| Clearwater River | |
| Native Name: | Maori: Kairaumati |
| Pushpin Map: | New Zealand South Island#New Zealand |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Clearwater River |
| Source1: | Mount Mitchell |
| Source1 Location: | Western end of Victoria Range |
| Source1 Coordinates: | -43.4789°N 170.0797°W |
| Source1 Elevation: | 1600m (5,200feet) |
| Mouth: | Cook River / Weheka |
| Mouth Location: | 11km (07miles) west of Fox Glacier township |
| Mouth Elevation: | 45m (148feet) |
| Mouth Coordinates: | -43.4528°N 169.8789°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | Region |
| Subdivision Name2: | West Coast |
| Subdivision Type3: | District |
| Subdivision Name3: | Westland |
| Length: | 20km (10miles) |
| Progression: | Clearwater River → Cook River / Weheka → Tasman Sea |
| River System: | Cook River / Weheka |
| Tributaries Left: | Rocky Creek, Carters Creek |
| Tributaries Right: | Lyttles Creek, Souter Creek |
The Clearwater River is on the West Coast of the South Island of New Zealand. The river originates on the northern slopes of Mount Mitchell on the western end of the Victoria Range, only one valley north of the Fox Glacier and Fox River. Clearwater River and its tributary creeks drain land to the north of the Cook River / Weheka. The river flows under a bridge of just north of the Fox Glacier township and passes close to Lake Matheson shortly after before flowing into Cook River / Weheka, which drains into the Tasman Sea.