Duncannon, Pennsylvania

Duncannon is a small borough in Perry County, Pennsylvania, United States, standing beside the Susquehanna River in the central part of the state and within the Harrisburg-Carlisle metropolitan area. It was first laid out in 1792 under the name Petersburg and took its present name from nearby Duncan's Island in the river. The 2020 census counted 1,473 residents. The borough is best known as the place where the center of population of Pennsylvania lies, and for decades it was home to the Lightning Guider sled factory, which made sleds there from 1904 until 1988. The Appalachian Trail runs through the town along its streets and comes down off the mountain onto Inn Road. The missionary David Brainerd wrote in his journal of staying with an Indian tribe on Duncan's Island, across the river, in the 1740s.