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LEARN MORE ABOUT .idIn 2021, the largest age group in North Rocks was 35 to 39 year olds. The group that changed the most since 2016 was 25 to 29 year olds, increasing by 156 people.
The Age Structure of North Rocks 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 Rocks'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 Rocks'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 Rocks - Total persons (Usual residence) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Rouse Hill % | Number | % | Rouse Hill % | 2016 to 2021 |
| 0 to 4 | 488 | 5.3 | 5.8 | 544 | 6.5 | 6.8 | -57 |
| 5 to 9 | 642 | 7.0 | 8.0 | 611 | 7.3 | 9.6 | +30 |
| 10 to 14 | 657 | 7.2 | 8.2 | 545 | 6.5 | 11.0 | +111 |
| 15 to 19 | 537 | 5.9 | 9.5 | 510 | 6.1 | 8.6 | +26 |
| 20 to 24 | 505 | 5.5 | 6.8 | 455 | 5.4 | 5.9 | +49 |
| 25 to 29 | 468 | 5.1 | 4.5 | 311 | 3.7 | 4.0 | +156 |
| 30 to 34 | 536 | 5.9 | 4.9 | 491 | 5.9 | 5.9 | +44 |
| 35 to 39 | 695 | 7.6 | 8.8 | 550 | 6.6 | 7.8 | +144 |
| 40 to 44 | 680 | 7.5 | 8.7 | 600 | 7.2 | 10.5 | +79 |
| 45 to 49 | 683 | 7.5 | 9.3 | 562 | 6.7 | 9.6 | +120 |
| 50 to 54 | 570 | 6.2 | 8.0 | 601 | 7.2 | 5.9 | -32 |
| 55 to 59 | 540 | 5.9 | 5.2 | 554 | 6.6 | 4.8 | -15 |
| 60 to 64 | 509 | 5.6 | 4.1 | 491 | 5.9 | 3.4 | +17 |
| 65 to 69 | 432 | 4.7 | 3.1 | 519 | 6.2 | 2.4 | -88 |
| 70 to 74 | 461 | 5.1 | 2.3 | 450 | 5.4 | 1.9 | +10 |
| 75 to 79 | 369 | 4.0 | 1.5 | 274 | 3.3 | 0.8 | +94 |
| 80 to 84 | 206 | 2.3 | 0.9 | 135 | 1.6 | 0.9 | +70 |
| 85 and over | 148 | 1.6 | 0.6 | 148 | 1.8 | 0.3 | -1 |
| Total population | 9,126 | 100.0 | 100.0 | 8,363 | 100.0 | 100.0 | +763 |
Dominant groups
Analysis of the five year age groups of North Rocks in 2021 compared to Rouse Hill shows that there was a lower proportion of people in the younger age groups (under 15) and a higher proportion of people in the older age groups (65+).
Overall, 19.6% of the population was aged between 0 and 15, and 17.7% were aged 65 years and over, compared with 21.9% and 8.3% respectively for Rouse Hill.
The major differences between the age structure of North Rocks and Rouse Hill were:
- A larger percentage of persons aged 70 to 74 (5.1% compared to 2.3%)
- A larger percentage of persons aged 75 to 79 (4.0% compared to 1.5%)
- A smaller percentage of persons aged 15 to 19 (5.9% compared to 9.5%)
- A smaller percentage of persons aged 45 to 49 (7.5% compared to 9.3%)
Emerging groups
From 2016 to 2021, North Rocks's population increased by 763 people (9.1%). This represents an average annual population change of 1.76% per year over the period.
The largest changes in age structure in this area between 2016 and 2021 were in the age groups:
- 25 to 29 (+156 persons)
- 35 to 39 (+144 persons)
- 45 to 49 (+120 persons)
- 10 to 14 (+111 persons)
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