| Smyth River | |
|---|---|
 | |
| Location | |
| Country | New Zealand |
| Physical characteristics | |
| Mouth | |
• location | Wanganui River |
The Smyth River is a river of the West Coast Region of New Zealand's South Island. It is an upper tributary of the Wanganui River, which it meets to the west of Mount Whitcombe.