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City of WhitehorsePopulation forecast

Blackburn

Population and age structure

Between 2021 and 2031, the age structure forecasts for Blackburn indicate a 17.9% increase in males under working age, a 19.4% increase in males of retirement age, and a 17.6% 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 Whitehorse 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
Blackburn - Total males202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 43154.44435.24885.1+173
5 to 94025.64585.45085.3+106
10 to 144666.54945.85706.0+104
15 to 194716.65666.76206.5+149
20 to 245477.66397.66887.2+141
25 to 294876.85766.86386.7+151
30 to 344466.25396.45936.2+147
35 to 394816.75886.96496.8+168
40 to 444666.55997.16657.0+199
45 to 495087.15836.96536.9+145
50 to 544636.55296.26226.5+159
55 to 594736.65226.25836.1+110
60 to 644336.04745.65315.6+98
65 to 693464.84515.34975.2+151
70 to 742673.73684.34064.3+139
75 to 792483.52743.23533.7+105
80 to 841552.21752.12412.5+86
85 and over2032.81872.22012.1-2
Total persons7,177100.08,466100.09,505100.0+2,328
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), June 2023.

Key findings

In 2021, the dominant age structure for males in Blackburn was ages 20 to 24, which accounted for 7.6% 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 133 and account for 7.1% of the total males.

The largest male 5 year age group in 2031 is 20 to 24 years, with a total of 639 males.

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