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City of BrimbankPopulation forecast

City of Brimbank

Population and age structure

Between 2021 and 2031, the age structure forecasts for City of Brimbank indicate a 5.9% increase in females under working age, a 18.2% increase in females of retirement age, and a 7.6% 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 Brimbank 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 Brimbank - Total females202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 45,4825.66,3846.06,8775.9+1,395
5 to 95,7505.95,7575.46,1965.3+446
10 to 145,4445.65,5125.26,0755.2+631
15 to 195,5835.76,1265.76,3965.5+813
20 to 246,4656.67,1046.77,5846.5+1,119
25 to 297,4047.68,2477.79,0687.8+1,664
30 to 347,4797.68,1867.78,9667.7+1,487
35 to 397,0327.27,5687.18,2897.2+1,257
40 to 446,1996.37,0666.67,6856.6+1,486
45 to 496,2966.46,7506.37,2646.3+968
50 to 546,3526.56,2345.86,9516.0+599
55 to 595,9316.16,1845.86,6515.7+720
60 to 645,8085.95,9925.66,0925.3+284
65 to 695,0785.25,3215.05,6254.9+547
70 to 744,2824.44,8324.55,0724.4+790
75 to 792,9363.04,0053.84,3033.7+1,367
80 to 842,0352.12,8652.73,3322.9+1,297
85 and over2,2452.32,5642.43,4513.0+1,206
Total persons97,801100.0106,696100.0115,878100.0+18,077
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), July 2023.

Key findings

In 2021, the dominant age structure for females in City of Brimbank was ages 30 to 34, which accounted for 7.6% of the total females.

The largest increase in females between 2021 and 2031 is forecast to be in ages 75 to 79, which is expected to increase by 1,069 and account for 3.8% of the total females.

The largest female 5 year age group in 2031 is 25 to 29 years, with a total of 8,247 females.

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