| Fox River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Fox River in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northwestern Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Thunder Bay |
| Source1: | Unnamed lake |
| Source1 Coordinates: | 48.3436°N -85.4647°W |
| Source1 Elevation: | 506m (1,660feet) |
| Mouth: | Pukaskwa River |
| Mouth Coordinates: | 48.2319°N -85.6183°W |
| Mouth Elevation: | 378m (1,240feet) |
| River System: | Great Lakes Basin |
The Fox River is a river in Thunder Bay District in Northwestern Ontario, Canada.[1] It is in the Great Lakes Basin and is a right tributary of the Pukaskwa River, which it enters within Pukaskwa National Park.
The river begins at an unnamed lake and flows southwest into Partridge Lake[2] and then onward into Fox Lake. It continues southwest, enters Pukaskwa National Park, and reaches its mouth at the Pukaskwa River, which flows to Lake Superior.