Housatonic River
General data
- Name: Housatonic River
- Water system: Atlantic Ocean
- Water type: River
- Source: West Branch Housatonic River, East Branch Housatonic River
- Progression: Long Island Sound -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
The Housatonic River is a river, approximately 149 miles (240 km) long, in western Massachusetts and western Connecticut in the United States. It flows south to southeast, and drains about 1,950 square miles (5,100 km2) of southwestern Connecticut into Long Island Sound.