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LEARN MORE ABOUT .idIn 2021, the largest age group in North Sydney Council area was 30 to 34 year olds. The group that changed the most since 1991 was 35 to 39 year olds, increasing by 2,440 people.
The Age Structure of North Sydney Council area provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of North Sydney Council area'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 North Sydney Council area'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 | |||||||
|---|---|---|---|---|---|---|---|
| North Sydney Council area - Total persons (Enumerated) | 2021 | 1991 | Change | ||||
| Five year age groups (years) | Number | % | Hornsby Shire % | Number | % | Hornsby Shire % | 1991 to 2021 |
| 0 to 4 | 3,392 | 5.0 | 5.0 | 1,912 | 3.8 | 7.4 | +1,480 |
| 5 to 9 | 2,829 | 4.2 | 6.8 | 1,383 | 2.7 | 7.6 | +1,446 |
| 10 to 14 | 2,361 | 3.5 | 7.2 | 1,632 | 3.2 | 8.1 | +729 |
| 15 to 19 | 2,082 | 3.1 | 6.4 | 2,343 | 4.7 | 8.6 | -261 |
| 20 to 24 | 3,296 | 4.9 | 5.5 | 5,364 | 10.7 | 7.1 | -2,068 |
| 25 to 29 | 6,497 | 9.6 | 4.4 | 7,385 | 14.7 | 5.9 | -888 |
| 30 to 34 | 7,849 | 11.6 | 5.1 | 6,063 | 12.0 | 7.3 | +1,786 |
| 35 to 39 | 6,825 | 10.1 | 7.0 | 4,385 | 8.7 | 7.8 | +2,440 |
| 40 to 44 | 5,379 | 8.0 | 7.7 | 3,777 | 7.5 | 8.4 | +1,602 |
| 45 to 49 | 4,481 | 6.6 | 7.5 | 3,299 | 6.6 | 7.1 | +1,182 |
| 50 to 54 | 4,161 | 6.2 | 7.0 | 2,514 | 5.0 | 5.4 | +1,647 |
| 55 to 59 | 3,708 | 5.5 | 6.5 | 1,862 | 3.7 | 4.1 | +1,846 |
| 60 to 64 | 3,551 | 5.3 | 5.8 | 1,977 | 3.9 | 3.8 | +1,574 |
| 65 to 69 | 3,129 | 4.6 | 5.0 | 1,864 | 3.7 | 3.3 | +1,265 |
| 70 to 74 | 3,116 | 4.6 | 4.3 | 1,688 | 3.4 | 2.7 | +1,428 |
| 75 to 79 | 2,291 | 3.4 | 3.4 | 1,446 | 2.9 | 2.3 | +845 |
| 80 to 84 | 1,440 | 2.1 | 2.5 | 981 | 1.9 | 1.7 | +459 |
| 85 and over | 1,178 | 1.7 | 2.8 | 482 | 1.0 | 1.5 | +696 |
| Total population | 67,565 | 100.0 | 100.0 | 50,357 | 100.0 | 100.0 | +17,208 |
Dominant groups
Analysis of the five year age groups of North Sydney Council area in 2021 compared to Hornsby Shire shows that there was a lower proportion of people in the younger age groups (under 15) as well as a lower proportion of people in the older age groups (65+).
Overall, 12.7% of the population was aged between 0 and 15, and 16.5% were aged 65 years and over, compared with 19.1% and 18.0% respectively for Hornsby Shire.
The major differences between the age structure of North Sydney Council area and Hornsby Shire were:
- A larger percentage of persons aged 30 to 34 (11.6% compared to 5.1%)
- A larger percentage of persons aged 25 to 29 (9.6% compared to 4.4%)
- A smaller percentage of persons aged 10 to 14 (3.5% compared to 7.2%)
- A smaller percentage of persons aged 15 to 19 (3.1% compared to 6.4%)
Emerging groups
From 1991 to 2021, North Sydney Council area's population increased by 17,208 people (34.2%). This represents an average annual population change of 0.98% per year over the period.
The largest changes in age structure in this area between 1991 and 2021 were in the age groups:
- 35 to 39 (+2,440 persons)
- 20 to 24 (-2,068 persons)
- 55 to 59 (+1,846 persons)
- 30 to 34 (+1,786 persons)
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