| Partridge River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Partridge 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: | Cochrane |
| Source1: | Partridge Lake |
| Source1 Coordinates: | 50.4014°N -80.3067°W |
| Source1 Elevation: | 266m (873feet) |
| Mouth: | James Bay |
| Mouth Coordinates: | 51.3097°N -80.2922°W |
| Mouth Elevation: | 0m (00feet) |
| River System: | James Bay drainage basin |
| Tributaries Right: | Little Partridge River |
The Partridge River is a river in northern Cochrane District in Northeastern Ontario, Canada.[1] It is a tributary of James Bay situated in between the much larger drainage basins of the Moose River to the west and the Harricana River to the east.
The river begins at Partridge Lake, adjacent to the much larger Kesagami Lake on the Kesagami River, part of Harricana River drainage basin. It exits the lake at the east and turns north, then jogs west through the Kanatotik Rapids before again heading north and passing around Blackbear Island. It continues north around Kaskagonagau Island and Mistikopileo Island, takes in the right tributary Little Partridge River, and reaches its mouth at James Bay.