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Hobsons Bay CityCommunity profile

Hobsons Bay City

Five year age groups

In 2021, the largest age group in Hobsons Bay City was 35 to 39 year olds. The group that changed the most since 2016 was 70 to 74 year olds, increasing by 776 people.

The Age Structure of Hobsons Bay City provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Hobsons Bay City'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 Hobsons Bay City'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
Hobsons Bay City - Total persons (Usual residence)20212016Change
Five year age groups (years)Number%Williamstown %Number%Williamstown %2016 to 2021
0 to 45,7756.34.16,0626.85.9-287
5 to 95,8186.46.45,6676.47.2+151
10 to 145,3425.87.94,6235.26.2+719
15 to 194,4744.96.14,6565.26.3-182
20 to 244,5555.04.95,1735.85.2-618
25 to 295,6446.23.76,1676.94.4-523
30 to 346,7887.44.46,9297.84.8-141
35 to 397,4158.15.26,7107.66.3+705
40 to 446,8327.56.96,7267.67.5+106
45 to 496,4857.18.16,5217.38.7-36
50 to 546,4157.08.76,1176.98.6+298
55 to 595,7546.38.55,7076.48.0+47
60 to 645,3135.87.44,6005.26.4+713
65 to 694,3514.86.03,9304.45.4+421
70 to 743,6994.15.12,9233.33.3+776
75 to 792,5982.83.12,3632.72.3+235
80 to 841,9502.11.71,9582.21.5-8
85 and over2,1152.31.71,9522.21.9+163
Total population91,323100.0100.088,784100.0100.0+2,539
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 Hobsons Bay City in 2021 compared to Williamstown shows that there was a similar proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).

Overall, 18.5% of the population was aged between 0 and 15, and 16.1% were aged 65 years and over, compared with 18.4% and 17.8% respectively for Williamstown.

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

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

Emerging groups

From 2016 to 2021, Hobsons Bay City's population increased by 2,539 people (2.9%). This represents an average annual population change of 0.57% 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 (+776 persons)
  • 10 to 14 (+719 persons)
  • 60 to 64 (+713 persons)
  • 35 to 39 (+705 persons)

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