| Caribou River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Caribou 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 |
| Length: | 4km (02miles) |
| Source1: | Caribou Lake |
| Source1 Coordinates: | 50.5178°N -89.1725°W |
| Source1 Elevation: | 357m (1,171feet) |
| Mouth: | Smoothrock Lake |
| Mouth Coordinates: | 50.5175°N -89.1731°W |
| Mouth Elevation: | 351m (1,152feet) |
| River System: | James Bay drainage basin |
The Caribou River is a river in the Unorganized Part of Thunder Bay District in Northwestern Ontario, Canada.[1] The river is part of the James Bay drainage basin. It runs from Outlet Bay on Caribou Lake to Caribou Bay on Smoothrock Lake. Smoothrock Lake flows via several outlets including the Ogoki River directly, and then via the Ogoki River and the Albany River to James Bay.