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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 4.1% decrease in females under working age, a 33.3% increase in females of retirement age, and a 17.6% increase in females 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 females202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 42682.12401.63011.7+33
5 to 92391.91861.32151.2-24
10 to 142421.92922.03291.9+87
15 to 198767.01,3238.91,3977.9+521
20 to 242,35318.92,50716.92,73115.4+378
25 to 291,75114.01,96013.22,40013.5+649
30 to 341,1829.51,2968.71,6609.4+478
35 to 398126.59586.51,1926.7+380
40 to 446425.18996.11,0275.8+385
45 to 495294.28135.59845.5+455
50 to 544843.95974.08264.7+342
55 to 595574.54903.37013.9+144
60 to 645484.46014.17894.4+241
65 to 695764.66964.77454.2+169
70 to 745534.46134.16903.9+137
75 to 793542.85453.76383.6+284
80 to 842431.94012.74782.7+235
85 and over2722.24082.86493.7+377
Total persons12,481100.014,827100.017,754100.0+5,273
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), December 2023.

Key findings

In 2021, the dominant age structure for females in City of Adelaide was ages 20 to 24, which accounted for 18.9% of the total females.

The largest increase in females between 2021 and 2031 is forecast to be in ages 15 to 19, which is expected to increase by 447 and account for 8.9% of the total females.

The largest female 5 year age group in 2031 is 20 to 24 years, with a total of 2,507 females.

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