Northern Beaches CouncilPopulation forecast
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Dee Why

Population and age structure

Between 2016 and 2026, the age structure forecasts for Dee Why indicate a 13.9% increase in population under working age, a 50.0% increase in population of retirement age, and a 9.8% 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 area 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
Dee Why - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 41,6987.51,6936.51,6655.9-33
5 to 91,0994.81,3005.01,2494.5+149
10 to 148143.61,1194.31,0963.9+282
15 to 199314.11,0744.11,1384.1+208
20 to 241,4116.21,5225.81,6355.8+225
25 to 292,29810.12,3408.92,3538.4+55
30 to 342,69211.82,5079.62,4658.8-228
35 to 392,28810.02,1708.32,1177.5-171
40 to 441,7527.72,0137.71,9126.8+160
45 to 491,5746.91,9607.51,8666.7+292
50 to 541,3886.11,7336.61,8716.7+483
55 to 591,2545.51,5535.91,8266.5+572
60 to 641,0594.61,4105.41,6505.9+591
65 to 697693.41,2374.71,4815.3+712
70 to 745902.69943.81,3184.7+728
75 to 794662.07172.71,1334.0+667
80 to 843571.64871.98012.9+444
85 and over3381.53441.34661.7+129
Total persons22,778100.026,172100.028,042100.0+5,264

Population and household forecasts, 2016 to 2036, prepared by .id , the population experts, November 2017.

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2036: 466 Forecast persons aged 80-84,  2036: 801 Forecast persons aged 75-79,  2036: 1,133 Forecast persons aged 70-74,  2036: 1,318 Forecast persons aged 65-69,  2036: 1,481 Forecast persons aged 60-64,  2036: 1,650 Forecast persons aged 55-59,  2036: 1,826 Forecast persons aged 50-54,  2036: 1,871 Forecast persons aged 45-49,  2036: 1,866 Forecast persons aged 40-44,  2036: 1,912 Forecast persons aged 35-39,  2036: 2,117 Forecast persons aged 30-34,  2036: 2,465 Forecast persons aged 25-29,  2036: 2,353 Forecast persons aged 20-24,  2036: 1,635 Forecast persons aged 15-19,  2036: 1,138 Forecast persons aged 10-14,  2036: 1,096 Forecast persons aged 5-9,  2036: 1,249 Forecast persons aged 0-4,  2036: 1,665 Forecast persons aged 85+,  2026: 344 Forecast persons aged 80-84,  2026: 487 Forecast persons aged 75-79,  2026: 717 Forecast persons aged 70-74,  2026: 994 Forecast persons aged 65-69,  2026: 1,237 Forecast persons aged 60-64,  2026: 1,410 Forecast persons aged 55-59,  2026: 1,553 Forecast persons aged 50-54,  2026: 1,733 Forecast persons aged 45-49,  2026: 1,960 Forecast persons aged 40-44,  2026: 2,013 Forecast persons aged 35-39,  2026: 2,170 Forecast persons aged 30-34,  2026: 2,507 Forecast persons aged 25-29,  2026: 2,340 Forecast persons aged 20-24,  2026: 1,522 Forecast persons aged 15-19,  2026: 1,074 Forecast persons aged 10-14,  2026: 1,119 Forecast persons aged 5-9,  2026: 1,300 Forecast persons aged 0-4,  2026: 1,693 Forecast persons aged 85+,  2016: 338 Forecast persons aged 80-84,  2016: 357 Forecast persons aged 75-79,  2016: 466 Forecast persons aged 70-74,  2016: 590 Forecast persons aged 65-69,  2016: 769 Forecast persons aged 60-64,  2016: 1,059 Forecast persons aged 55-59,  2016: 1,254 Forecast persons aged 50-54,  2016: 1,388 Forecast persons aged 45-49,  2016: 1,574 Forecast persons aged 40-44,  2016: 1,752 Forecast persons aged 35-39,  2016: 2,288 Forecast persons aged 30-34,  2016: 2,692 Forecast persons aged 25-29,  2016: 2,298 Forecast persons aged 20-24,  2016: 1,411 Forecast persons aged 15-19,  2016: 931 Forecast persons aged 10-14,  2016: 814 Forecast persons aged 5-9,  2016: 1,099 Forecast persons aged 0-4,  2016: 1,698
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, November 2017.
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: 122 Forecast persons aged 80-84,  2026 to 2036: 314 Forecast persons aged 75-79,  2026 to 2036: 416 Forecast persons aged 70-74,  2026 to 2036: 324 Forecast persons aged 65-69,  2026 to 2036: 244 Forecast persons aged 60-64,  2026 to 2036: 240 Forecast persons aged 55-59,  2026 to 2036: 273 Forecast persons aged 50-54,  2026 to 2036: 138 Forecast persons aged 45-49,  2026 to 2036: -94 Forecast persons aged 40-44,  2026 to 2036: -101 Forecast persons aged 35-39,  2026 to 2036: -53 Forecast persons aged 30-34,  2026 to 2036: -43 Forecast persons aged 25-29,  2026 to 2036: 13 Forecast persons aged 20-24,  2026 to 2036: 114 Forecast persons aged 15-19,  2026 to 2036: 65 Forecast persons aged 10-14,  2026 to 2036: -23 Forecast persons aged 5-9,  2026 to 2036: -52 Forecast persons aged 0-4,  2026 to 2036: -28 Forecast persons aged 85+,  2016 to 2026: 7 Forecast persons aged 80-84,  2016 to 2026: 129 Forecast persons aged 75-79,  2016 to 2026: 252 Forecast persons aged 70-74,  2016 to 2026: 404 Forecast persons aged 65-69,  2016 to 2026: 468 Forecast persons aged 60-64,  2016 to 2026: 351 Forecast persons aged 55-59,  2016 to 2026: 299 Forecast persons aged 50-54,  2016 to 2026: 346 Forecast persons aged 45-49,  2016 to 2026: 386 Forecast persons aged 40-44,  2016 to 2026: 261 Forecast persons aged 35-39,  2016 to 2026: -118 Forecast persons aged 30-34,  2016 to 2026: -185 Forecast persons aged 25-29,  2016 to 2026: 41 Forecast persons aged 20-24,  2016 to 2026: 111 Forecast persons aged 15-19,  2016 to 2026: 143 Forecast persons aged 10-14,  2016 to 2026: 305 Forecast persons aged 5-9,  2016 to 2026: 201 Forecast persons aged 0-4,  2016 to 2026: -5
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, November 2017.

Key findings

In 2016, the dominant age structure for persons in Dee Why was ages 30 to 34, which accounted for 11.8% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 65 to 69, which is expected to increase by 468 and account for 4.7% of the total persons.

The largest 5 year age group in 2026 is 30 to 34 years, with a total of 2,507 persons.

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