Cockermouth River
General data
- Name: Cockermouth River
- Water system: Merrimack River
- Water type: River
- Progression: Newfound Lake -> Newfound River (New Hampshire) -> Pemigewasset River -> Merrimack River -> Gulf of Maine -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
The Cockermouth River is a 9.5-mile-long (15.3 km) stream located in central New Hampshire in the United States. It is the longest tributary of Newfound Lake, part of the Pemigewasset River and ultimately Merrimack River watersheds.