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City of OnkaparingaCommunity profile

O'Sullivan Beach - Lonsdale

Service age groups

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

The Age Structure of O'Sullivan Beach - Lonsdale provides key insights into the level of demand for age based services and facilities such as child care. It is an indicator of O'Sullivan Beach - Lonsdale'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 O'Sullivan Beach - Lonsdale'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
O'Sullivan Beach - Lonsdale - Total persons (Enumerated)20212011Change
Service age group (years)Number%City of Onkaparinga %Number%City of Onkaparinga %2011 to 2021
Babies and pre-schoolers (0 to 4)814.45.41477.76.7-66
Primary schoolers (5 to 11)1347.38.81608.49.0-26
Secondary schoolers (12 to 17)1196.57.41427.48.3-23
Tertiary education and independence (18 to 24)1156.28.01779.29.0-62
Young workforce (25 to 34)24613.312.226413.812.6-18
Parents and homebuilders (35 to 49)33818.319.337119.420.9-33
Older workers and pre-retirees (50 to 59)24413.213.023012.013.5+14
Empty nesters and retirees (60 to 69)24513.312.125713.410.8-12
Seniors (70 to 84)28915.711.71588.37.3+131
Elderly aged (85 and over)331.82.290.51.8+24
Total1,844100.0100.01,915100.0100.0-71
Source: Australian Bureau of Statistics, Census of Population and Housing 2011 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 O'Sullivan Beach - Lonsdale in 2021 compared to the City of Onkaparinga 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, 18.1% of the population was aged between 0 and 17, and 30.7% 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 O'Sullivan Beach - Lonsdale and the City of Onkaparinga were:

  • A larger percentage of 'Seniors' (15.7% compared to 11.7%)
  • A larger percentage of 'Empty nesters and retirees' (13.3% compared to 12.1%)
  • A smaller percentage of 'Tertiary education & independence' (6.2% compared to 8.0%)
  • A smaller percentage of 'Primary schoolers' (7.3% compared to 8.8%)

Emerging groups

From 2011 to 2021, O'Sullivan Beach - Lonsdale's population decreased by 71 people (3.7%). This represents an average annual population change of -0.38% per year over the period.

The largest changes in the age structure in this area between 2011 and 2021 were in the age groups:

  • Seniors (70 to 84) (+131 people)
  • Babies and pre-schoolers (0 to 4) (-66 people)
  • Tertiary education and independence (18 to 24) (-62 people)

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