| Beaver River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the Beaver River in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Central Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Kenora |
| Source1: | Unnamed lake |
| Source1 Coordinates: | 52.5372°N -83.0644°W |
| Source1 Elevation: | 44m (144feet) |
| Mouth: | Kapiskau River |
| Mouth Coordinates: | 52.6447°N -82.4039°W |
| Mouth Elevation: | 4m (13feet) |
| River System: | James Bay drainage basin |
The Beaver River is a river in the far northeast of Kenora District in Northwestern Ontario, Canada.[1] It is part of the James Bay drainage basin, and is a left tributary of the Kapiskau River.
The river begins at an unnamed lake and first heads north, then southeast. It then turns northeast, and reaches its mouth at the Kapiskau River, which flows to James Bay.