| Castle Island | |
| Location: | Coromandel Peninsula |
| Coordinates: | -36.8689°N 175.8897°W |
| Map: | North Island |
| Area Km2: | 0.02 |
| Length Km: | 0.2 |
| Width Km: | 0.1 |
| Highest Mount: | Ponui |
| Elevation M: | 59 |
| Population: | 0 |
| Country: | New Zealand |
Castle Island is a small uninhabited island off the coast of Hot Water Beach on the Coromandel Peninsula, New Zealand.[1]