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City of Port Adelaide EnfieldPopulation forecast

Northgate - Oakden - Gilles Plains

Population and age structure

Between 2021 and 2031, the age structure forecasts for Northgate - Oakden - Gilles Plains indicate a 6.9% decrease in males under working age, a 20.5% increase in males of retirement age, and a 25.8% increase in males 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 City of Port Adelaide Enfield 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
Northgate - Oakden - Gilles Plains - Total males202120312046Change between 2021 and 2046
Age group (years)Number%Number%Number%Number
0 to 47406.56684.96534.5-87
5 to 97036.26384.76064.1-97
10 to 146255.56204.65623.8-63
15 to 195284.65984.45403.7+12
20 to 249027.98176.07555.2-147
25 to 291,1249.81,0858.01,0857.4-39
30 to 341,1109.71,40110.31,3889.5+278
35 to 391,14910.11,51311.11,46810.0+319
40 to 449047.91,40810.31,3829.5+478
45 to 496986.11,2999.51,3609.3+662
50 to 546245.58156.01,1207.7+496
55 to 595524.85834.39196.3+367
60 to 644233.75594.17865.4+363
65 to 693993.55103.75824.0+183
70 to 743463.03692.74252.9+79
75 to 793172.83322.44363.0+119
80 to 841651.42411.83082.1+143
85 and over1161.01661.22381.6+122
Total persons11,425100.013,623100.014,614100.0+3,189
Source: Population and household forecasts, 2021 to 2046, prepared by .id (informed decisions), May 2024.

Key findings

In 2021, the dominant age structure for males in Northgate - Oakden - Gilles Plains was ages 35 to 39, which accounted for 10.1% of the total males.

The largest increase in males between 2021 and 2031 is forecast to be in ages 45 to 49, which is expected to increase by 601 and account for 9.5% of the total males.

The largest male 5 year age group in 2031 is 35 to 39 years, with a total of 1,513 males.

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