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City of KnoxPopulation forecast

Boronia

Population and age structure

Between 2021 and 2031, the age structure forecasts for Boronia indicate a 7.6% decrease in males under working age, a 6.1% increase in males of retirement age, and a 9.6% 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 Knox 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
Boronia - Total males202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 47256.26895.66975.4-28
5 to 97046.06185.06334.9-70
10 to 146715.86335.16304.9-41
15 to 195985.16775.56555.1+57
20 to 246505.67556.17475.8+98
25 to 298457.28997.39167.1+71
30 to 341,0168.71,0328.41,0558.2+39
35 to 399818.41,0218.31,0498.2+68
40 to 448147.09687.89917.7+176
45 to 497946.89037.39357.3+140
50 to 547006.07696.28496.6+149
55 to 596315.47105.77836.1+151
60 to 645985.16265.17095.5+111
65 to 695414.65034.15694.4+28
70 to 745104.44283.54763.7-34
75 to 793573.14093.34183.3+60
80 to 842852.43773.03482.7+63
85 and over2432.13382.73622.8+119
Total persons11,664100.012,354100.012,823100.0+1,159
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), June 2023.

Key findings

In 2021, the dominant age structure for males in Boronia was ages 30 to 34, which accounted for 8.7% 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 154 and account for 7.8% of the total males.

The largest male 5 year age group in 2031 is 30 to 34 years, with a total of 1,032 males.

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