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City of CaseyPopulation forecast

Botanic Ridge

Population and age structure

Between 2021 and 2036, the age structure forecasts for Botanic Ridge indicate a 35.5% increase in females under working age, a 343.8% increase in females of retirement age, and a 77.0% 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 Casey 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
Botanic Ridge - Total females202120362046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 437510.94878.04136.8+38
5 to 937911.04677.64337.1+54
10 to 142527.34096.74327.1+180
15 to 191935.63886.43966.5+203
20 to 241604.63485.73125.1+152
25 to 292938.54587.53796.3+86
30 to 3440611.85679.34637.6+57
35 to 393068.95118.44357.2+129
40 to 442386.94287.04036.7+165
45 to 492055.94036.64076.7+202
50 to 542086.03706.13946.5+186
55 to 591414.13135.13555.8+214
60 to 641454.22764.53165.2+171
65 to 69902.62263.72644.4+174
70 to 74511.51592.62233.7+172
75 to 79120.31322.21873.1+175
80 to 8400.0871.41302.1+130
85 and over00.0751.21182.0+118
Total persons3,454100.06,106100.06,061100.0+2,607
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), October 2023.

Key findings

In 2021, the dominant age structure for females in Botanic Ridge was ages 30 to 34, which accounted for 11.8% of the total females.

The largest increase in females between 2021 and 2036 is forecast to be in ages 35 to 39, which is expected to increase by 205 and account for 8.4% of the total females.

The largest female 5 year age group in 2036 is 30 to 34 years, with a total of 567 females.

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