About Greencastle, Pennsylvania
Greencastle is a borough in Franklin County in south-central Pennsylvania, United States. The population was 3,996 at the 2010 census. Greencastle lies within the Cumberland Valley of Pennsylvania.
Greencastle is located in southern Franklin County at 39°47′22″N 77°43′36″W / 39.78944°N 77.72667°W / 39.78944; -77.72667 (39.789466, -77.726604). It is surrounded by Antrim Township. U.S. Route 11 passes through the west side of the borough as Antrim Way, leading north 11 miles (18 km) to Chambersburg, the county seat, and south 11 miles to Hagerstown, Maryland. Pennsylvania Route 16 passes thr...
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