| Ōpūrehu River | |
| Source1 Location: | Maungataniwha Range |
| Mouth Location: | Mangamuka River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 12km (07miles) |
The Ōpūrehu River is a river of the Northland Region of New Zealand's North Island. It flows south from the eastern end of the Maungataniwha Range to reach the Mangamuka River at the small settlement of Mangamuka.