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Hobsons Bay CityCommunity profile

Williamstown

Five year age groups

In 2021, the largest age group in Williamstown was 50 to 54 year olds. The group that changed the most since 2016 was 70 to 74 year olds, increasing by 226 people.

The Age Structure of Williamstown provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Williamstown'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 Williamstown'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
Williamstown - Total persons (Usual residence)20212016Change
Five year age groups (years)Number%Hobsons Bay City %Number%Hobsons Bay City %2016 to 2021
0 to 44734.16.36595.96.8-186
5 to 97496.46.48037.26.4-55
10 to 149167.95.86956.25.2+220
15 to 197106.14.97026.35.2+8
20 to 245744.95.05825.25.8-8
25 to 294273.76.24964.46.9-70
30 to 345164.47.45314.87.8-15
35 to 396025.28.17086.37.6-107
40 to 448046.97.58397.57.6-35
45 to 499418.17.19668.77.3-26
50 to 541,0198.77.09658.66.9+54
55 to 599888.56.38948.06.4+93
60 to 648597.45.87206.45.2+138
65 to 697026.04.86075.44.4+95
70 to 745975.14.13713.33.3+226
75 to 793663.12.82512.32.7+114
80 to 842011.72.11681.52.2+32
85 and over2031.72.32091.92.2-7
Total population11,647100.0100.011,174100.0100.0+472
Source: Australian Bureau of Statistics, Census of Population and Housing 2016 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 Williamstown in 2021 compared to Hobsons Bay City 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, 18.4% of the population was aged between 0 and 15, and 17.8% were aged 65 years and over, compared with 18.5% and 16.1% respectively for Hobsons Bay City.

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

  • A smaller percentage of persons aged 30 to 34 (4.4% compared to 7.4%)
  • A smaller percentage of persons aged 35 to 39 (5.2% compared to 8.1%)
  • A smaller percentage of persons aged 25 to 29 (3.7% compared to 6.2%)
  • A smaller percentage of persons aged 0 to 4 (4.1% compared to 6.3%)

Emerging groups

From 2016 to 2021, Williamstown's population increased by 473 people (4.2%). This represents an average annual population change of 0.83% per year over the period.

The largest changes in age structure in this area between 2016 and 2021 were in the age groups:

  • 70 to 74 (+226 persons)
  • 10 to 14 (+220 persons)
  • 0 to 4 (-186 persons)
  • 60 to 64 (+138 persons)

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