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City of AdelaidePopulation forecast

CAD West

Population and age structure

Between 2021 and 2031, the age structure forecasts for CAD West indicate a 211.0% increase in population under working age, a 199.1% increase in population of retirement age, and a 7.1% 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 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
CAD West - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 4340.7921.61201.7+86
5 to 9140.3551.0660.9+52
10 to 14250.5801.4961.3+71
15 to 193607.64157.44085.7+48
20 to 241,53832.689015.896813.5-569
25 to 2995220.281414.51,01414.2+63
30 to 3457712.263411.381111.3+234
35 to 392946.25049.06388.9+344
40 to 441713.64407.85287.4+357
45 to 491723.63796.74876.8+315
50 to 541793.82494.43845.4+205
55 to 59922.02023.63094.3+217
60 to 64942.02153.82994.2+205
65 to 69811.72183.92833.9+202
70 to 74771.61853.32533.5+176
75 to 79250.51132.01982.8+173
80 to 84180.4731.31211.7+103
85 and over210.4751.31762.5+155
Total persons4,723100.05,634100.07,160100.0+2,437
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), December 2023.

Key findings

In 2021, the dominant age structure for persons in CAD West was ages 20 to 24, which accounted for 32.6% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 269 and account for 7.8% of the total persons.

The largest 5 year age group in 2031 is 20 to 24 years, with a total of 890 persons.

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