Dog River (Ontario)
General data
- Name: Dog River (Ontario)
- Water system: St. Lawrence River
- Water type: River
- Progression: Kaministiquia River -> Lake Superior -> St. Marys River (Michigan–Ontario) -> Lake Huron -> St. Clair River -> Lake St. Clair (North America) -> Detroit River -> Lake Erie -> Niagara River -> Lake Ontario -> St. Lawrence River -> Gulf of St. Lawrence -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: Canada
Dog River is a river located northwest of Thunder Bay, Ontario, Canada. It enters the northern end of Big Dog Lake and drains at the southern end, continuing to Little Dog Lake and then to its confluence with the Matawin River to form Kaministiquia River.