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Alexandrina CouncilPopulation forecast

Alexandrina Council

Population and age structure

Between 2021 and 2026, the age structure forecasts for Alexandrina Council indicate a 5.2% increase in population under working age, a 12.8% increase in population of retirement age, and a 5.0% 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 Alexandrina Council 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
Alexandrina Council - Total persons202120262041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 41,1854.01,3754.41,6734.2+488
5 to 91,4234.91,4874.71,9595.0+536
10 to 141,6505.61,6195.12,0945.3+444
15 to 191,4675.01,5434.91,8564.7+388
20 to 241,0743.71,2093.81,4053.6+331
25 to 291,0743.71,1323.61,3993.6+325
30 to 341,2654.31,2584.01,5894.0+324
35 to 391,3034.41,4594.61,7934.5+489
40 to 441,3894.71,5374.91,9815.0+593
45 to 491,7065.81,6455.22,1765.5+470
50 to 541,8326.21,9366.12,3486.0+515
55 to 592,0507.02,1656.92,6246.7+573
60 to 642,4978.52,5508.13,0477.7+550
65 to 692,6609.12,9529.43,4788.8+819
70 to 742,7139.32,8429.03,4398.7+726
75 to 791,9046.52,4757.92,9727.5+1,068
80 to 841,2114.11,4624.62,2195.6+1,008
85 and over9163.18802.81,3563.4+440
Total persons29,321100.031,523100.039,409100.0+10,088
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), February 2023.

Key findings

In 2021, the dominant age structure for persons in Alexandrina Council was ages 70 to 74, which accounted for 9.3% of the total persons.

The largest increase in persons between 2021 and 2026 is forecast to be in ages 75 to 79, which is expected to increase by 571 and account for 7.9% of the total persons.

The largest 5 year age group in 2026 is 65 to 69 years, with a total of 2,952 persons.

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