Roxboro was a city on the Island of Montreal. It was founded in 1914, and ceased to exist on 1 January 2002 as a result of municipal reorganization in Quebec. The town was located along the Rivière des Prairies. At the time of the merger with Montreal, its population was 6,000.

The Rivière des Prairies, called the Back River in English, is a delta channel of the Ottawa River in southwestern Quebec, Canada. The Kanien'kehá:ka called it Skowanoti, meaning "River behind the island". The river separates the cities of Laval and Montreal.