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City of CockburnPopulation forecast

Aubin Grove - Banjup

Population and age structure

Between 2021 and 2031, the age structure forecasts for Aubin Grove - Banjup indicate a 17.5% decrease in population under working age, a 30.6% increase in population of retirement age, and a 10.8% increase in population of working age.

Knowledge of how the age structure of the population is changing is essential for planning age-based facilities and services, such as child care, recreation and aged care.

The forecast age groups of the City of Cockburn is a function of the current age of the population (people aging each year, being born and dying) as well as the age of people migrating into and out of the area. This in turn is driven by location (fringe, city centre, regional or rural) the existing housing stock (separate dwellings, medium or high density), the amount and type of new residential development (same as existing stock, or diversifying) and where the area is in a cycle of change. We call this the area’s residential role and function. You can learn more about this in the section household and suburb life cycles.

Forecast age structure - 5 year age groups
Aubin Grove - Banjup - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 46788.06257.06867.3+8
5 to 988810.56837.77107.6-178
10 to 147769.26247.06286.7-148
15 to 194875.76467.36196.6+132
20 to 244765.66827.76587.0+182
25 to 293794.55996.86597.0+280
30 to 346677.95716.46687.1+1
35 to 3993011.06126.97017.5-229
40 to 447839.27518.57217.7-62
45 to 495876.97268.26316.7+44
50 to 544665.55376.15315.7+65
55 to 593514.14765.45115.4+160
60 to 642763.33844.34364.6+160
65 to 692663.12713.13103.3+44
70 to 741852.21942.22412.6+56
75 to 79951.11782.02242.4+129
80 to 84871.01792.02142.3+127
85 and over951.11291.52372.5+142
Total persons8,472100.08,868100.09,385100.0+913
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), December 2023.

Key findings

In 2021, the dominant age structure for persons in Aubin Grove - Banjup was ages 35 to 39, which accounted for 11.0% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 25 to 29, which is expected to increase by 220 and account for 6.8% of the total persons.

The largest 5 year age group in 2031 is 40 to 44 years, with a total of 751 persons.

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