Moose River (Ontario)
General data
- Name: Moose River (Ontario)
- Water system: Hudson Bay
- Water type: River
- Progression: James Bay -> Hudson Bay -> Arctic ocean -> Planet Earth
- Climates: Subpolar
- Continents: North America
- Countries: Canada
The Moose River is a river in the Hudson Plains ecozone of northern Ontario, Canada. The river flows 100 km northeast from the confluence of the Mattagami and Missinaibi Rivers into James Bay. Its drainage basin is 108,500 square kilometres (41,900 sq mi) and it has a mean discharge rate of 1,370 cubic metres (48,000 cu ft). Its full length is 547 kilometres (340 mi) if counted from the head of the Mattagami River.