Muncy Township is a township in Lycoming County, Pennsylvania, in the United States. The population was 1,059 at the 2000 census. It is part of the Williamsport, Pennsylvania Metropolitan Statistical Area.
The unincorporated village of Pennsdale is located here. There is a Religious Society of Friends (Quaker) Meeting House in Pennsdale that was built in 1799, and is one of the oldest buildings and perhaps the oldest house of worship in the county.