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City of CaseyPopulation forecast

Casey Growth Areas

Population and age structure

Between 2021 and 2036, the age structure forecasts for Casey Growth Areas indicate a 100.9% increase in population under working age, a 243.5% increase in population of retirement age, and a 136.6% 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
Casey Growth Areas - Total persons202120362046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 410,40311.217,6678.118,5387.7+8,135
5 to 99,1769.817,7828.219,0367.9+9,860
10 to 146,5817.117,1187.918,3107.6+11,729
15 to 194,8615.215,2967.016,5376.8+11,676
20 to 245,6586.113,4926.214,3285.9+8,670
25 to 298,3058.914,9946.915,1666.3+6,861
30 to 3410,52811.318,3828.518,8247.8+8,295
35 to 3910,92811.720,0029.220,4958.5+9,568
40 to 447,1677.718,3208.418,5227.7+11,355
45 to 494,9935.415,5807.216,5126.8+11,519
50 to 543,7384.012,6765.814,7946.1+11,056
55 to 592,8763.19,3604.312,5705.2+9,694
60 to 642,2982.57,0363.210,1894.2+7,891
65 to 691,7771.95,5132.57,8443.2+6,067
70 to 741,5871.74,6292.16,4792.7+4,892
75 to 791,1171.23,8661.85,5062.3+4,389
80 to 846800.72,7911.34,2871.8+3,607
85 and over5230.62,7241.34,1101.7+3,586
Total persons93,196100.0217,230100.0242,045100.0+148,849
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 Casey Growth Areas was ages 35 to 39, which accounted for 11.7% of the total persons.

The largest increase in persons between 2021 and 2036 is forecast to be in ages 40 to 44, which is expected to increase by 11,153 and account for 8.4% of the total persons.

The largest 5 year age group in 2036 is 35 to 39 years, with a total of 20,002 persons.

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