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City of JoondalupPopulation forecast

Duncraig

Population and age structure

Between 2021 and 2031, the age structure forecasts for Duncraig indicate a 17.1% decrease in males under working age, a 28.6% increase in males of retirement age, and a 0.1% increase in males 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 Joondalup 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
Duncraig - Total males202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 44976.13994.84275.0-70
5 to 96337.75396.55176.1-116
10 to 147769.56427.75806.9-196
15 to 195937.26607.95546.6-39
20 to 243534.34505.43794.5+26
25 to 292823.42392.92513.0-31
30 to 343354.13123.73554.2+20
35 to 395306.54475.44695.5-61
40 to 445837.14955.94765.6-107
45 to 496608.05857.05176.1-143
50 to 545516.75646.85166.1-35
55 to 594405.45516.64965.9+56
60 to 644445.44735.75106.0+66
65 to 694906.04996.05216.2+31
70 to 744305.25466.66487.7+218
75 to 793424.24625.55406.4+198
80 to 841632.02593.13534.2+190
85 and over1061.32032.43494.1+243
Total persons8,208100.08,325100.08,461100.0+253
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), March 2024.

Key findings

In 2021, the dominant age structure for males in Duncraig was ages 10 to 14, which accounted for 9.5% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 75 to 79, which is expected to increase by 120 and account for 5.5% of the total males.

The largest male 5 year age group in 2031 is 15 to 19 years, with a total of 660 males.

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