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Willoughby City CouncilPopulation forecast

Willoughby City Council

Population and age structure

Between 2016 and 2026, the age structure forecasts for Willoughby City Council indicate a 0.9% increase in population under working age, a 27.8% increase in population of retirement age, and a 10.1% 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
Willoughby City Council - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 45,2876.85,3416.25,5636.1+276
5 to 95,4597.05,1195.95,2625.7-197
10 to 144,3735.64,7905.54,8365.3+462
15 to 194,2025.45,4536.35,3195.8+1,117
20 to 244,8856.35,8966.86,2086.8+1,323
25 to 295,6667.36,3297.36,9277.5+1,261
30 to 346,6048.56,7057.87,2097.8+605
35 to 396,6008.56,7337.87,0857.7+485
40 to 446,1787.96,5737.66,6927.3+515
45 to 495,4587.06,0377.06,1646.7+706
50 to 544,8576.25,2946.15,5326.0+675
55 to 594,1885.44,5265.24,8475.3+659
60 to 643,6824.74,0814.74,3594.7+677
65 to 693,3874.33,5944.23,8474.2+460
70 to 742,3213.03,1313.63,4993.8+1,179
75 to 791,7112.22,7963.23,0993.4+1,388
80 to 841,3701.81,9132.22,5672.8+1,197
85 and over1,7902.32,0882.42,8333.1+1,043
Total persons78,018100.086,399100.091,848100.0+13,830
Source: Population and household forecasts, 2016 to 2036, prepared by .id (informed decisions), November 2017.

Key findings

In 2016, the dominant age structure for persons in Willoughby City Council was ages 30 to 34, which accounted for 8.5% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 15 to 19, which is expected to increase by 1,251 and account for 6.3% of the total persons.

The largest 5 year age group in 2026 is 35 to 39 years, with a total of 6,733 persons.

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