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City of MeltonPopulation forecast


Population and age structure

Between 2016 and 2031, the age structure forecasts for Rockbank indicate a 1989.9% increase in population under working age, a 646.2% increase in population of retirement age, and a 890.5% 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 Rockbank 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 persons201620312051Change between 2016 and 2051
Age group (years)Number%Number%Number%Number
0 to 4423.91,1309.32,0939.0+2,050
5 to 9615.71,22810.21,6477.1+1,586
10 to 14555.19447.81,9108.2+1,855
15 to 19484.47296.01,7727.6+1,724
20 to 24837.77436.11,4116.1+1,328
25 to 29857.91,0298.51,3675.9+1,282
30 to 34777.11,25910.41,6447.1+1,567
35 to 39635.81,1709.71,8297.9+1,767
40 to 44908.38507.01,7827.7+1,692
45 to 49847.85974.91,6287.0+1,543
50 to 54938.65234.31,4146.1+1,321
55 to 59787.24814.01,2065.2+1,128
60 to 64878.14243.51,0114.4+923
65 to 69656.03332.88243.5+759
70 to 74343.22392.06492.8+615
75 to 79232.11881.65172.2+494
80 to 8470.61171.02781.2+272
85 and over30.31080.92431.0+240
Total persons1,077100.012,092100.023,224100.0+22,147
Population and household forecasts, 2016 to 2051, prepared by .id , the population experts, June 2020.

Key findings

In 2016, the dominant age structure for persons in Rockbank was ages 50 to 54, which accounted for 8.6% of the total persons.

The largest increase in persons between 2016 and 2031 is forecast to be in ages 30 to 34, which is expected to increase by 1,183 and account for 10.4% of the total persons.

The largest 5 year age group in 2031 is 30 to 34 years, with a total of 1,259 persons.

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