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City of MeltonPopulation forecast

Rockbank

Population and age structure

Between 2021 and 2031, the age structure forecasts for Rockbank indicate a 443.5% increase in population under working age, a 330.6% increase in population of retirement age, and a 360.2% 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 City of Melton 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
Rockbank - Total persons202120312051Change between 2021 and 2051
Age group (years)Number%Number%Number%Number
0 to 426910.21,29510.41,5657.5+1,296
5 to 91927.31,0948.81,5697.5+1,377
10 to 141023.96715.41,3676.5+1,265
15 to 19903.44944.01,2085.8+1,118
20 to 241847.08166.51,1785.6+994
25 to 2930511.61,2339.91,3646.5+1,059
30 to 3437814.41,61913.01,7988.6+1,419
35 to 3928010.71,45611.71,9129.2+1,632
40 to 441365.29707.81,7468.4+1,610
45 to 491294.96715.41,5777.6+1,448
50 to 541425.45364.31,3666.5+1,224
55 to 591003.84213.41,0955.2+994
60 to 641244.73803.09094.4+785
65 to 69742.82912.37033.4+629
70 to 74893.42201.85582.7+469
75 to 79200.81421.14342.1+414
80 to 8480.31170.93141.5+306
85 and over20.1610.52251.1+223
Total persons2,626100.012,484100.020,887100.0+18,261
Source: Population and household forecasts, 2021 to 2051, prepared by .id (informed decisions), June 2023.

Key findings

In 2021, the dominant age structure for persons in Rockbank was ages 30 to 34, which accounted for 14.4% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 30 to 34, which is expected to increase by 1,240 and account for 13.0% of the total persons.

The largest 5 year age group in 2031 is 30 to 34 years, with a total of 1,619 persons.

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