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City of ArmadalePopulation forecast

Piara Waters

Population and age structure

Between 2016 and 2031, the age structure forecasts for Piara Waters indicate a 105.2% increase in population under working age, a 322.8% increase in population of retirement age, and a 89.4% 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 Piara Waters 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
Piara Waters - Total persons201620312041Change between 2016 and 2041
Age group (years)Number%Number%Number%Number
0 to 41,29913.61,8909.91,9729.1+673
5 to 97658.01,8389.61,8848.7+1,119
10 to 144604.81,4517.61,6007.4+1,140
15 to 193864.11,1325.91,3496.2+963
20 to 245996.39575.01,1815.5+582
25 to 291,21712.81,3807.21,5157.0+298
30 to 341,53316.11,8289.51,8888.7+355
35 to 391,06311.21,8939.91,9068.8+843
40 to 446176.51,7038.91,6997.9+1,082
45 to 494504.71,4277.51,5027.0+1,052
50 to 543703.91,0335.41,3176.1+947
55 to 592382.57303.81,0925.1+854
60 to 642092.25703.08273.8+618
65 to 691611.74612.46212.9+460
70 to 74700.73231.74702.2+400
75 to 79540.62471.33601.7+306
80 to 84160.21720.92531.2+237
85 and over100.11120.61690.8+159
Total persons9,517100.019,147100.021,606100.0+12,089
Source: Population and household forecasts, 2016 to 2041, prepared by .id (informed decisions), December 2018.

Key findings

In 2016, the dominant age structure for persons in Piara Waters was ages 30 to 34, which accounted for 16.1% of the total persons.

The largest increase in persons between 2016 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 1,086 and account for 8.9% of the total persons.

The largest 5 year age group in 2031 is 35 to 39 years, with a total of 1,893 persons.

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