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Shire of Serpentine JarrahdalePopulation forecast

Shire of Serpentine Jarrahdale

Population and age structure

Between 2016 and 2026, the age structure forecasts for the Shire of Serpentine Jarrahdale indicate a 64.9% increase in females under working age, a 74.9% increase in females of retirement age, and a 75.0% increase in females 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
Shire of Serpentine Jarrahdale - Total females201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 41,1908.81,6807.22,4057.0+1,215
5 to 91,0457.71,7477.52,3757.0+1,331
10 to 149667.11,8517.92,4817.3+1,515
15 to 198776.51,7607.52,5447.5+1,667
20 to 249907.31,8067.72,7658.1+1,775
25 to 291,1938.81,9088.22,8458.3+1,652
30 to 341,1438.51,8918.12,7648.1+1,621
35 to 399346.91,7857.62,5067.3+1,572
40 to 449427.01,6927.22,2896.7+1,347
45 to 499457.01,5136.52,2116.5+1,265
50 to 548576.31,3946.02,1336.2+1,275
55 to 597435.51,2795.51,8935.5+1,150
60 to 645634.21,0524.51,6034.7+1,040
65 to 694413.37603.31,2533.7+811
70 to 742882.15082.28892.6+601
75 to 792111.63361.45501.6+339
80 to 841030.81940.83070.9+204
85 and over970.71960.83160.9+219
Total persons13,528100.023,352100.034,127100.0+20,599
Source: Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), November 2017.

Key findings

In 2016, the dominant age structure for females in the Shire of Serpentine Jarrahdale was ages 25 to 29, which accounted for 8.8% of the total females.

The largest increase in females between 2016 and 2026 is forecast to be in ages 10 to 14, which is expected to increase by 885 and account for 7.9% of the total females.

The largest female 5 year age group in 2026 is 25 to 29 years, with a total of 1,908 females.

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