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City of WannerooPopulation forecast

Alexander Heights

Population and age structure

Between 2021 and 2031, the age structure forecasts for Alexander Heights indicate a 8.8% decrease in population under working age, a 57.2% increase in population of retirement age, and a 9.3% decrease 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 Wanneroo 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
Alexander Heights - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 44685.83924.94035.1-65
5 to 95136.44365.44275.4-86
10 to 145126.45346.74715.9-41
15 to 195026.25737.14866.1-16
20 to 245777.26297.85797.3+2
25 to 294806.05416.75456.9+65
30 to 345306.63864.84215.3-109
35 to 395757.23604.53784.8-197
40 to 444836.04826.04125.2-71
45 to 494946.15897.34685.9-26
50 to 545797.25176.44735.9-106
55 to 595717.14175.24575.7-114
60 to 646498.14385.54415.5-208
65 to 694095.14705.94125.2+3
70 to 743123.94725.93734.7+61
75 to 791742.23434.34025.0+228
80 to 841101.42653.33554.5+245
85 and over971.21822.34515.7+354
Total persons8,035100.08,027100.07,953100.0-82
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), March 2024.

Key findings

In 2021, the dominant age structure for persons in Alexander Heights was ages 60 to 64, which accounted for 8.1% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 75 to 79, which is expected to increase by 169 and account for 4.3% of the total persons.

The largest 5 year age group in 2031 is 20 to 24 years, with a total of 629 persons.

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