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 56.7% increase in population under working age, a 75.8% increase in population of retirement age, and a 72.8% increase 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 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 - Service age groups
Shire of Serpentine Jarrahdale - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
Babies and pre-schoolers (0 to 4)2,4708.93,5327.55,0657.4+2,595
Primary schoolers (5 to 11)3,03711.05,10010.96,85410.0+3,817
Secondary schoolers (12 to 17)2,1998.04,2269.05,8478.6+3,648
Tertiary education and independence (18 to 24)2,6009.45,03110.77,49011.0+4,890
Young workforce (25 to 34)4,72417.17,61216.211,23216.4+6,508
Parents and homebuilders (35 to 49)5,74520.810,02921.314,09720.6+8,353
Older workers and pre-retirees (50 to 59)3,28611.95,15011.07,80411.4+4,518
Empty nesters and retirees (60 to 69)2,1297.73,6907.95,6028.2+3,472
Seniors (70 to 84)1,2814.62,2614.83,7385.5+2,456
Elderly aged (85 and over)1830.73650.86070.9+425
Total persons27,654100.046,995100.068,335100.0+40,682
Source: Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), November 2017.

Key findings

In 2016, the dominant age structure for persons in the Shire of Serpentine Jarrahdale was ages Parents and homebuilders (35 to 49), which accounted for 20.8% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages Parents and homebuilders (35 to 49), which is expected to increase by 4,284 and account for 21.3% of the total persons.

The largest 5 year age group in 2026 is Parents and homebuilders (35 to 49) years, with a total of 10,029 persons.

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