebuilders (35 to 49)33,17119.319.833,96023.522.7-789
Older workers and pre-retirees (50 to 59)22,36513.012.318,46612.89.9+3,899
Empty nesters and retirees (60 to 69)20,84412.110.79,4016.58.0+11,443
Seniors (70 to 84)20,12311.711.09,2526.47.4+10,871
Elderly aged (85 and over)3,8552.22.01,3781.01.3+2,477
Total172,317100.0100.0144,388100.0100.0+27,929
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
Source: Australian Bureau of Statistics, Census of Population and Housing, 2021 (Enumerated data). Compiled and presented in profile.id by .id (informed decisions).
Source: Australian Bureau of Statistics, Census of Population and Housing, 2001 and 2021 (Enumerated data). Compiled and presented in profile.id by .id (informed decisions).

Dominant groups

Analysis of the service age groups of the City of Onkaparinga in 2021 compared to Aldinga Beach shows that there was a lower proportion of people in the younger age groups (0 to 17 years) and a higher proportion of people in the older age groups (60+ years).

Overall, 21.6% of the population was aged between 0 and 17, and 26.0% were aged 60 years and over, compared with 25.4% and 23.7% respectively for Aldinga Beach.

The major differences between the age structure of the City of Onkaparinga and Aldinga Beach were:

  • A larger percentage of 'Empty nesters and retirees' (12.1% compared to 10.7%)
  • A larger percentage of 'Young workforce' (12.2% compared to 11.1%)
  • A smaller percentage of 'Primary schoolers' (8.8% compared to 10.6%)
  • A smaller percentage of 'Secondary schoolers' (7.4% compared to 8.9%)

Emerging groups

From 2001 to 2021, City of Onkaparinga's population increased by 27,929 people (19.3%). This represents an average annual population change of 0.89% per year over the period.

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

  • Empty nesters and retirees (60 to 69) (+11,443 people)
  • Seniors (70 to 84) (+10,871 people)
  • Older workers and pre-retirees (50 to 59) (+3,899 people)
  • Elderly aged (85 and over) (+2,477 people)

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