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LEARN MORE ABOUT .idIn 2021, the largest age group in Castle Hill was 40 to 44 year olds. The group that changed the most since 2001 was 65 to 69 year olds, increasing by 1,220 people.
The Age Structure of Castle Hill provides key insights into the level of demand for age based services and facilities such as child care. It is also an indicator of Castle Hill'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 Castle Hill'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 | |||||||
|---|---|---|---|---|---|---|---|
| Castle Hill - Total persons (Enumerated) | 2021 | 2001 | Change | ||||
| Five year age groups (years) | Number | % | The Hills Shire % | Number | % | The Hills Shire % | 2001 to 2021 |
| 0 to 4 | 1,631 | 4.7 | 5.8 | 1,437 | 5.6 | 6.5 | +193 |
| 5 to 9 | 2,431 | 6.9 | 7.7 | 1,818 | 7.1 | 7.5 | +613 |
| 10 to 14 | 2,792 | 8.0 | 7.7 | 2,092 | 8.1 | 8.3 | +700 |
| 15 to 19 | 2,418 | 6.9 | 6.8 | 2,263 | 8.8 | 8.3 | +154 |
| 20 to 24 | 2,065 | 5.9 | 5.9 | 1,833 | 7.1 | 6.9 | +232 |
| 25 to 29 | 1,414 | 4.0 | 4.6 | 1,448 | 5.6 | 6.1 | -35 |
| 30 to 34 | 1,653 | 4.7 | 5.5 | 1,447 | 5.6 | 6.6 | +205 |
| 35 to 39 | 2,468 | 7.0 | 7.9 | 1,789 | 7.0 | 7.4 | +679 |
| 40 to 44 | 2,828 | 8.1 | 8.1 | 2,088 | 8.1 | 8.0 | +740 |
| 45 to 49 | 2,744 | 7.8 | 7.5 | 2,151 | 8.4 | 8.2 | +593 |
| 50 to 54 | 2,400 | 6.9 | 6.6 | 2,318 | 9.0 | 8.4 | +82 |
| 55 to 59 | 2,149 | 6.1 | 5.8 | 1,786 | 7.0 | 6.3 | +362 |
| 60 to 64 | 2,032 | 5.8 | 5.1 | 1,087 | 4.2 | 3.9 | +945 |
| 65 to 69 | 1,936 | 5.5 | 4.7 | 716 | 2.8 | 2.4 | +1,220 |
| 70 to 74 | 1,714 | 4.9 | 4.1 | 580 | 2.3 | 2.0 | +1,133 |
| 75 to 79 | 1,196 | 3.4 | 2.9 | 420 | 1.6 | 1.6 | +775 |
| 80 to 84 | 633 | 1.8 | 1.7 | 266 | 1.0 | 0.9 | +366 |
| 85 and over | 528 | 1.5 | 1.5 | 157 | 0.6 | 0.8 | +370 |
| Total population | 35,032 | 100.0 | 100.0 | 25,704 | 100.0 | 100.0 | +9,327 |
Dominant groups
Analysis of the five year age groups of Castle Hill in 2021 compared to The Hills Shire 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 17.1% were aged 65 years and over, compared with 21.2% and 14.9% respectively for The Hills Shire.
The major differences between the age structure of Castle Hill and The Hills Shire were:
- A larger percentage of persons aged 65 to 69 (5.5% compared to 4.7%)
- A larger percentage of persons aged 70 to 74 (4.9% compared to 4.1%)
- A smaller percentage of persons aged 0 to 4 (4.7% compared to 5.8%)
- A smaller percentage of persons aged 35 to 39 (7.0% compared to 7.9%)
Emerging groups
From 2001 to 2021, Castle Hill's population increased by 9,328 people (36.3%). This represents an average annual population change of 1.56% per year over the period.
The largest changes in age structure in this area between 2001 and 2021 were in the age groups:
- 65 to 69 (+1,220 persons)
- 70 to 74 (+1,133 persons)
- 60 to 64 (+945 persons)
- 75 to 79 (+775 persons)
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