| Weir River | |
| Pushpin Map: | Canada Manitoba |
| Pushpin Map Caption: | Location of the mouth of the Weir River in Manitoba |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Manitoba |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northern |
| Subdivision Type4: | Census division |
| Subdivision Name4: | 23 |
| Source1: | Weir Lake |
| Source1 Coordinates: | 56.9819°N -94.5628°W |
| Source1 Elevation: | 186m (610feet) |
| Mouth: | Nelson River |
| Mouth Coordinates: | 56.9089°N -93.3575°W |
| Mouth Elevation: | 20m (70feet) |
| River System: | Hudson Bay drainage basin |
The Weir River is a river in the Hudson Bay drainage basin in census division 23 in Northern Manitoba, Canada. Its flows from Weir Lake to the Nelson River as a left tributary, 70km (40miles) upstream of that river's mouth at Hudson Bay.[1]
There is a flag stop on the Hudson Bay Railway where it crosses the river. Canoeists and hikers can wait by a signpost to flag down the Via Rail Winnipeg–Churchill train.