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City of SwanPopulation forecast


Population and age structure

Between 2016 and 2026, the age structure forecasts for Gidgegannup indicate a 49.1% increase in population under working age, a 40.2% increase in population of retirement age, and a 34.0% 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 Gidgegannup 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
Gidgegannup - Total persons201620262051Change between 2016 and 2051
Age group (years)Number%Number%Number%Number
0 to 41284.42456.24446.2+316
5 to 91906.62746.95167.2+326
10 to 142107.32686.85237.3+313
15 to 192097.22506.34336.1+225
20 to 241806.22396.03775.3+197
25 to 291083.82025.13304.6+221
30 to 341113.92245.64005.6+289
35 to 391424.92616.65027.0+360
40 to 442237.72917.35798.1+355
45 to 4928910.02967.56048.5+315
50 to 542679.23168.05678.0+300
55 to 592619.03178.04946.9+233
60 to 641846.42496.34045.7+220
65 to 691374.72025.13114.4+174
70 to 741244.31433.62483.5+124
75 to 79742.5992.51942.7+120
80 to 84401.4691.71381.9+98
85 and over110.4280.7590.8+48
Total persons2,889100.03,974100.07,124100.0+4,234
Source: Population and household forecasts, 2016 to 2051, prepared by .id (informed decisions), May 2019.

Key findings

In 2016, the dominant age structure for persons in Gidgegannup was ages 45 to 49, which accounted for 10.0% of the total persons.

The largest increase in persons between 2016 and 2026 is forecast to be in ages 35 to 39, which is expected to increase by 119 and account for 6.6% of the total persons.

The largest 5 year age group in 2026 is 55 to 59 years, with a total of 317 persons.

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