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City of ArmadalePopulation forecast

Harrisdale

Population and age structure

Between 2021 and 2031, the age structure forecasts for Harrisdale indicate a 13.9% decrease in population under working age, a 30.7% increase in population of retirement age, and a 14.5% 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 Armadale 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
Harrisdale - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 41,1719.77035.47145.3-457
5 to 91,24710.31,0518.11,0067.5-241
10 to 141,0949.11,2699.81,0717.9-23
15 to 196695.59947.78666.4+197
20 to 245334.47435.77315.4+198
25 to 296905.76254.86895.1-1
30 to 341,20210.07245.68226.1-380
35 to 391,57013.01,0678.31,1608.6-410
40 to 441,23710.21,54311.91,35410.0+117
45 to 497446.21,58112.21,3119.7+567
50 to 545334.49707.51,0287.6+495
55 to 594423.75234.09306.9+488
60 to 643472.93562.87115.3+364
65 to 692742.32511.93762.8+102
70 to 741761.51891.51941.4+18
75 to 79890.71281.01351.0+46
80 to 84370.31020.81110.8+74
85 and over210.21100.92712.0+250
Total persons12,076100.012,928100.013,482100.0+1,406
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 Harrisdale was ages 35 to 39, which accounted for 13.0% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 45 to 49, which is expected to increase by 837 and account for 12.2% of the total persons.

The largest 5 year age group in 2031 is 45 to 49 years, with a total of 1,581 persons.

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