| Hayes River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Territory |
| Subdivision Name2: | Nunavut |
| Subdivision Type3: | Regions |
| Length: | 335km (208miles) |
| Source1: | Unnamed lake |
| Source1 Location: | Kivalliq Region |
| Source1 Coordinates: | 66.4769°N -90.7689°W |
| Source1 Elevation: | 496m (1,627feet) |
| Mouth: | Back River (Nunavut) |
| Mouth Location: | Kitikmeot Region |
| Mouth Coordinates: | 67.1333°N -95.2833°W |
| Mouth Elevation: | 0m (00feet) |
The Hayes River is a river in the Kitikmeot and Kivalliq Regions of Nunavut, Canada. It is in the Arctic Ocean drainage basin and is a tributary of the Back River.
The river begins at an unnamed lake in Kivalliq Region, and reaches its mouth at the Back River in Kitikmeot Region, just south of that river's mouth at Cockburn Bay on Chantrey Inlet on the Arctic Ocean.