| Clarke River | |
| Pushpin Map: | New Zealand#New Zealand South Island |
| Pushpin Map Size: | 270px |
| Pushpin Map Caption: | Mouth of the Clarke River |
| Subdivision Type1: | Country |
| Subdivision Name1: | New Zealand |
| Subdivision Type2: | region |
| Subdivision Name2: | West Coast Region |
| Subdivision Type3: | District |
| Subdivision Name3: | Westland District |
| Length: | 27km (17miles) |
| Source1: | Mount Gow |
| Source1 Location: | Solution Range |
| Source1 Coordinates: | -43.835°N 169.7139°W |
| Source1 Elevation: | 1200m (3,900feet) |
| Mouth Coordinates: | -43.9436°N 169.4853°W |
| Mouth Elevation: | 120m (390feet) |
| Progression: | Butler River → Landsborough River → Haast River |
| River System: | Haast River |
The Clarke River in Westland District is the southernmost of three rivers thus-named in the South Island of New Zealand.It is a major tributary of the Haast River, flowing southwest from its source on the slopes of Mount Hooker before joining with the Landsborough River three kilometres before the waters of both flow into the Haast at the point where the latter river turns west towards its outflow into the Tasman Sea.