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City of BrimbankPopulation forecast

City of Brimbank

Population and age structure

Between 2016 and 2026, the age structure forecasts for the City of Brimbank indicate a 7.1% increase in population under working age, a 29.2% increase in population of retirement age, and a 1.9% 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 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 persons201620262041Change between 2016 and 2041
Age group (years)Number%Number%Number%Number
0 to 414,0666.814,4476.614,8826.5+816
5 to 912,4166.013,5636.213,8026.0+1,386
10 to 1411,6085.612,7935.813,2905.8+1,682
15 to 1912,9116.313,7086.314,4746.3+1,563
20 to 2416,7478.116,7247.617,6257.7+878
25 to 2917,6128.618,0988.318,7498.1+1,137
30 to 3416,6968.116,8407.717,3017.5+605
35 to 3914,1476.915,4027.015,9286.9+1,781
40 to 4413,4416.514,4196.614,9036.5+1,462
45 to 4913,2186.412,9655.914,0016.1+783
50 to 5412,6636.212,3445.613,1325.7+469
55 to 5912,2185.911,7135.312,0165.2-202
60 to 6410,8305.310,8715.010,5624.6-268
65 to 699,5294.610,1544.69,6634.2+134
70 to 746,6423.28,9584.19,0223.9+2,380
75 to 794,7452.37,3933.48,1843.6+3,439
80 to 843,2941.64,6212.16,7102.9+3,416
85 and over2,9581.43,9671.85,9412.6+2,984
Total persons205,741100.0218,978100.0230,187100.0+24,446
Population and household forecasts, 2016 to 2041, prepared by .id (informed decisions), September 2017.

Key findings

In 2016, the dominant age structure for persons in the City of Brimbank was ages 25 to 29, which accounted for 8.6% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 75 to 79, which is expected to increase by 2,648 and account for 3.4% of the total persons.

The largest 5 year age group in 2026 is 25 to 29 years, with a total of 18,098 persons.

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