| Namu River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Namu River |
| Source1 Coordinates: | -45.1961°N 167.0608°W |
| Mouth Location: | Te Awa-o-Tū / Thompson Sound |
| Mouth Coordinates: | -45.1674°N 166.9935°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Progression: | Namu River → Open Cove → Te Awa-o-Tū / Thompson Sound → Tasman Sea |
The Namu River is a river in Fiordland, New Zealand. It rises north of Mount Namu and flows westward into Open Cove, Te Awa-o-Tū / Thompson Sound.