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City of MeltonPopulation forecast

Bonnie Brook

Population and age structure

Between 2021 and 2031, the age structure forecasts for Bonnie Brook indicate a 2325.0% increase in females under working age, a 1233.3% increase in females of retirement age, and a 1110.6% 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 Melton 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
Bonnie Brook - Total females202120312051Change between 2021 and 2051
Age group (years)Number%Number%Number%Number
0 to 433.7858.58418.3+838
5 to 933.8747.46426.3+639
10 to 1422.6353.53613.6+359
15 to 1945.4141.41992.0+194
20 to 2456.6232.23903.8+385
25 to 29912.4585.87917.8+782
30 to 3468.511411.31,16811.5+1,161
35 to 3968.412512.41,21211.9+1,206
40 to 4457.2676.77327.2+726
45 to 4934.3414.14614.5+458
50 to 5434.6373.63603.5+356
55 to 5967.7383.84644.6+459
60 to 6400.3525.23013.0+301
65 to 6979.9272.73173.1+310
70 to 7445.9555.55385.3+533
75 to 7945.6777.76556.5+651
80 to 8411.4585.84114.1+410
85 and over22.0232.23103.1+308
Total persons76100.01,003100.010,152100.0+10,076
Source: Population and household forecasts, 2021 to 2051, prepared by .id (informed decisions), June 2023.

Key findings

In 2021, the dominant age structure for females in Bonnie Brook was ages 25 to 29, which accounted for 12.4% of the total females.

The largest increase in females between 2021 and 2031 is forecast to be in ages 35 to 39, which is expected to increase by 118 and account for 12.4% of the total females.

The largest female 5 year age group in 2031 is 35 to 39 years, with a total of 125 females.

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