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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 1991 was 60 to 64 year olds, increasing by 1,994 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 (Enumerated)20211991Change
Five year age groups (years)Number%City of Onkaparinga %Number%City of Onkaparinga %1991 to 2021
0 to 42,1165.35.43,2448.98.4-1,128
5 to 92,4216.06.33,80710.59.2-1,387
10 to 142,5506.46.33,75310.38.9-1,203
15 to 192,4336.15.93,0488.48.2-616
20 to 242,1365.35.61,8455.16.7+291
25 to 292,0405.15.92,4076.67.6-368
30 to 342,4066.06.33,71410.29.0-1,308
35 to 392,6776.76.74,09011.39.3-1,413
40 to 442,6666.76.23,98011.09.3-1,314
45 to 492,5776.46.42,1475.95.9+430
50 to 542,6116.56.61,2223.44.1+1,389
55 to 592,5856.56.47702.13.1+1,815
60 to 642,7106.86.37162.03.0+1,994
65 to 692,4626.15.86391.82.7+1,823
70 to 742,3856.05.64521.22.1+1,933
75 to 791,4803.73.83030.81.5+1,177
80 to 848642.22.31090.30.7+755
85 and over9452.42.2640.20.3+880
Total population40,064100.0100.036,317100.0100.0+3,747
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 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, 17.7% of the population was aged between 0 and 15, and 20.3% were aged 65 years and over, compared with 18.0% and 19.7% 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 5.9%)

Emerging groups

From 1991 to 2021, Northern District's population increased by 3,747 people (10.3%). This represents an average annual population change of 0.33% per year over the period.

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

  • 60 to 64 (+1,994 persons)
  • 70 to 74 (+1,933 persons)
  • 65 to 69 (+1,823 persons)
  • 55 to 59 (+1,815 persons)

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