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LEARN MORE ABOUT .idIn 2021, the largest age group in Greater Sydney was 30 to 34 year olds. The group that changed the most since 2006 was 35 to 39 year olds, increasing by 95,965 people.
The Age Structure of Greater Sydney provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Greater Sydney's residential role and function and how it is likely to change in the future.
Five year age groups present a classic age profile of the population. Each age group covers exactly five years, which enables direct comparison between each group.
To get a more complete picture Greater Sydney's Age Structure should be viewed in conjunction with Household Types and Dwelling Types.
Q:
Derived from the Census question:
'What is the person's date of birth or age?'
| Age structure - Five year age groups | |||||||
|---|---|---|---|---|---|---|---|
| Greater Sydney - Total persons (Enumerated) | 2021 | 2006 | Change | ||||
| Five year age groups (years) | Number | % | Victoria % | Number | % | Victoria % | 2006 to 2021 |
| 0 to 4 | 311,771 | 6.0 | 5.8 | 270,076 | 6.6 | 6.2 | +41,695 |
| 5 to 9 | 327,929 | 6.3 | 6.2 | 265,594 | 6.5 | 6.4 | +62,335 |
| 10 to 14 | 320,601 | 6.2 | 6.0 | 266,056 | 6.5 | 6.7 | +54,545 |
| 15 to 19 | 293,365 | 5.6 | 5.6 | 272,395 | 6.6 | 6.9 | +20,970 |
| 20 to 24 | 341,071 | 6.5 | 6.3 | 296,296 | 7.2 | 6.9 | +44,775 |
| 25 to 29 | 391,848 | 7.5 | 7.3 | 301,884 | 7.4 | 6.6 | +89,964 |
| 30 to 34 | 416,689 | 8.0 | 7.7 | 324,066 | 7.9 | 7.2 | +92,623 |
| 35 to 39 | 412,365 | 7.9 | 7.6 | 316,400 | 7.7 | 7.6 | +95,965 |
| 40 to 44 | 363,449 | 7.0 | 6.6 | 310,906 | 7.6 | 7.5 | +52,543 |
| 45 to 49 | 343,687 | 6.6 | 6.4 | 294,483 | 7.2 | 7.3 | +49,204 |
| 50 to 54 | 321,272 | 6.2 | 6.3 | 260,541 | 6.4 | 6.6 | +60,731 |
| 55 to 59 | 302,006 | 5.8 | 5.9 | 238,822 | 5.8 | 6.1 | +63,184 |
| 60 to 64 | 274,009 | 5.3 | 5.5 | 180,592 | 4.4 | 4.6 | +93,417 |
| 65 to 69 | 232,739 | 4.5 | 4.8 | 138,739 | 3.4 | 3.7 | +94,000 |
| 70 to 74 | 203,383 | 3.9 | 4.3 | 114,179 | 2.8 | 3.1 | +89,204 |
| 75 to 79 | 146,478 | 2.8 | 3.1 | 104,008 | 2.5 | 2.8 | +42,470 |
| 80 to 84 | 102,004 | 2.0 | 2.2 | 80,178 | 2.0 | 2.1 | +21,826 |
| 85 and over | 105,566 | 2.0 | 2.2 | 65,931 | 1.6 | 1.7 | +39,635 |
| Total population | 5,210,232 | 100.0 | 100.0 | 4,101,146 | 100.0 | 100.0 | +1,109,086 |
Dominant groups
Analysis of the five year age groups of Greater Sydney in 2021 compared to Victoria shows that there was a similar proportion of people in the younger age groups (under 15) and a lower proportion of people in the older age groups (65+).
Overall, 18.4% of the population was aged between 0 and 15, and 15.2% were aged 65 years and over, compared with 18.1% and 16.6% respectively for Victoria.
There were no major differences between Greater Sydney and Victoria in 2021.
Emerging groups
From 2006 to 2021, Greater Sydney's population increased by 1,109,086 people (27.0%). This represents an average annual population change of 1.61% per year over the period.
The largest changes in age structure in this area between 2006 and 2021 were in the age groups:
- 35 to 39 (+95,965 persons)
- 65 to 69 (+94,000 persons)
- 60 to 64 (+93,417 persons)
- 30 to 34 (+92,623 persons)
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