| Whitefish River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Whitefish River in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Districts |
| Length: | 75km (47miles) |
| Source1: | Mount Sinclair Lake |
| Source1 Location: | Timiskaming, Unorganized West Part, Timiskaming District |
| Source1 Coordinates: | 47.9592°N -80.9542°W |
| Source1 Elevation: | 366m (1,201feet) |
| Mouth: | Night Hawk Lake |
| Mouth Location: | Timmins, Cochrane District |
| Mouth Coordinates: | 48.4383°N -80.9336°W |
| Mouth Elevation: | 274m (899feet) |
| Tributaries Left: | Little Whitefish River |
| Tributaries Right: | East Whitefish River |
The Whitefish River is a river in the James Bay and Moose River drainage basins in Cochrane and Timiskaming Districts in northeastern Ontario, Canada. It flows 75km (47miles) from Mount Sinclair Lake to its mouth at Night Hawk Lake, the source of the Frederick House River, a tributary of the Abitibi River.
The Whitefish River begins at Mount Sinclair Lake, next to the 547m (1,795feet) Mount Sinclair, in the northwest of the Unorganized West Part of Timiskaming District at an elevation of 366m (1,201feet). It heads north and takes in the left tributary Little Whitefish River arriving from Little Whitefish Lake. The river jogs southeast and northeast, then heads north and takes in the right tributary East Whitefish River. It flows northeast into the city of Timmins in Cochrane District, takes in the right tributary Brush Creek, and reaches its mouth at the southeast of Night Hawk Lake at an elevation of 274m (899feet).