| Fox River | |
| Pushpin Map: | Canada |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Manitoba |
| Mouth Coordinates: | 56.052°N -93.292°W |
The Fox River is a river in northern Manitoba, Canada. It flows east-northeast parallel to and between the Nelson River to the north and the Hayes River to the south. It joins the Hayes about 75miles southeast of its mouth on Hudson Bay. About 75miles above its juncture with the Hayes it splits with the southern branch being the Bigstone River. At the head of the Bigstone is Utik or Deer Lake from which it is possible to cross to Cross Lake on the Nelson. This route was part of the "Middle Tract" used by smaller Indian canoes to bring furs to the Hudson's Bay Company posts of Hudson Bay.