The Weir River is a river in the Hudson Bay drainage basin in census division 23 in Northern Manitoba, Canada.

[1] Its flows from Weir Lake to the Nelson River as a left tributary, 70 kilometres (43 mi) upstream of that river's mouth at Hudson Bay.

[2] 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.

This article related to a river in Manitoba, Canada is a stub.