City of KwinanaPopulation forecast
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Mortimer District

Population and age structure

Between 2016 and 2026, the age structure forecasts for Mortimer District indicate a 195.2% increase in population under working age, a 145.1% increase in population of retirement age, and a 58.5% 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 the City of Kwinana 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
Mortimer District - Total persons201620262036Change between 2016 and 2036
Age group (years)Number%Number%Number%Number
0 to 41795.55309.01,43010.1+1,251
5 to 91284.04748.11,2218.7+1,093
10 to 141524.73516.08335.9+681
15 to 191745.43235.57635.4+589
20 to 2441813.04898.31,1938.5+775
25 to 2943913.661210.41,63011.6+1,191
30 to 3437111.568511.71,66611.8+1,295
35 to 392628.15619.51,2899.1+1,027
40 to 442598.04307.39476.7+688
45 to 492206.83305.67605.4+540
50 to 541966.12694.65634.0+367
55 to 591645.12394.14573.2+293
60 to 641023.21903.23512.5+249
65 to 69702.21502.62892.1+219
70 to 74371.1961.62531.8+216
75 to 79351.1701.21881.3+153
80 to 8470.2430.71210.9+114
85 and over130.4380.71421.0+129
Total persons3,226100.05,883100.014,096100.0+10,870

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

Forecast age structure - 5 year age groups
Forecast age structure - 5 year age groups Forecast persons aged 85+,  2036: 142 Forecast persons aged 80-84,  2036: 121 Forecast persons aged 75-79,  2036: 188 Forecast persons aged 70-74,  2036: 253 Forecast persons aged 65-69,  2036: 289 Forecast persons aged 60-64,  2036: 351 Forecast persons aged 55-59,  2036: 457 Forecast persons aged 50-54,  2036: 563 Forecast persons aged 45-49,  2036: 760 Forecast persons aged 40-44,  2036: 947 Forecast persons aged 35-39,  2036: 1,289 Forecast persons aged 30-34,  2036: 1,666 Forecast persons aged 25-29,  2036: 1,630 Forecast persons aged 20-24,  2036: 1,193 Forecast persons aged 15-19,  2036: 763 Forecast persons aged 10-14,  2036: 833 Forecast persons aged 5-9,  2036: 1,221 Forecast persons aged 0-4,  2036: 1,430 Forecast persons aged 85+,  2026: 38 Forecast persons aged 80-84,  2026: 43 Forecast persons aged 75-79,  2026: 70 Forecast persons aged 70-74,  2026: 96 Forecast persons aged 65-69,  2026: 150 Forecast persons aged 60-64,  2026: 190 Forecast persons aged 55-59,  2026: 239 Forecast persons aged 50-54,  2026: 269 Forecast persons aged 45-49,  2026: 330 Forecast persons aged 40-44,  2026: 430 Forecast persons aged 35-39,  2026: 561 Forecast persons aged 30-34,  2026: 685 Forecast persons aged 25-29,  2026: 612 Forecast persons aged 20-24,  2026: 489 Forecast persons aged 15-19,  2026: 323 Forecast persons aged 10-14,  2026: 351 Forecast persons aged 5-9,  2026: 474 Forecast persons aged 0-4,  2026: 530 Forecast persons aged 85+,  2016: 13 Forecast persons aged 80-84,  2016: 7 Forecast persons aged 75-79,  2016: 35 Forecast persons aged 70-74,  2016: 37 Forecast persons aged 65-69,  2016: 70 Forecast persons aged 60-64,  2016: 102 Forecast persons aged 55-59,  2016: 164 Forecast persons aged 50-54,  2016: 196 Forecast persons aged 45-49,  2016: 220 Forecast persons aged 40-44,  2016: 259 Forecast persons aged 35-39,  2016: 262 Forecast persons aged 30-34,  2016: 371 Forecast persons aged 25-29,  2016: 439 Forecast persons aged 20-24,  2016: 418 Forecast persons aged 15-19,  2016: 174 Forecast persons aged 10-14,  2016: 152 Forecast persons aged 5-9,  2016: 128 Forecast persons aged 0-4,  2016: 179
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, December 2017.
Forecast change in age structure - 5 year age groups
Forecast change in age structure - 5 year age groups Forecast persons aged 85+,  2026 to 2036: 104 Forecast persons aged 80-84,  2026 to 2036: 77 Forecast persons aged 75-79,  2026 to 2036: 118 Forecast persons aged 70-74,  2026 to 2036: 157 Forecast persons aged 65-69,  2026 to 2036: 139 Forecast persons aged 60-64,  2026 to 2036: 161 Forecast persons aged 55-59,  2026 to 2036: 218 Forecast persons aged 50-54,  2026 to 2036: 294 Forecast persons aged 45-49,  2026 to 2036: 429 Forecast persons aged 40-44,  2026 to 2036: 516 Forecast persons aged 35-39,  2026 to 2036: 729 Forecast persons aged 30-34,  2026 to 2036: 981 Forecast persons aged 25-29,  2026 to 2036: 1,018 Forecast persons aged 20-24,  2026 to 2036: 704 Forecast persons aged 15-19,  2026 to 2036: 440 Forecast persons aged 10-14,  2026 to 2036: 482 Forecast persons aged 5-9,  2026 to 2036: 747 Forecast persons aged 0-4,  2026 to 2036: 900 Forecast persons aged 85+,  2016 to 2026: 25 Forecast persons aged 80-84,  2016 to 2026: 36 Forecast persons aged 75-79,  2016 to 2026: 35 Forecast persons aged 70-74,  2016 to 2026: 59 Forecast persons aged 65-69,  2016 to 2026: 80 Forecast persons aged 60-64,  2016 to 2026: 88 Forecast persons aged 55-59,  2016 to 2026: 75 Forecast persons aged 50-54,  2016 to 2026: 73 Forecast persons aged 45-49,  2016 to 2026: 110 Forecast persons aged 40-44,  2016 to 2026: 171 Forecast persons aged 35-39,  2016 to 2026: 299 Forecast persons aged 30-34,  2016 to 2026: 314 Forecast persons aged 25-29,  2016 to 2026: 173 Forecast persons aged 20-24,  2016 to 2026: 71 Forecast persons aged 15-19,  2016 to 2026: 149 Forecast persons aged 10-14,  2016 to 2026: 199 Forecast persons aged 5-9,  2016 to 2026: 346 Forecast persons aged 0-4,  2016 to 2026: 351
Population and household forecasts, 2016 to 2036, prepared by .id the population experts, December 2017.

Key findings

In 2016, the dominant age structure for persons in Mortimer District was ages 25 to 29, which accounted for 13.6% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 0 to 4, which is expected to increase by 351 and account for 9.0% of the total persons.

The largest 5 year age group in 2026 is 30 to 34 years, with a total of 685 persons.

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