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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 higher proportion of children (under 18) and a similar proportion of persons aged 60 or older than Morphett Vale (West).

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)20211991Change
Service age group (years)Number%Morphett Vale (West) %Number%Morphett Vale (West) %1991 to 2021
Babies and pre-schoolers (0 to 4)9,3715.45.810,6298.47.1-1,259
Primary schoolers (5 to 11)15,1078.88.316,36012.913.2-1,253
Secondary schoolers (12 to 17)12,6897.46.313,21810.411.7-530
Tertiary education and independence (18 to 24)13,7228.08.012,3959.711.3+1,326
Young workforce (25 to 34)21,07012.215.221,06416.514.8+6
Parents and homebuilders (35 to 49)33,17119.319.131,24724.525.3+1,924
Older workers and pre-retirees (50 to 59)22,36513.011.99,1357.26.5+13,229
Empty nesters and retirees (60 to 69)20,84412.111.47,4025.85.4+13,441
Seniors (70 to 84)20,12311.712.65,4464.34.5+14,677
Elderly aged (85 and over)3,8552.21.63830.30.2+3,471
Total172,317100.0100.0127,283100.0100.0+45,033
Source: Australian Bureau of Statistics, Census of Population and Housing 1991 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, 1991 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 Morphett Vale (West) shows that there was a higher proportion of people in the younger age groups (0 to 17 years) and a similar 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 20.4% and 25.5% respectively for Morphett Vale (West).

The major differences between the age structure of the City of Onkaparinga and Morphett Vale (West) were:

  • A larger percentage of 'Older workers & pre-retirees' (13.0% compared to 11.9%)
  • A larger percentage of 'Secondary schoolers' (7.4% compared to 6.3%)
  • A smaller percentage of 'Young workforce' (12.2% compared to 15.2%)
  • A smaller percentage of 'Seniors' (11.7% compared to 12.6%)

Emerging groups

From 1991 to 2021, City of Onkaparinga's population increased by 45,034 people (35.4%). This represents an average annual population change of 1.01% per year over the period.

The largest changes in the age structure in this area between 1991 and 2021 were in the age groups:

  • Seniors (70 to 84) (+14,677 people)
  • Empty nesters and retirees (60 to 69) (+13,441 people)
  • Older workers and pre-retirees (50 to 59) (+13,229 people)
  • Elderly aged (85 and over) (+3,471 people)

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