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City of OnkaparingaCommunity profile

Northern District

Five year age groups

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In 2021, the largest age group in the Northern District was 60 to 64 year olds. The group that changed the most since 2006 was 70 to 74 year olds, increasing by 1,514 people.

The Age Structure of the Northern District provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of the Northern District'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 the Northern District'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
Northern District - Total persons (Usual residence)20212006Change
Five year age groups (years)Number%City of Onkaparinga %Number%City of Onkaparinga %2006 to 2021
0 to 42,1135.25.42,3945.96.1-281
5 to 92,4305.96.22,7176.76.8-288
10 to 142,5446.26.22,9397.37.3-395
15 to 192,4686.05.83,2208.07.3-753
20 to 242,1775.35.62,6766.66.5-500
25 to 292,1055.16.02,2695.65.8-164
30 to 342,4546.06.32,5606.36.5-107
35 to 392,7326.76.72,7386.87.0-6
40 to 442,7146.66.13,0587.67.4-345
45 to 492,6306.46.43,4788.67.7-849
50 to 542,6736.56.63,3038.27.3-631
55 to 592,6596.56.53,0797.67.1-421
60 to 642,7876.86.31,9104.75.0+876
65 to 692,5836.35.91,2253.03.6+1,358
70 to 742,4806.15.79652.42.8+1,514
75 to 791,5223.73.88502.12.5+672
80 to 848852.22.36051.51.8+280
85 and over9642.42.24721.21.4+491
Total population40,920100.0100.040,467100.0100.0+453
Source: Australian Bureau of Statistics, Census of Population and Housing 2006 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 the Northern District 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, 17.3% of the population was aged between 0 and 15, and 20.6% were aged 65 years and over, compared with 17.7% and 19.9% respectively for the City of Onkaparinga.

The major difference between the age structure of the Northern District and the City of Onkaparinga is:

  • A smaller percentage of persons aged 25 to 29 (5.1% compared to 6.0%)

Emerging groups

From 2006 to 2021, Northern District's population increased by 453 people (1.1%). This represents an average annual population change of 0.07% per year over the period.

The largest changes in age structure in this area between 2006 and 2021 were in the age groups:

  • 70 to 74 (+1,514 persons)
  • 65 to 69 (+1,358 persons)
  • 60 to 64 (+876 persons)
  • 45 to 49 (-849 persons)

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