Cosna River
General data
- Name: Cosna River
- Water system: Yukon
- Water type: River
- Progression: Tanana River -> Yukon -> Bering Sea -> Pacific Ocean -> Planet Earth
- Climates: Subpolar
- Continents: North America
- Countries: United States of America
The Cosna River is a 44-mile (71 km) tributary of the Tanana River in the central part of the U.S. state of Alaska. It flows northward from the Bitzshtini Mountains into the Tanana west (downstream) of Manley Hot Springs.