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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 32.6% increase in population under working age, a 280.2% increase in population of retirement age, and a 74.6% 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 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 persons202120362046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 477711.49718.28277.1+50
5 to 970010.28897.58337.1+133
10 to 145287.77996.88417.2+313
15 to 193595.37656.57716.6+412
20 to 243395.07156.16515.6+312
25 to 295618.28807.57296.3+168
30 to 3471710.51,0328.88497.3+132
35 to 396259.21,0038.58477.3+222
40 to 445187.68677.47996.9+281
45 to 494076.07626.57766.7+369
50 to 543855.66875.87396.3+354
55 to 592884.25975.16655.7+377
60 to 642874.25254.56005.2+313
65 to 691892.84183.54964.3+307
70 to 741231.83062.64163.6+293
75 to 79260.42472.13422.9+316
80 to 8400.01691.42452.1+245
85 and over10.01491.32251.9+224
Total persons6,830100.011,779100.011,653100.0+4,823
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), October 2023.

Key findings

In 2021, the dominant age structure for persons in Botanic Ridge was ages 0 to 4, which accounted for 11.4% of the total persons.

The largest increase in persons between 2021 and 2036 is forecast to be in ages 15 to 19, which is expected to increase by 406 and account for 6.5% of the total persons.

The largest 5 year age group in 2036 is 30 to 34 years, with a total of 1,032 persons.

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