Willoughby City CouncilPopulation forecast
Skip to content

Willoughby City

Population and age structure

Between 2011 and 2026, the age structure forecasts for Willoughby City indicate a 11.2% increase in population under working age, a 47.8% increase in population of retirement age, and a 13.5% 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 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 - Total persons201120262036Change between 2011 and 2036
Age group (years)Number%Number%Number%Number
0 to 4 5,0457.15,1806.25,4146.1+370
5 to 9 4,3756.24,9435.95,1465.8+771
10 to 14 3,7695.34,5425.44,7245.3+955
15 to 19 3,6945.25,1706.25,1875.8+1,493
20 to 24 4,7826.75,6816.85,9786.7+1,196
25 to 29 5,6207.96,2067.46,6897.5+1,069
30 to 34 6,1188.66,5347.86,9947.8+876
35 to 39 6,0958.66,5837.96,9257.8+830
40 to 44 5,6968.06,2937.56,5487.3+852
45 to 49 5,0687.15,7536.96,0356.8+967
50 to 54 4,3926.25,0696.15,3366.0+944
55 to 59 3,8865.54,4045.34,6605.2+774
60 to 64 3,6275.13,8864.74,1924.7+565
65 to 69 2,5113.53,4314.13,7434.2+1,232
70 to 74 1,9562.83,0613.73,3583.8+1,402
75 to 79 1,5792.22,7103.22,9843.3+1,406
80 to 84 1,3791.91,8912.32,5182.8+1,138
85 and over1,5472.22,1682.62,8393.2+1,293
Total persons71,139100.083,507100.089,271100.0+18,132

Population and household forecasts, 2011 to 2036, prepared by .id , the population experts, July 2015.

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2036: 2,839 Forecast persons aged 80-84,  2036: 2,518 Forecast persons aged 75-79,  2036: 2,984 Forecast persons aged 70-74,  2036: 3,358 Forecast persons aged 65-69,  2036: 3,743 Forecast persons aged 60-64,  2036: 4,192 Forecast persons aged 55-59,  2036: 4,660 Forecast persons aged 50-54,  2036: 5,336 Forecast persons aged 45-49,  2036: 6,035 Forecast persons aged 40-44,  2036: 6,548 Forecast persons aged 35-39,  2036: 6,925 Forecast persons aged 30-34,  2036: 6,994 Forecast persons aged 25-29,  2036: 6,689 Forecast persons aged 20-24,  2036: 5,978 Forecast persons aged 15-19,  2036: 5,187 Forecast persons aged 10-14,  2036: 4,724 Forecast persons aged 5-9,  2036: 5,146 Forecast persons aged 0-4,  2036: 5,414 Forecast persons aged 85+,  2026: 2,168 Forecast persons aged 80-84,  2026: 1,891 Forecast persons aged 75-79,  2026: 2,710 Forecast persons aged 70-74,  2026: 3,061 Forecast persons aged 65-69,  2026: 3,431 Forecast persons aged 60-64,  2026: 3,886 Forecast persons aged 55-59,  2026: 4,404 Forecast persons aged 50-54,  2026: 5,069 Forecast persons aged 45-49,  2026: 5,753 Forecast persons aged 40-44,  2026: 6,293 Forecast persons aged 35-39,  2026: 6,583 Forecast persons aged 30-34,  2026: 6,534 Forecast persons aged 25-29,  2026: 6,206 Forecast persons aged 20-24,  2026: 5,681 Forecast persons aged 15-19,  2026: 5,170 Forecast persons aged 10-14,  2026: 4,542 Forecast persons aged 5-9,  2026: 4,943 Forecast persons aged 0-4,  2026: 5,180 Forecast persons aged 85+,  2011: 1,547 Forecast persons aged 80-84,  2011: 1,379 Forecast persons aged 75-79,  2011: 1,579 Forecast persons aged 70-74,  2011: 1,956 Forecast persons aged 65-69,  2011: 2,511 Forecast persons aged 60-64,  2011: 3,627 Forecast persons aged 55-59,  2011: 3,886 Forecast persons aged 50-54,  2011: 4,392 Forecast persons aged 45-49,  2011: 5,068 Forecast persons aged 40-44,  2011: 5,696 Forecast persons aged 35-39,  2011: 6,095 Forecast persons aged 30-34,  2011: 6,118 Forecast persons aged 25-29,  2011: 5,620 Forecast persons aged 20-24,  2011: 4,782 Forecast persons aged 15-19,  2011: 3,694 Forecast persons aged 10-14,  2011: 3,769 Forecast persons aged 5-9,  2011: 4,375 Forecast persons aged 0-4,  2011: 5,045
Population and household forecasts, 2011 to 2036, prepared by .id the population experts, July 2015.
Forecast change in age structure - 5 year age groups
Forecast change in age structure - 5 year age groups Forecast persons aged 85+,  2026 to 2036: 672 Forecast persons aged 80-84,  2026 to 2036: 627 Forecast persons aged 75-79,  2026 to 2036: 274 Forecast persons aged 70-74,  2026 to 2036: 297 Forecast persons aged 65-69,  2026 to 2036: 312 Forecast persons aged 60-64,  2026 to 2036: 306 Forecast persons aged 55-59,  2026 to 2036: 256 Forecast persons aged 50-54,  2026 to 2036: 267 Forecast persons aged 45-49,  2026 to 2036: 282 Forecast persons aged 40-44,  2026 to 2036: 254 Forecast persons aged 35-39,  2026 to 2036: 342 Forecast persons aged 30-34,  2026 to 2036: 460 Forecast persons aged 25-29,  2026 to 2036: 484 Forecast persons aged 20-24,  2026 to 2036: 297 Forecast persons aged 15-19,  2026 to 2036: 17 Forecast persons aged 10-14,  2026 to 2036: 182 Forecast persons aged 5-9,  2026 to 2036: 203 Forecast persons aged 0-4,  2026 to 2036: 234 Forecast persons aged 85+,  2011 to 2026: 621 Forecast persons aged 80-84,  2011 to 2026: 512 Forecast persons aged 75-79,  2011 to 2026: 1,132 Forecast persons aged 70-74,  2011 to 2026: 1,105 Forecast persons aged 65-69,  2011 to 2026: 920 Forecast persons aged 60-64,  2011 to 2026: 259 Forecast persons aged 55-59,  2011 to 2026: 518 Forecast persons aged 50-54,  2011 to 2026: 677 Forecast persons aged 45-49,  2011 to 2026: 685 Forecast persons aged 40-44,  2011 to 2026: 597 Forecast persons aged 35-39,  2011 to 2026: 488 Forecast persons aged 30-34,  2011 to 2026: 416 Forecast persons aged 25-29,  2011 to 2026: 586 Forecast persons aged 20-24,  2011 to 2026: 899 Forecast persons aged 15-19,  2011 to 2026: 1,477 Forecast persons aged 10-14,  2011 to 2026: 773 Forecast persons aged 5-9,  2011 to 2026: 568 Forecast persons aged 0-4,  2011 to 2026: 136
Population and household forecasts, 2011 to 2036, prepared by .id the population experts, July 2015.

Key findings

In 2011, the dominant age structure for persons in Willoughby City was ages 30 to 34 , which accounted for 8.6% of the total persons.

The largest increase in persons between 2011 and 2026 is forecast to be in ages 15 to 19 , which is expected to increase by 1,477 and account for 6.2% of the total persons.

The largest 5 year age group in 2026 is 35 to 39 years, with a total of 6,583 persons.

v17.10.06-1.0.0