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City of OnkaparingaCommunity profile

Aldinga - Port Willunga

Five year age groups

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In 2021, the largest age group in Aldinga - Port Willunga was 65 to 69 year olds. The group that changed the most since 2001 was 65 to 69 year olds, increasing by 139 people.

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 also an indicator of Aldinga - Port Willunga's residential role and function and how it is likely to change in the future.

Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.

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 - Five year age groups
Aldinga - Port Willunga - Total persons (Usual residence)20212001Change
Five year age groups (years)Number%City of Onkaparinga %Number%City of Onkaparinga %2001 to 2021
0 to 41194.75.41647.96.6-45
5 to 91726.86.21889.17.6-17
10 to 141666.56.21527.37.8+13
15 to 191305.15.81446.97.9-14
20 to 241375.45.61105.36.2+26
25 to 291114.46.01457.06.2-34
30 to 341124.46.31477.17.0-36
35 to 391475.86.71617.87.5-15
40 to 441495.86.11617.88.1-13
45 to 491797.06.41738.47.9+5
50 to 542038.06.61386.77.7+64
55 to 591907.56.5904.45.2+99
60 to 641776.96.3592.93.7+117
65 to 692238.85.9834.03.0+139
70 to 741495.85.7874.22.9+62
75 to 791054.13.8341.72.3+70
80 to 84441.72.3251.21.4+19
85 and over351.42.270.41.0+27
Total population2,548100.0100.02,079100.0100.0+469
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 five year 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 (under 15) and a higher proportion of people in the older age groups (65+).

Overall, 17.9% of the population was aged between 0 and 15, and 21.8% were aged 65 years and over, compared with 17.7% and 19.9% 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 persons aged 65 to 69 (8.8% compared to 5.9%)
  • A larger percentage of persons aged 50 to 54 (8.0% compared to 6.6%)
  • A smaller percentage of persons aged 30 to 34 (4.4% compared to 6.3%)
  • A smaller percentage of persons aged 25 to 29 (4.4% compared to 6.0%)

Emerging groups

From 2001 to 2021, Aldinga - Port Willunga's population increased by 469 people (22.6%). This represents an average annual population change of 1.02% per year over the period.

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

  • 65 to 69 (+139 persons)
  • 60 to 64 (+117 persons)
  • 55 to 59 (+99 persons)
  • 75 to 79 (+70 persons)

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