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LEARN MORE ABOUT .idIn 2021, the largest age group in Castle Hill was 85 and over year olds. The group that changed the most since 2016 was 20 to 24 year olds, decreasing by 86 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 (Usual residence) | 2021 | 2016 | Change | ||||
| Five year age groups (years) | Number | % | Hornsby Heights % | Number | % | Hornsby Heights % | 2016 to 2021 |
| 0 to 4 | 138 | 2.4 | 5.2 | 171 | 3.0 | 6.3 | -34 |
| 5 to 9 | 260 | 4.6 | 7.4 | 322 | 5.7 | 8.5 | -62 |
| 10 to 14 | 392 | 6.9 | 8.4 | 321 | 5.6 | 7.3 | +71 |
| 15 to 19 | 317 | 5.6 | 7.3 | 377 | 6.6 | 7.1 | -61 |
| 20 to 24 | 279 | 4.9 | 5.8 | 364 | 6.4 | 5.4 | -86 |
| 25 to 29 | 198 | 3.5 | 3.0 | 181 | 3.2 | 3.6 | +17 |
| 30 to 34 | 149 | 2.6 | 3.9 | 118 | 2.1 | 4.5 | +30 |
| 35 to 39 | 196 | 3.4 | 6.2 | 238 | 4.2 | 6.5 | -42 |
| 40 to 44 | 329 | 5.8 | 7.4 | 317 | 5.6 | 8.8 | +11 |
| 45 to 49 | 311 | 5.5 | 9.0 | 352 | 6.2 | 7.8 | -41 |
| 50 to 54 | 352 | 6.2 | 7.3 | 401 | 7.0 | 7.6 | -50 |
| 55 to 59 | 365 | 6.4 | 7.2 | 374 | 6.6 | 6.8 | -9 |
| 60 to 64 | 348 | 6.1 | 6.3 | 262 | 4.6 | 5.6 | +85 |
| 65 to 69 | 267 | 4.7 | 4.9 | 230 | 4.0 | 5.7 | +37 |
| 70 to 74 | 258 | 4.5 | 4.7 | 228 | 4.0 | 4.0 | +29 |
| 75 to 79 | 313 | 5.5 | 3.0 | 255 | 4.5 | 2.5 | +57 |
| 80 to 84 | 382 | 6.7 | 1.7 | 339 | 6.0 | 1.2 | +43 |
| 85 and over | 837 | 14.7 | 1.2 | 839 | 14.7 | 0.9 | -2 |
| Total population | 5,691 | 100.0 | 100.0 | 5,698 | 100.0 | 100.0 | -7 |
Dominant groups
Analysis of the five year age groups of Castle Hill in 2021 compared to Hornsby Heights 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, 13.9% of the population was aged between 0 and 15, and 36.1% were aged 65 years and over, compared with 21.0% and 15.5% respectively for Hornsby Heights.
The major differences between the age structure of Castle Hill and Hornsby Heights were:
- A larger percentage of persons aged 85 and over (14.7% compared to 1.2%)
- A larger percentage of persons aged 80 to 84 (6.7% compared to 1.7%)
- A smaller percentage of persons aged 45 to 49 (5.5% compared to 9.0%)
- A smaller percentage of persons aged 5 to 9 (4.6% compared to 7.4%)
Emerging groups
From 2016 to 2021, Castle Hill's population decreased by 7 people (0.1%). This represents an average annual population change of -0.02% per year over the period.
The largest changes in age structure in this area between 2016 and 2021 were in the age groups:
- 20 to 24 (-86 persons)
- 60 to 64 (+85 persons)
- 10 to 14 (+71 persons)
- 5 to 9 (-62 persons)
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