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Northern Beaches CouncilPopulation forecast

Northern Beaches Council

Population and age structure

Between 2021 and 2031, the age structure forecasts for Northern Beaches Council indicate a 6.1% increase in population under working age, a 22.0% increase in population of retirement age, and a 7.3% 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 the Northern Beaches 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
Northern Beaches Council - Total persons202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 414,4735.517,1365.918,0715.9+3,599
5 to 916,4756.217,5216.018,4166.0+1,942
10 to 1418,5027.017,8106.119,1226.2+620
15 to 1916,3096.217,5976.118,4296.0+2,120
20 to 2413,9595.316,7645.816,8365.5+2,877
25 to 2913,6455.216,2305.616,9945.5+3,349
30 to 3415,9516.017,2986.018,3615.9+2,410
35 to 3917,3116.518,1166.219,1156.2+1,804
40 to 4418,4637.019,1446.619,9346.5+1,470
45 to 4920,5837.819,6176.820,4066.6-177
50 to 5419,3627.319,2136.619,9976.5+635
55 to 5917,5116.619,1216.618,8986.1+1,387
60 to 6414,8195.617,0875.917,3205.6+2,501
65 to 6912,3054.714,9825.216,3515.3+4,046
70 to 7411,5374.412,9804.515,0494.9+3,512
75 to 799,4923.610,9493.813,4554.4+3,962
80 to 846,6552.59,0783.110,6573.5+4,002
85 and over7,1532.79,5033.311,2053.6+4,053
Total persons264,504100.0290,146100.0308,616100.0+44,112
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), August 2023.

Key findings

In 2021, the dominant age structure for persons in Northern Beaches Council was ages 45 to 49, which accounted for 7.8% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 20 to 24, which is expected to increase by 2,805 and account for 5.8% of the total persons.

The largest 5 year age group in 2031 is 45 to 49 years, with a total of 19,617 persons.

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