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Mosman Municipal CouncilPopulation forecast

Mosman Municipal Council

Population and age structure

Between 2021 and 2026, the age structure forecasts for Mosman Municipal Council indicate a 7.6% decrease in population under working age, a 20.1% increase in population of retirement age, and a 2.3% decrease 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 Mosman Municipal 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
Mosman Municipal Council - Total persons202120262036Change between 2021 and 2036
Age group (years)Number%Number%Number%Number
0 to 41,2614.41,3064.51,2524.4-10
5 to 91,5565.51,3854.81,3444.7-212
10 to 141,8796.61,6465.71,4875.2-392
15 to 191,6255.71,6585.71,3744.8-251
20 to 241,3574.81,4385.01,3064.6-51
25 to 291,3484.71,4725.11,4365.0+88
30 to 341,6765.91,5995.51,5715.5-104
35 to 391,8346.41,6775.81,5725.5-262
40 to 441,8326.41,7666.11,5595.5-273
45 to 492,1207.51,8256.31,6155.7-505
50 to 542,1207.51,9996.91,6815.9-439
55 to 591,9586.91,9666.81,6685.8-290
60 to 641,7566.21,8196.31,7266.0-30
65 to 691,5225.41,6475.71,6855.9+162
70 to 741,5455.41,4785.11,6095.6+64
75 to 791,3234.61,5005.21,5305.4+208
80 to 848372.91,2474.31,3614.8+524
85 and over8983.21,4845.12,7889.8+1,890
Total persons28,449100.028,912100.028,566100.0+117
Source: Population and household forecasts, 2021 to 2036, prepared by .id (informed decisions), January 2023.

Key findings

In 2021, the dominant age structure for persons in Mosman Municipal Council was ages 45 to 49, which accounted for 7.5% of the total persons.

The largest increase in persons between 2021 and 2026 is forecast to be in ages 85 and over, which is expected to increase by 586 and account for 5.1% of the total persons.

The largest 5 year age group in 2026 is 50 to 54 years, with a total of 1,999 persons.

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