| Castle River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Castle River |
| Source1 Location: | Barrier Peak |
| Source1 Coordinates: | -44.8374°N 167.729°W |
| Source1 Elevation: | 890m (2,920feet) |
| Mouth Location: | Worsley Stream |
| Mouth Elevation: | 235m (771feet) |
| Mouth Coordinates: | -44.926°N 167.7779°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 13km (08miles) |
| Progression: | Castle River → Worsley Creek → Worsley Arm → Lake Te Anau → Waiau River → Foveaux Strait |
The Castle River is a river in Fiordland National Park in the Southland Region of New Zealand. It rises on the slopes of Barrier Peak and flows southeast in a steep-walled valley running parallel to the Clinton Canyon before turning south. It is a tributary of Worsley Stream which empties into the Worsley Arm of Lake Te Anau.[1]