| West River | |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ontario |
| Subdivision Type2: | Region |
| Subdivision Name2: | Northeastern Ontario |
| Subdivision Type3: | District |
| Subdivision Name3: | Sudbury |
| Pushpin Map: | Ontario |
| Pushpin Map Caption: | Location of West River in Ontario |
| Coordinates: | 46.1453°N -81.7539°W |
| Elevation M: | 215 |
| Population Density Km2: | auto |
| Timezone1: | Eastern Time Zone |
| Utc Offset1: | -5 |
| Timezone1 Dst: | Eastern Time Zone |
| Utc Offset1 Dst: | -4 |
| Postal Code Type: | FSA |
| Postal Code: | P0M |
| Area Code: | 705 |
West River is an unincorporated community in the geographic township of Mongowin, Sudbury District in Northeastern Ontario, Canada. It is named for the West River, which flows through the community just upstream of its mouth at the Whitefish River.
West River lies on Ontario Highway 6, and is approximately 15km (09miles) south of Espanola and 5km (03miles) north of Whitefish Falls.
The community was formerly a stop along the Algoma Eastern Railway, which linked Manitoulin Island with Lake Huron's North Shore and, ultimately, with Sudbury. The historic rail line has been defunct for a number of years and the tracks have been lifted south of Espanola.