| Big Wainihinihi River | |
|---|---|
 Route of the Big Wainihinihi River | |
.png)  Mouth of the Big Wainihinihi River   Big Wainihinihi River (South Island) | |
| Location | |
| Country | New Zealand |
| region | West Coast Region |
| District | Westland District |
| Physical characteristics | |
| Source | Razorback Ridge |
| • location | Tara Tama Range |
| • coordinates | 42°48′57″S 171°22′25″E / 42.81583°S 171.37361°E |
| • elevation | 1,500 m (4,900 ft) |
| Mouth | Taramakau River |
• location | Wainihinihi |
• coordinates | 42°45′20″S 171°20′16″E / 42.75556°S 171.33778°E |
• elevation | 90 m (300 ft) |
| Length | 13.1 kilometres (8.1 mi) |
| Basin features | |
| Progression | Big Wainihinihi River → Taramakau River → Tasman Sea |
| River system | Taramakau River |
The Big Wainihinihi River is a river in the Westland district of New Zealand. It is a tributary of the Taramakau River.