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City of KwinanaPopulation forecast

City of Kwinana

Population and age structure

Between 2016 and 2026, the age structure forecasts for the City of Kwinana indicate a 63.6% increase in population under working age, a 63.4% increase in population of retirement age, and a 52.7% 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 Kwinana 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
City of Kwinana - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 43,5828.95,8159.27,7629.1+4,180
5 to 93,0567.64,9137.86,7207.9+3,664
10 to 142,3685.94,0066.45,4516.4+3,083
15 to 192,3785.93,8956.25,1766.1+2,798
20 to 243,0957.74,7747.66,3797.5+3,284
25 to 293,8629.65,8469.37,7169.1+3,854
30 to 344,20910.45,8139.27,6979.0+3,488
35 to 393,2318.05,1288.26,7207.9+3,489
40 to 442,8427.14,5807.35,7616.8+2,919
45 to 492,5756.43,8766.25,2146.1+2,639
50 to 542,1235.33,2295.14,5715.4+2,448
55 to 591,8274.52,8044.53,8534.5+2,026
60 to 641,5423.82,3183.73,2143.8+1,672
65 to 691,2723.21,8913.02,6803.1+1,408
70 to 749292.31,4902.42,1922.6+1,263
75 to 796761.71,1751.91,7542.1+1,078
80 to 844231.06991.11,1501.4+727
85 and over3150.86511.01,1501.4+835
Total persons40,305100.062,902100.085,158100.0+44,853
Source: Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), March 2018.

Key findings

In 2016, the dominant age structure for persons in the City of Kwinana was ages 30 to 34, which accounted for 10.4% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 0 to 4, which is expected to increase by 2,233 and account for 9.2% of the total persons.

The largest 5 year age group in 2026 is 25 to 29 years, with a total of 5,846 persons.

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