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Willoughby City CouncilPopulation forecast

Chatswood (Balance - West)

Population and age structure

Between 2021 and 2026, the age structure forecasts for Chatswood (Balance - West) indicate a 3.1% increase in population under working age, a 18.2% increase in population of retirement age, and a 0.1% 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 Willoughby City 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
Chatswood (Balance - West) - Total persons202120262036Change between 2021 and 2036
Age group (years)Number%Number%Number%Number
0 to 43584.64115.13494.4-8
5 to 94575.94395.54225.3-34
10 to 145016.45076.34816.0-19
15 to 194215.45406.75066.3+85
20 to 245076.54896.15336.7+25
25 to 295276.84846.04766.0-51
30 to 345166.64535.64015.0-115
35 to 396648.55076.34345.4-229
40 to 446348.26027.54635.8-171
45 to 496087.86397.95206.5-87
50 to 545186.75987.45807.3+62
55 to 595076.55206.55807.3+73
60 to 644165.34896.15346.7+118
65 to 694135.34265.34806.0+67
70 to 743334.33834.84365.5+103
75 to 791952.52833.53314.2+136
80 to 841041.31592.02553.2+150
85 and over1051.31081.31892.4+84
Total persons7,783100.08,038100.07,970100.0+187
Source: Population and household forecasts, 2021 to 2036, prepared by .id (informed decisions), January 2023.

Key findings

In 2021, the dominant age structure for persons in Chatswood (Balance - West) was ages 35 to 39, which accounted for 8.5% of the total persons.

The largest increase in persons between 2021 and 2026 is forecast to be in ages 15 to 19, which is expected to increase by 119 and account for 6.7% of the total persons.

The largest 5 year age group in 2026 is 45 to 49 years, with a total of 639 persons.

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