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City of OnkaparingaCommunity profile

City of Onkaparinga

Service age groups

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In 2021, the City of Onkaparinga had higher proportion of female children (under 18) and a lower proportion of females aged 60 or older than O'Sullivan Beach - Lonsdale.

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?'

Age structure - Service age groups
City of Onkaparinga - Total females (Usual residence)20212001Change
Service age group (years)Number%O'Sullivan Beach - Lonsdale %Number%O'Sullivan Beach - Lonsdale %2001 to 2021
Babies and pre-schoolers (0 to 4)4,5905.15.04,7476.46.2-157
Primary schoolers (5 to 11)7,3708.27.37,67310.38.4-303
Secondary schoolers (12 to 17)6,0866.86.16,7969.18.0-710
Tertiary education and independence (18 to 24)6,7677.66.26,5818.97.0+186
Young workforce (25 to 34)10,82212.113.89,89013.313.8+932
Parents and homebuilders (35 to 49)17,28319.317.017,89424.120.3-611
Older workers and pre-retirees (50 to 59)11,82013.211.59,54712.816.9+2,273
Empty nesters and retirees (60 to 69)11,40812.813.94,9926.79.5+6,416
Seniors (70 to 84)10,92512.217.55,2977.18.7+5,628
Elderly aged (85 and over)2,3492.61.89251.21.1+1,424
Total89,420100.0100.074,342100.0100.0+15,078
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 female service age groups of the City of Onkaparinga in 2021 compared to O'Sullivan Beach - Lonsdale shows that there was a higher proportion of females in the younger age groups (0 to 17 years) and a lower proportion of females in the older age groups (60+ years).

Overall, 20.2% of the female population was aged between 0 and 17, and 27.6% were aged 60 years and over, compared with 18.3% and 33.1% respectively for O'Sullivan Beach - Lonsdale.

The major differences between the female age structure of the City of Onkaparinga and O'Sullivan Beach - Lonsdale were:

  • A larger percentage of 'Parents and homebuilders' (19.3% compared to 17.0%)
  • A larger percentage of 'Older workers & pre-retirees' (13.2% compared to 11.5%)
  • A smaller percentage of 'Seniors' (12.2% compared to 17.5%)
  • A smaller percentage of 'Young workforce' (12.1% compared to 13.8%)

Emerging groups

From 2001 to 2021, City of Onkaparinga's female population increased by 15,078 people (20.3%). This represents an average annual population change of 0.93% per year over the period.

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

  • Empty nesters and retirees (60 to 69) (+6,416 females)
  • Seniors (70 to 84) (+5,628 females)
  • Older workers and pre-retirees (50 to 59) (+2,273 females)
  • Elderly aged (85 and over) (+1,424 females)

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