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City of JoondalupPopulation forecast


Population and age structure

Between 2016 and 2031, the age structure forecasts for Iluka indicate a 13.2% decrease in population under working age, a 129.1% increase in population of retirement age, and a 12.4% 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 Iluka 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
Iluka - Total persons201620312041Change between 2016 and 2041
Age group (years)Number%Number%Number%Number
0 to 42464.42534.52324.2-14
5 to 93826.83386.03135.7-69
10 to 145259.34107.23837.0-142
15 to 195149.14177.43897.1-125
20 to 244247.53235.72935.4-131
25 to 291703.02013.51733.2+3
30 to 341642.91883.31713.1+7
35 to 392474.42674.72424.4-5
40 to 444367.73456.13306.0-106
45 to 4963311.24207.44007.3-233
50 to 5460610.74337.64027.4-204
55 to 594808.54387.73807.0-100
60 to 643095.54568.03576.5+48
65 to 692163.84207.43626.6+146
70 to 741392.53506.23736.8+234
75 to 79751.32163.83185.8+243
80 to 84571.01242.22264.1+169
85 and over290.5721.31202.2+91
Total persons5,652100.05,671100.05,464100.0-188
Population and household forecasts, 2016 to 2041, prepared by .id , the population experts, December 2018.

Key findings

In 2016, the dominant age structure for persons in Iluka was ages 45 to 49, which accounted for 11.2% of the total persons.

The largest increase in persons between 2016 and 2031 is forecast to be in ages 70 to 74, which is expected to increase by 211 and account for 6.2% of the total persons.

The largest 5 year age group in 2031 is 60 to 64 years, with a total of 456 persons.

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