Blue River (Oklahoma)

General data
- Name: Blue River (Oklahoma)
- Water system: Atchafalaya
- Water type: River
- Progression: Red River of the South -> Atchafalaya -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Description
The Blue River is a 141-mile-long (227 km) tributary of the Red River in southern Oklahoma in the United States. Via the Red River, it is part of the watershed of the Mississippi River.