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City of GosnellsPopulation forecast

Southern River (East)

Population and age structure

Between 2021 and 2031, the age structure forecasts for Southern River (East) indicate a 152.9% increase in population under working age, a 162.6% increase in population of retirement age, and a 221.3% 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 City of Gosnells 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
Southern River (East) - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 422410.25137.81,5217.8+1,297
5 to 91908.64867.41,4397.4+1,249
10 to 141667.54687.11,3146.7+1,148
15 to 191265.74546.91,2186.2+1,092
20 to 241024.65468.31,4137.2+1,311
25 to 291717.85818.91,6258.3+1,454
30 to 3424811.35548.41,6538.5+1,405
35 to 3926612.15468.31,7238.8+1,457
40 to 441577.15057.71,5227.8+1,365
45 to 491205.54627.11,3006.7+1,180
50 to 541014.63785.81,1966.1+1,095
55 to 59693.13074.71,0475.4+978
60 to 64612.82333.68034.1+742
65 to 69492.21562.45052.6+456
70 to 74663.01302.03952.0+329
75 to 79522.41101.73361.7+284
80 to 84311.4741.12401.2+209
85 and over00.0500.82771.4+277
Total persons2,199100.06,553100.019,525100.0+17,326
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), February 2024.

Key findings

In 2021, the dominant age structure for persons in Southern River (East) was ages 35 to 39, which accounted for 12.1% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 20 to 24, which is expected to increase by 444 and account for 8.3% of the total persons.

The largest 5 year age group in 2031 is 25 to 29 years, with a total of 581 persons.

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