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City of OnkaparingaCommunity profile

Aldinga - Port Willunga

Service age groups

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

The Age Structure of Aldinga - Port Willunga provides key insights into the level of demand for age based services and facilities such as child care. It is an indicator of Aldinga - Port Willunga'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 Aldinga - Port Willunga'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 - Service age groups
Aldinga - Port Willunga - Total persons (Enumerated)20211991Change
Service age group (years)Number%City of Onkaparinga %Number%City of Onkaparinga %1991 to 2021
Babies and pre-schoolers (0 to 4)1215.05.41469.58.4-25
Primary schoolers (5 to 11)2349.68.820513.312.9+29
Secondary schoolers (12 to 17)1797.37.417211.210.4+7
Tertiary education and independence (18 to 24)1666.88.01066.99.7+59
Young workforce (25 to 34)2229.112.227818.116.5-56
Parents and homebuilders (35 to 49)45418.619.333421.724.5+119
Older workers and pre-retirees (50 to 59)37615.413.01006.57.2+275
Empty nesters and retirees (60 to 69)37315.312.11238.05.8+250
Seniors (70 to 84)28111.511.7644.24.3+217
Elderly aged (85 and over)341.42.270.50.3+27
Total2,440100.0100.01,538100.0100.0+901
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

Dominant groups

Analysis of the service age groups of Aldinga - Port Willunga in 2021 compared to the City of Onkaparinga shows that there was a similar 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, 21.9% of the population was aged between 0 and 17, and 28.2% were aged 60 years and over, compared with 21.6% and 26.0% respectively for the City of Onkaparinga.

The major differences between the age structure of Aldinga - Port Willunga and the City of Onkaparinga were:

  • A larger percentage of 'Empty nesters and retirees' (15.3% compared to 12.1%)
  • A larger percentage of 'Older workers & pre-retirees' (15.4% compared to 13.0%)
  • A smaller percentage of 'Young workforce' (9.1% compared to 12.2%)
  • A smaller percentage of 'Tertiary education & independence' (6.8% compared to 8.0%)

Emerging groups

From 1991 to 2021, Aldinga - Port Willunga's population increased by 902 people (58.6%). This represents an average annual population change of 1.55% per year over the period.

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

  • Older workers and pre-retirees (50 to 59) (+275 people)
  • Empty nesters and retirees (60 to 69) (+250 people)
  • Seniors (70 to 84) (+217 people)
  • Parents and homebuilders (35 to 49) (+119 people)

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