Castle Hill South's 2026 population is now estimated at 11,065. In 2001, the population of Castle Hill South was 8,081. Castle Hill South has grown by 139 in the last year, which represents a 1.27% annual change. These population values and projections come from Australia SA2 population series over 10k (ABS) and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Sydney | 4,976,762 | 1.13% |
| Melbourne | 4,928,443 | 1.41% |
| Brisbane | 2,484,138 | 1.61% |
| Perth | 2,218,366 | 1.6% |
| Adelaide | 1,299,185 | 0.84% |
| Gold Coast | 741,661 | 1.93% |
| Canberra | 523,285 | 1.28% |
| Newcastle | 361,877 | 0.74% |
| Central Coast | 343,965 | 1.1% |
| Sunshine Coast | 313,811 | 1.93% |
| Wollongong | 292,054 | 0.82% |
| Hobart | 205,884 | 0.83% |
| Geelong | 190,619 | 1.1% |
| Townsville | 186,562 | 1.4% |
| Cairns | 163,376 | 1.26% |
| Darwin | 130,746 | 1.32% |
| Ballarat | 113,156 | 1.4% |
| Toowoomba | 112,978 | 0.82% |
| Bendigo | 108,707 | 1.51% |
| Maitland | 97,446 | 1.64% |
