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Northern Beaches CouncilPopulation forecast

Northern Beaches Council

Population and age structure

Between 2016 and 2031, the age structure forecasts for Northern Beaches Council indicate a 2.4% increase in population under working age, a 29.9% increase in population of retirement age, and a 8.4% 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 persons201620312041Change between 2016 and 2041
Age group (years)Number%Number%Number%Number
0 to 417,0736.417,5366.018,4195.9+1,346
5 to 918,7267.118,1796.219,1046.1+378
10 to 1416,5876.217,9506.118,8086.0+2,221
15 to 1914,9575.616,9185.817,5495.6+2,592
20 to 2414,0345.315,8895.416,4055.2+2,371
25 to 2915,4245.816,6655.717,5345.6+2,110
30 to 3417,5736.618,7176.419,7786.3+2,205
35 to 3918,8107.120,2566.921,4386.9+2,628
40 to 4421,0687.921,4487.322,6967.3+1,628
45 to 4919,9787.520,9287.122,0187.0+2,040
50 to 5418,3786.919,3736.620,3786.5+2,000
55 to 5915,8966.017,8626.118,4765.9+2,580
60 to 6413,5335.115,8325.416,4455.3+2,912
65 to 6912,6614.814,3604.915,2464.9+2,585
70 to 7410,5464.012,7794.314,0924.5+3,546
75 to 797,7572.910,9453.712,6444.0+4,887
80 to 845,4712.18,8723.010,3373.3+4,866
85 and over6,9962.69,4453.211,1373.6+4,141
Total persons265,468100.0293,952100.0312,503100.0+47,035
Source: Population and household forecasts, 2016 to 2041, prepared by .id (informed decisions), December 2020.

Key findings

In 2016, the dominant age structure for persons in Northern Beaches Council was ages 40 to 44, which accounted for 7.9% of the total persons.

The largest increase in persons between 2016 and 2031 is forecast to be in ages 80 to 84, which is expected to increase by 3,401 and account for 3.0% of the total persons.

The largest 5 year age group in 2031 is 40 to 44 years, with a total of 21,448 persons.

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