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City of Hobsons BayCommunity profile

2016 Census data has been released and we are busy processing it to update this website. View our latest releases here.


Five year age groups

This topic has been updated with 2016 Census data for all areas. What's this?

There were 27 people over the age of 85 living in Seabrook in 2016, with largest age group being 40 to 44 year olds.

The Age Structure of Seabrook provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Seabrook'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 Seabrook's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.


Derived from the Census question:

'What is the person's date of birth or age?'

Age structure - Five year age groups
Seabrook - Total persons (Usual residence)20162011Change
Five year age groups (years)Number%Hobsons Bay City %Number%Hobsons Bay City %2011 to 2016
0 to 43827.56.84058.16.9-23
5 to 94037.96.43807.65.6+23
10 to 143526.95.23477.05.6+5
15 to 192885.75.23587.25.8-70
20 to 243236.45.82885.86.3+35
25 to 293226.36.92805.67.1+42
30 to 343967.87.83617.37.4+35
35 to 394048.07.64368.87.9-32
40 to 444178.27.650210.18.0-85
45 to 493837.57.34479.07.5-64
50 to 544128.16.93176.47.0+95
55 to 593146.26.42875.85.8+27
60 to 642575.15.22074.25.0+50
65 to 691553.14.41442.93.8+11
70 to 741262.53.31192.43.2+7
75 to 79811.62.7651.32.9+16
80 to 84340.72.2250.52.2+9
85 and over270.52.2100.21.9+17
Total population5,076100.0100.04,978100.0100.0+98
Source: Australian Bureau of Statistics, Census of Population and Housing 2011 and 2016. Compiled and presented by .id , the population experts.

Please refer to specific data notes for more information

Dominant groups

Analysis of the five year age groups of Seabrook in 2016 compared to Hobsons Bay City shows that there was a higher proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).

Overall, 22.4% of the population was aged between 0 and 15, and 8.3% were aged 65 years and over, compared with 18.4% and 14.8% respectively for Hobsons Bay City.

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

  • A larger percentage of persons aged 10 to 14 (6.9% compared to 5.2%)
  • A larger percentage of persons aged 5 to 9 (7.9% compared to 6.4%)
  • A smaller percentage of persons aged 85 and over (0.5% compared to 2.2%)
  • A smaller percentage of persons aged 80 to 84 (0.7% compared to 2.2%)

Emerging groups

From 2011 to 2016, Seabrook's population increased by 98 people (2.0%). This represents an average annual population change of 0.39% per year over the period.

The largest changes in age structure in this area between 2011 and 2016 were in the age groups:

  • 50 to 54 (+95 persons)
  • 40 to 44 (-85 persons)
  • 15 to 19 (-70 persons)
  • 45 to 49 (-64 persons)