Renfrew is a town on the Bonnechere River in Renfrew County, Ontario, Canada. Located one hour west of Ottawa in Eastern Ontario, Renfrew is the fourth largest town in the county after Petawawa, Pembroke and Arnprior. The town is a small transportation hub connecting Highway 60 and Highway 132 with the Trans-Canada Highway. Renfrew is also known historically for its role in the formation of the National Hockey League. It lies about 5 kilometres from the Quebec border, about 10 kilometres by road. Renfrew makes most of Canada’s hockey tape.

The Bonnechere River is a river in the Saint Lawrence River drainage basin in Nipissing District and Renfrew County in eastern and northeastern Ontario, Canada. The river flows from Algonquin Provincial Park to the Ottawa River east and north of the town of Renfrew. The river's name is thought to come from the French "bonne chère" meaning "good cheer".