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City of AdelaidePopulation forecast

City of Adelaide

Population and age structure

Between 2021 and 2031, the age structure forecasts for City of Adelaide indicate a 5.1% decrease in males under working age, a 18.6% increase in males of retirement age, and a 15.2% 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 City of Adelaide 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 Adelaide - Total males202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 42682.13242.23912.1+123
5 to 92632.02091.42391.3-24
10 to 142491.92071.42411.3-8
15 to 196414.91,0387.01,1166.1+475
20 to 242,30517.72,04513.72,26812.4-37
25 to 291,92814.81,82412.32,27412.4+346
30 to 341,38110.61,56810.52,00010.9+619
35 to 391,0337.91,4629.81,7769.7+743
40 to 447055.41,2368.31,4568.0+751
45 to 496865.31,0196.91,2626.9+576
50 to 546044.66974.71,0605.8+456
55 to 596324.96344.38834.8+251
60 to 645624.35513.77274.0+165
65 to 695454.25763.96383.5+93
70 to 745374.15333.66053.3+68
75 to 793192.53982.74652.5+146
80 to 842081.62721.83421.9+134
85 and over1321.02861.95653.1+433
Total persons12,998100.014,880100.018,305100.0+5,307
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), December 2023.

Key findings

In 2021, the dominant age structure for males in City of Adelaide was ages 20 to 24, which accounted for 17.7% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 531 and account for 8.3% of the total males.

The largest male 5 year age group in 2031 is 20 to 24 years, with a total of 2,045 males.

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