The French River (French: ''Rivière des Français'' or in Ojibway Wemitigoj-Sibi) is a river in Central Ontario, Canada. It flows 110 kilometres (68 mi) from Lake Nipissing west to Georgian Bay. The river largely follows the boundary between the Parry Sound District and the Sudbury District, and in most contexts is considered the dividing line between Northern Ontario and Southern Ontario. The French River was designated a Canadian Heritage River in 1986.