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City of KalamundaPopulation forecast

Wattle Grove

Population and age structure

Between 2021 and 2031, the age structure forecasts for Wattle Grove indicate a 24.9% decrease in population under working age, a 119.6% increase in population of retirement age, and a 24.8% 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 Kalamunda 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
Wattle Grove - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 46209.24325.54215.3-199
5 to 967910.14696.04355.5-244
10 to 146669.95757.44605.8-206
15 to 194476.66678.65236.6+76
20 to 243535.26398.25286.6+174
25 to 292493.74115.34245.3+176
30 to 345618.34255.54515.7-110
35 to 3979211.84926.35416.8-251
40 to 446469.67019.05837.3-63
45 to 494426.678010.06197.8+177
50 to 543585.36328.15757.2+217
55 to 593274.94125.35607.1+233
60 to 642233.33294.24966.2+273
65 to 691762.62673.43724.7+196
70 to 741151.71992.62663.3+151
75 to 79320.51832.32503.2+219
80 to 84150.21131.42122.7+197
85 and over340.5550.72292.9+196
Total persons6,735100.07,780100.07,946100.0+1,211
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), January 2024.

Key findings

In 2021, the dominant age structure for persons in Wattle Grove was ages 35 to 39, which accounted for 11.8% 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 337 and account for 10.0% of the total persons.

The largest 5 year age group in 2031 is 45 to 49 years, with a total of 780 persons.

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