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City of KnoxPopulation forecast

City of Knox

Population and age structure

Between 2021 and 2031, the age structure forecasts for City of Knox indicate a 3.6% decrease in population under working age, a 14.9% increase in population of retirement age, and a 5.7% 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 Knox 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
City of Knox - Total persons202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 48,7385.48,4575.09,3204.9+582
5 to 99,5576.08,8395.29,9295.2+372
10 to 149,4845.99,4875.610,5145.6+1,030
15 to 199,4285.910,1266.010,9625.8+1,534
20 to 249,8946.210,4706.211,4506.0+1,556
25 to 299,7526.110,6306.311,7716.2+2,019
30 to 3410,9926.811,7576.913,0026.9+2,009
35 to 3911,5777.212,4397.314,0117.4+2,434
40 to 4410,9016.812,3337.314,0487.4+3,146
45 to 4910,7536.711,8917.013,6597.2+2,906
50 to 5410,8706.810,9736.512,7956.8+1,925
55 to 5910,6586.610,3096.111,8716.3+1,214
60 to 649,8836.29,7175.710,7345.7+851
65 to 698,5035.38,7995.29,3104.9+807
70 to 747,2674.57,6734.58,0434.2+777
75 to 795,0553.16,4053.87,0013.7+1,946
80 to 843,6812.35,0453.05,7213.0+2,040
85 and over3,4922.24,2362.55,2142.8+1,723
Total persons160,485100.0169,585100.0189,356100.0+28,871
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), June 2023.

Key findings

In 2021, the dominant age structure for persons in City of Knox was ages 35 to 39, which accounted for 7.2% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 40 to 44, which is expected to increase by 1,431 and account for 7.3% of the total persons.

The largest 5 year age group in 2031 is 35 to 39 years, with a total of 12,439 persons.

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