| Mangatewai River | |
| Mouth Location: | Tukipo River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 22km (14miles) |
The Mangatewai River is a river of the Hawke's Bay Region of New Zealand's North Island. It flows generally east from the Ruahine Range to reach the Tukipo River (itself a tributary of the Tukituki River) 5km (03miles) north of the township of Takapau.
The Mangatewai River should not be confused with its southern neighbour, the Mangatewainui River.