Connetquot River
General data
- Name: Connetquot River
- Water system: Atlantic Ocean
- Water type: Estuary
- Progression: Great South Bay (Long Island) -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
The Connetquot River (also known as Great River) is a six-mile-long (10 km) river in Islip, New York. It is one of the four longest rivers on Long Island and is recognized by the state as a Wild, Scenic and Recreational River. It is particularly known for its brook, brown and rainbow trout fly fishing.