Northern Beaches CouncilPopulation forecast
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Seaforth

Population and age structure

Between 2016 and 2026, the age structure category with the greatest increase in persons in Seaforth is 'Seniors (70 to 84)'.

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 - Service age groups
Seaforth - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
Babies and pre-schoolers (0 to 4)5527.35397.25687.4+16
Primary schoolers (5 to 11)1,03513.780910.887011.3-165
Secondary schoolers (12 to 17)6899.16989.36798.8-10
Tertiary education and independence (18 to 24)6578.76538.75987.8-59
Young workforce (25 to 34)4475.95597.45877.6+140
Parents and homebuilders (35 to 49)1,82524.21,58921.21,70722.1-118
Older workers and pre-retirees (50 to 59)1,07714.31,04814.093112.1-146
Empty nesters and retirees (60 to 69)6528.676110.17539.8+101
Seniors (70 to 84)4726.36869.179510.3+323
Elderly aged (85 and over)1361.81642.22242.9+88
Total persons7,542100.07,506100.07,713100.0+171

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

Forecast age structure - Service age groups
Forecast age structure - Service age groups Forecast persons aged 85+,  2036: 224 Forecast persons aged 70-84,  2036: 795 Forecast persons aged 60-69,  2036: 753 Forecast persons aged 50-59,  2036: 931 Forecast persons aged 35-49,  2036: 1,707 Forecast persons aged 25-34,  2036: 587 Forecast persons aged 18-24,  2036: 598 Forecast persons aged 12-17,  2036: 679 Forecast persons aged 5-11,  2036: 870 Forecast persons aged 0-4,  2036: 568 Forecast persons aged 85+,  2026: 164 Forecast persons aged 70-84,  2026: 686 Forecast persons aged 60-69,  2026: 761 Forecast persons aged 50-59,  2026: 1,048 Forecast persons aged 35-49,  2026: 1,589 Forecast persons aged 25-34,  2026: 559 Forecast persons aged 18-24,  2026: 653 Forecast persons aged 12-17,  2026: 698 Forecast persons aged 5-11,  2026: 809 Forecast persons aged 0-4,  2026: 539 Forecast persons aged 85+,  2016: 136 Forecast persons aged 70-84,  2016: 472 Forecast persons aged 60-69,  2016: 652 Forecast persons aged 50-59,  2016: 1,077 Forecast persons aged 35-49,  2016: 1,825 Forecast persons aged 25-34,  2016: 447 Forecast persons aged 18-24,  2016: 657 Forecast persons aged 12-17,  2016: 689 Forecast persons aged 5-11,  2016: 1,035 Forecast persons aged 0-4,  2016: 552
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, November 2017.
Forecast change in age structure - Service age groups
Forecast change in age structure - Service age groups Forecast persons aged 85+,  2026 to 2036: 60 Forecast persons aged 70-84,  2026 to 2036: 110 Forecast persons aged 60-69,  2026 to 2036: -7 Forecast persons aged 50-59,  2026 to 2036: -117 Forecast persons aged 35-49,  2026 to 2036: 118 Forecast persons aged 25-34,  2026 to 2036: 28 Forecast persons aged 18-24,  2026 to 2036: -55 Forecast persons aged 12-17,  2026 to 2036: -19 Forecast persons aged 5-11,  2026 to 2036: 61 Forecast persons aged 0-4,  2026 to 2036: 30 Forecast persons aged 85+,  2016 to 2026: 28 Forecast persons aged 70-84,  2016 to 2026: 214 Forecast persons aged 60-69,  2016 to 2026: 109 Forecast persons aged 50-59,  2016 to 2026: -29 Forecast persons aged 35-49,  2016 to 2026: -236 Forecast persons aged 25-34,  2016 to 2026: 112 Forecast persons aged 18-24,  2016 to 2026: -4 Forecast persons aged 12-17,  2016 to 2026: 9 Forecast persons aged 5-11,  2016 to 2026: -226 Forecast persons aged 0-4,  2016 to 2026: -13
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, November 2017.

Key findings

In Seaforth between 2016 and 2026, the number of persons aged under 17 is forecast to decrease by 230 (10.1%), and will comprise 27.3% of the total population.

The number of persons aged over 60 is expected to increase by 351 (27.9%) and comprise 21.5% of the total population.

The largest service age group in 2026 is 'Parents and homebuilders (35 to 49)', with a total of 1,589 persons.

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