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Shire of Serpentine JarrahdalePopulation forecast

Mundijong area

Population and age structure

Between 2021 and 2031, the age structure forecasts for Mundijong area indicate a 55.4% increase in males under working age, a 47.4% increase in males of retirement age, and a 81.1% 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 Shire of Serpentine Jarrahdale 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
Mundijong area - Total males202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 414610.81958.41,5519.5+1,404
5 to 91138.31888.11,4679.0+1,354
10 to 14866.31536.61,1397.0+1,053
15 to 19685.01416.19595.9+891
20 to 241027.51717.41,0416.4+939
25 to 291067.81888.11,2998.0+1,193
30 to 341188.71837.91,3988.6+1,280
35 to 39725.31546.71,3438.3+1,271
40 to 44493.61566.71,2077.4+1,158
45 to 49685.01436.21,0286.3+960
50 to 54916.71265.59195.6+828
55 to 59896.61466.39956.1+905
60 to 64775.71134.96634.1+586
65 to 69544.0893.84752.9+421
70 to 74513.8632.73302.0+279
75 to 79302.2421.82111.3+181
80 to 84231.7351.51350.8+112
85 and over151.1261.11090.7+94
Total persons1,359100.02,311100.016,269100.0+14,909
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), December 2023.

Key findings

In 2021, the dominant age structure for males in Mundijong area was ages 0 to 4, which accounted for 10.8% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 107 and account for 6.7% of the total males.

The largest male 5 year age group in 2031 is 0 to 4 years, with a total of 195 males.

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