Muncy Creek
General data
- Name: Muncy Creek
- Water system: Susquehanna River
- Water type: River
- Progression: West Branch Susquehanna River -> Susquehanna River -> Chesapeake Bay -> Atlantic Ocean -> Planet Earth
- Climates: Continental
- Continents: North America
- Countries: United States of America
Muncy Creek (also known as Big Muncy Creek) is a tributary of the West Branch Susquehanna River in Sullivan County and Lycoming County, at Pennsylvania, in the United States. It is approximately 34.5 miles (55.5 km) long. The watershed of the creek has an area of 216 square miles (560 km2). The creek's discharge averages 49 cubic feet per second (1.4 m3/s) at Sonestown, but can be up to a thousand times higher at Muncy. The headwaters of the creek are on the Allegheny Plateau. Rock formations in the watershed include the Chemung Formation and the Catskill Formation.