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Hobsons Bay CityCommunity profile

Altona North

Five year age groups

In 2021, the largest age group in Altona North was 35 to 39 year olds. The group that changed the most since 1991 was 20 to 24 year olds, decreasing by 838 people.

The Age Structure of Altona North provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Altona North'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 Altona North'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
Altona North - Total persons (Enumerated)20211991Change
Five year age groups (years)Number%Hobsons Bay City %Number%Hobsons Bay City %1991 to 2021
0 to 41,0227.96.36405.17.6+382
5 to 98966.96.46835.46.8+213
10 to 147025.45.98506.76.7-149
15 to 195524.34.91,0638.47.1-511
20 to 246004.65.01,43811.48.8-838
25 to 299367.26.21,0098.09.0-73
30 to 341,0978.57.47676.18.8+329
35 to 391,1238.78.16695.37.4+453
40 to 449557.47.57596.06.9+196
45 to 497946.17.18446.75.5-51
50 to 547135.57.01,0068.05.1-293
55 to 595374.26.39687.74.9-431
60 to 645083.95.87676.14.6-259
65 to 694903.84.75864.64.1-96
70 to 744563.54.02602.12.8+196
75 to 794953.82.82091.72.0+286
80 to 844873.82.1750.61.1+411
85 and over5604.32.3260.20.7+533
Total population12,923100.0100.012,626100.0100.0+297
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 Altona North in 2021 compared to Hobsons Bay City shows that there was a higher proportion of people in the younger age groups (under 15) as well as a higher proportion of people in the older age groups (65+).

Overall, 20.3% of the population was aged between 0 and 15, and 19.3% were aged 65 years and over, compared with 18.6% and 16.0% respectively for Hobsons Bay City.

The major differences between the age structure of Altona North and Hobsons Bay City were:

  • A larger percentage of persons aged 85 and over (4.3% compared to 2.3%)
  • A larger percentage of persons aged 80 to 84 (3.8% compared to 2.1%)
  • A smaller percentage of persons aged 55 to 59 (4.2% compared to 6.3%)
  • A smaller percentage of persons aged 60 to 64 (3.9% compared to 5.8%)

Emerging groups

From 1991 to 2021, Altona North's population increased by 297 people (2.4%). This represents an average annual population change of 0.08% per year over the period.

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

  • 20 to 24 (-838 persons)
  • 85 and over (+533 persons)
  • 15 to 19 (-511 persons)
  • 35 to 39 (+453 persons)

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