| Otaua River | |
| Mouth Location: | Punakitere River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
The Otaua River is a river of the Northland Region of New Zealand's North Island. It is a tributary of the Punakitere River, which it reaches 5km (03miles) south of the latter's outflow into the Waima River