Clappertown, Pennsylvania

Clappertown is an unincorporated community and census-designated place (CDP) in Blair County, Pennsylvania, United States. It was first listed as a CDP prior to the 2020 census.

The CDP is in eastern Blair County, in the northwestern part of Huston Township. It is in the Morrisons Cove region of the county, in the valley of Piney Creek, which flows north to the Frankstown Branch of the Juniata River at Ganister, part of the Susquehanna River watershed. Lock Mountain rises to an elevation of 2007 ft just west of Clappertown.

Pennsylvania Route 866 passes through the community, leading northeast 6 mi to Wiliamsburg on the Frankstown Branch, and south-southeast 7 mi to Martinsburg.