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Inner West CouncilPopulation forecast

Petersham

Population and age structure

Between 2021 and 2031, the age structure forecasts for Petersham indicate a 28.0% increase in population under working age, a 42.2% increase in population of retirement age, and a 37.1% 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 Inner West 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
Petersham - Total persons202120312041Change between 2021 and 2041
Age group (years)Number%Number%Number%Number
0 to 43724.55665.06004.8+228
5 to 93123.84033.64633.7+151
10 to 143444.23473.14323.5+88
15 to 193934.85244.65914.8+198
20 to 246367.71,0929.71,1659.4+529
25 to 2993211.31,47513.11,55212.5+620
30 to 3489310.81,33311.81,39611.3+503
35 to 397679.31,0489.31,1239.1+356
40 to 446197.57887.08937.2+274
45 to 496147.46966.28046.5+190
50 to 546157.56315.67225.8+106
55 to 594305.25454.85954.8+165
60 to 643634.44534.04673.8+104
65 to 693063.73162.83853.1+78
70 to 742362.92912.63452.8+110
75 to 791772.12752.42822.3+105
80 to 841051.32101.92472.0+142
85 and over1361.72732.43412.7+204
Total persons8,250100.011,265100.012,402100.0+4,152
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), July 2023.

Key findings

In 2021, the dominant age structure for persons in Petersham was ages 25 to 29, which accounted for 11.3% of the total persons.

The largest increase in persons between 2021 and 2031 is forecast to be in ages 25 to 29, which is expected to increase by 543 and account for 13.1% of the total persons.

The largest 5 year age group in 2031 is 25 to 29 years, with a total of 1,475 persons.

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