idc-logo
svg rectangle color
AustraliaPopulation forecast

Western Australia

Population and age structure

Between 2021 and 2031, the age structure forecasts for Western Australia indicate a 4.3% increase in males under working age, a 39.2% increase in males of retirement age, and a 15.6% 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 Australia 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.

Forecast age structure - 5 year age groups
Western Australia - Total males202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 488,0526.492,3555.7106,2165.8+18,164
5 to 992,5696.794,7405.9103,7045.7+11,135
10 to 1492,2906.797,5586.1101,5385.6+9,248
15 to 1981,8105.9101,6446.3103,3965.7+21,586
20 to 2485,9686.2110,7056.9115,8866.3+29,918
25 to 2993,3186.8111,9957.0131,6227.2+38,304
30 to 34102,2327.4111,6276.9135,8677.4+33,635
35 to 39104,9047.6108,8366.8125,8896.9+20,985
40 to 4491,4946.6112,6047.0120,3846.6+28,890
45 to 4990,8196.6110,9536.9113,8026.2+22,983
50 to 5489,5626.593,7725.8113,6196.2+24,057
55 to 5983,5866.190,2685.6109,3056.0+25,719
60 to 6475,6225.587,0825.490,7715.0+15,149
65 to 6964,4894.779,2884.985,7844.7+21,295
70 to 7457,0004.169,5724.381,0304.4+24,030
75 to 7938,2482.856,0793.570,7103.9+32,462
80 to 8424,5811.843,9662.756,2093.1+31,628
85 and over19,9331.435,3372.260,7003.3+40,767
Total persons1,376,477100.01,608,381100.01,826,431100.0+449,954
Source: .id SAFi National to State tops-down forecast, 5.1.0, published May 2023. Prepared by .id (informed decisions)

Key findings

In 2021, the dominant age structure for males in Western Australia was ages 35 to 39, which accounted for 7.6% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 20 to 24, which is expected to increase by 24,737 and account for 6.9% of the total males.

The largest male 5 year age group in 2031 is 40 to 44 years, with a total of 112,604 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.

ABS Data and the copyright in the ABS Data remains the property of the Australian Bureau of Statistics. The copyright in the way .id has modified, transformed or reconfigured the ABS Data as published on this website remains the property of .id. ABS Data can be accessed from the Australian Bureau of Statistics at www.abs.gov.au. ABS data can be used under license - terms published on ABS website. intermediary.management@abs.gov.au if you have any queries or wish to distribute any ABS data.