| Rotokakahi River | |
| Source1 Location: | Maungataniwha Range |
| Mouth Location: | Whangape Harbour |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 28km (17miles) |
The Rotokakahi River is a river of the Northland Region of New Zealand's North Island. Its winding course is predominantly southwestward from its origins in the Maungataniwha Range. It reaches the Tasman Sea 25km (16miles) south of Kaitaia, and its estuary forms one of the two arms of Whangape Harbour (the other being the estuary of the Awaroa River).