Winnebago River

General data
- Water type: River
- Progression: Shell Rock River -> West Fork Cedar River -> Cedar River (Iowa tributary) -> Iowa River -> Mississippi River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Description
The Winnebago River is a 72-mile-long (116 km) river in northern Iowa. It is a tributary of the Shell Rock River, part of the Cedar River watershed that flows via the Iowa River to the Mississippi River. The Winnebago River rises in Winnebago County, Iowa, north of Leland and flows south through Forest City, then east and southeast through Mason City on its way to the Shell Rock River at Rockford. Headwater tributaries of the Winnebago River extend north into southern Minnesota.