svg rectangle color
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 60.5% increase in males under working age, a 67.8% increase in males of retirement age, and a 69.8% 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
Shire of Serpentine Jarrahdale - Total males201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 41,2809.11,8527.82,6607.8+1,380
5 to 91,2158.61,8517.82,5107.3+1,295
10 to 149416.71,8137.72,4187.1+1,477
15 to 198736.21,6937.22,3666.9+1,494
20 to 249296.61,8367.82,7318.0+1,802
25 to 291,1798.31,9818.42,9058.5+1,726
30 to 341,2098.61,8317.72,7187.9+1,509
35 to 391,0027.11,7467.42,4947.3+1,492
40 to 449196.51,7137.22,3216.8+1,402
45 to 491,0047.11,5796.72,2776.7+1,273
50 to 549476.71,2765.42,0055.9+1,058
55 to 597385.21,2025.11,7735.2+1,035
60 to 645904.21,0884.61,5184.4+928
65 to 695353.87893.31,2283.6+693
70 to 743472.55752.49652.8+617
75 to 792241.64121.76341.9+410
80 to 841080.82361.03931.1+285
85 and over860.61690.72910.9+205
Total persons14,126100.023,643100.034,209100.0+20,083
Source: Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), November 2017.

Key findings

In 2016, the dominant age structure for males in the Shire of Serpentine Jarrahdale was ages 0 to 4, which accounted for 9.1% of the total males.

The largest increase in males between 2016 and 2026 is forecast to be in ages 20 to 24, which is expected to increase by 907 and account for 7.8% of the total males.

The largest male 5 year age group in 2026 is 25 to 29 years, with a total of 1,981 males.

DISCLAIMER: While all due care has been taken to ensure that the content of this website is accurate and current, there may be errors or omissions in it and no legal responsibility is accepted for the information and opinions in this website.

Please view our Privacy Policy, Terms of use and Legal notices. Stats NZ Data and the copyright in the Stats NZ Data remains the property of the Statistics New Zealand.

The copyright in the way .id has modified, transformed or reconfigured the Stats NZ Data as published on this website remains the property of .id. Stats NZ Data can be accessed on the Statistics New Zealand website at Unless otherwise specified, content that Stats NZ produce is licensed under the Creative Commons Attribution 4.0 International licence. For further information see