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City of CaseyPopulation forecast

Narre Warren South

Population and age structure

Between 2021 and 2036, the age structure forecasts for Narre Warren South indicate a 2.6% decrease in population under working age, a 72.4% increase in population of retirement age, and a 3.9% decrease 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
Narre Warren South - Total persons202120362046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 41,9306.22,0676.42,1006.3+170
5 to 92,2827.32,2557.02,2966.9+14
10 to 142,7638.82,4737.72,5237.6-240
15 to 192,7598.82,5357.92,6097.8-149
20 to 242,5458.12,3927.42,4397.3-106
25 to 291,9696.32,0016.22,0226.1+53
30 to 341,8225.81,9586.11,9976.0+175
35 to 392,0726.62,1166.62,1616.5+89
40 to 442,2387.22,1336.62,1826.6-56
45 to 492,4627.92,0836.52,1456.4-317
50 to 542,3567.52,0046.22,0426.1-314
55 to 591,8846.01,8405.71,8235.5-61
60 to 641,4674.71,6605.21,5424.6+75
65 to 691,0083.21,4164.41,3204.0+313
70 to 747312.31,1103.51,2183.7+488
75 to 794951.69062.81,1193.4+624
80 to 842670.96352.08862.7+619
85 and over1880.65681.88542.6+667
Total persons31,236100.032,152100.033,279100.0+2,043
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 Narre Warren South was ages 10 to 14, which accounted for 8.8% of the total persons.

The largest increase in persons between 2021 and 2036 is forecast to be in ages 75 to 79, which is expected to increase by 411 and account for 2.8% of the total persons.

The largest 5 year age group in 2036 is 15 to 19 years, with a total of 2,535 persons.

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