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City of SydneyPopulation forecast

City of Sydney

Population and age structure

Between 2021 and 2031, the age structure forecasts for City of Sydney indicate a 29.3% increase in females under working age, a 19.7% increase in females of retirement age, and a 31.2% increase in females 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 City of Sydney 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
City of Sydney - Total females202120312035Change between 2021 and 2035
Age group (years)Number%Number%Number%Number
0 to 43,6103.65,0843.95,2533.8+1,643
5 to 92,4062.42,8922.23,0682.2+662
10 to 141,8991.92,2551.72,4891.8+590
15 to 192,9983.06,1234.66,3104.6+3,312
20 to 2411,60011.416,16912.316,63712.1+5,037
25 to 2917,61317.321,04615.921,61415.7+4,001
30 to 3415,92315.719,04814.419,59414.2+3,671
35 to 3910,73210.614,52111.014,95910.8+4,227
40 to 446,9316.810,7958.211,2918.2+4,360
45 to 495,2205.17,7725.98,4756.1+3,255
50 to 544,5464.55,6264.36,3934.6+1,847
55 to 594,1704.14,6023.54,9723.6+802
60 to 643,8883.83,9863.04,1613.0+273
65 to 693,2983.23,2942.53,2912.4-7
70 to 742,6892.62,9232.23,0132.2+324
75 to 791,7381.72,3821.82,4831.8+745
80 to 841,1831.21,8241.41,9891.4+806
85 and over1,1651.11,6301.21,8991.4+734
Total persons101,609100.0131,969100.0137,891100.0+36,282
Source: Population and household forecasts, 2021 to 2041, prepared by .id (informed decisions), November 2022.

Key findings

In 2021, the dominant age structure for females in City of Sydney was ages 25 to 29, which accounted for 17.3% of the total females.

The largest increase in females between 2021 and 2031 is forecast to be in ages 20 to 24, which is expected to increase by 4,569 and account for 12.3% of the total females.

The largest female 5 year age group in 2031 is 25 to 29 years, with a total of 21,046 females.

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