| 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: | Region |
| Subdivision Name3: | Northeastern Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Sudbury |
| Source1: | Daisy Lake |
| Source1 Coordinates: | 46.4436°N -80.9006°W |
| Source1 Elevation: | 230m (760feet) |
| Mouth: | North Channel, Lake Huron |
| Mouth Location: | Whitefish Falls |
| Mouth Coordinates: | 46.1083°N -81.7325°W |
| Mouth Elevation: | 176m (577feet) |
| Tributaries Right: | West River |
The Whitefish River is a river in Sudbury District in northeastern Ontario, Canada and a tributary of Lake Huron.
The river begins at Daisy Lake in the city of Greater Sudbury. It flows through Richard, McFarlane and Long Lakes to the unincorporated Eden township, where it flows into Round Lake on the Whitefish Lake Ojibwa reserve. From Round Lake, the river flows into Lake Panache.
Near the western end of Lake Panache, the river flows into Walker Lake, Little Bear Lake and Plunge Lake along the outer boundary of Killarney Lakelands and Headwaters Provincial Park. Where Plunge Lake joins Hannah Lake, the river flows westward, entering Lang Lake. It picks up the Howry Creek system as a tributary at the Whitefish River reserve, and subsequently flows into Charlton Lake. At Willisville, the Cranberry River system also flows into the Whitefish River. The river then flows a short distance further, takes in the right tributary West River, and reaches Whitefish Falls, where it ends at the Bay of Islands on the North Channel of Lake Huron.