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Wollondilly Shire CouncilPopulation forecast

Wollondilly Shire Council

Population and age structure

Between 2021 and 2031, the age structure forecasts for Wollondilly Shire Council indicate a 39.0% increase in females under working age, a 48.0% increase in females of retirement age, and a 37.3% 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 Wollondilly Shire Council 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
Wollondilly Shire Council - Total females202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 41,8456.92,5986.93,2346.6+1,389
5 to 91,8827.02,7017.23,5297.2+1,647
10 to 142,0097.52,6747.13,5167.1+1,507
15 to 191,7996.72,3906.43,1926.5+1,394
20 to 241,5525.81,9565.22,4815.0+928
25 to 291,6046.02,2416.02,6845.5+1,079
30 to 341,7446.52,7917.43,4657.0+1,721
35 to 391,8176.72,9577.93,8987.9+2,081
40 to 441,7096.32,8027.53,8897.9+2,180
45 to 491,9187.12,4996.73,6267.4+1,709
50 to 541,7176.42,0225.42,9586.0+1,241
55 to 591,6626.21,9845.32,5185.1+857
60 to 641,5525.81,8034.82,2124.5+660
65 to 691,3294.91,7064.52,1534.4+824
70 to 741,1504.31,4974.01,8903.8+740
75 to 797142.71,1863.21,5993.2+885
80 to 844921.88982.41,2482.5+756
85 and over4371.68122.21,1102.3+674
Total persons26,932100.037,517100.049,202100.0+22,270
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), February 2023.

Key findings

In 2021, the dominant age structure for females in Wollondilly Shire Council was ages 10 to 14, which accounted for 7.5% 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 1,139 and account for 7.9% of the total females.

The largest female 5 year age group in 2031 is 35 to 39 years, with a total of 2,957 females.

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