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Bayside CouncilPopulation forecast


Population and age structure

Between 2016 and 2026, the age structure forecasts for Rockdale indicate a 50.4% increase in population under working age, a 46.5% increase in population of retirement age, and a 31.0% 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 Rockdale 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
Rockdale - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 49886.21,4846.81,4636.5+475
5 to 96424.09844.51,0564.7+414
10 to 144953.17273.38623.8+367
15 to 196494.09504.41,0204.5+371
20 to 241,5959.92,25610.42,1399.4+544
25 to 292,58916.13,23114.92,97013.1+381
30 to 342,23913.92,67912.32,56211.3+323
35 to 391,3488.41,9248.91,9578.6+609
40 to 449265.81,4226.51,4746.5+548
45 to 497924.91,0664.91,2545.5+462
50 to 548015.09424.31,1735.2+372
55 to 597314.58784.09934.4+262
60 to 646354.07763.68323.7+197
65 to 695253.36663.17353.2+211
70 to 743562.25932.76873.0+331
75 to 792781.74822.25982.6+320
80 to 842201.43221.54702.1+250
85 and over2571.63341.54001.8+142
Total persons16,064100.021,716100.022,646100.0+6,582
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 Rockdale was ages 25 to 29, which accounted for 16.1% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 20 to 24, which is expected to increase by 662 and account for 10.4% of the total persons.

The largest 5 year age group in 2026 is 25 to 29 years, with a total of 3,231 persons.

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