| Tunakino River | |
| Mouth Location: | Opouri River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Length: | 100NaN0 |
The Tunakino River is a river of the Marlborough Region of New Zealand's South Island. It flows south from its origins in a coastal rim of hills at the base of the Marlborough Sounds to reach the Opouri River 5km (03miles) east of Rai Valley.