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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 36.0% increase in males under working age, a 33.8% increase in males of retirement age, and a 38.9% increase in males 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 males202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 42,0097.42,7327.33,3986.9+1,388
5 to 92,0937.72,9007.73,7667.7+1,672
10 to 142,1057.72,8097.53,6547.4+1,550
15 to 191,9607.22,5596.83,3296.8+1,368
20 to 241,7506.42,3286.22,9596.0+1,209
25 to 291,5515.72,2806.12,8115.7+1,261
30 to 341,7456.42,7167.23,4156.9+1,669
35 to 391,7606.42,8237.53,7467.6+1,986
40 to 441,6175.92,5666.83,5117.1+1,895
45 to 491,8666.82,3886.43,3576.8+1,492
50 to 541,8196.72,2255.93,1626.4+1,343
55 to 591,5565.72,1355.72,8065.7+1,250
60 to 641,5135.51,7814.72,2864.6+772
65 to 691,3134.81,4974.02,0384.1+725
70 to 741,1204.11,3503.61,7253.5+605
75 to 797502.71,0822.91,3862.8+636
80 to 844511.77932.11,0712.2+620
85 and over3171.25641.57791.6+462
Total persons27,296100.037,528100.049,199100.0+21,903
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), February 2023.

Key findings

In 2021, the dominant age structure for males in Wollondilly Shire Council was ages 10 to 14, which accounted for 7.7% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 35 to 39, which is expected to increase by 1,062 and account for 7.5% of the total males.

The largest male 5 year age group in 2031 is 5 to 9 years, with a total of 2,900 males.

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