The Saugeen River is located in southern Ontario, Canada. The river begins in the Osprey Wetland Conservation Lands and flows generally north-west about 160 kilometres (99 mi) before exiting into Lake Huron. The river is navigable for some distance, and was once an important barge route. Today the river is best known for its fishing and as a canoe route.
The river's name comes from an Ojibwa language word Zaagiing, meaning outlet. Another source is more specific, indicating that "Saugeen" is the corrupted form of the Ojibwa word meaning the entrance or mouth of the river.