River Raisin (Michigan)
General data
- Name: River Raisin (Michigan)
- Water system: St. Lawrence River
- Water type: River
- Progression: Lake Erie -> Niagara River -> Lake Ontario -> St. Lawrence River -> Gulf of St. Lawrence -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
The River Raisin is a 135-mile-long (217 km) river in southeast Michigan, United States, that flows in a generally easterly direction through glacial sediments before emptying into Lake Erie. The River Raisin drainage basin covers approximately 1,072 square miles (2,780 km2) in the Michigan counties of Monroe, Lenawee, Washtenaw, Jackson, and Hillsdale, along with Fulton County in northwest Ohio.