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Pennville is a census-designated place (CDP) in York County, Pennsylvania, United States. The population was 1,947 at the 2010 census.Pennville is located at 39°47′22″N 76°59′26″W (39.789308, -76.990642) in Penn Township, adjacent to the borough of Hanover.According to the United States Census Bureau, the CDP has a total area of 0.7 square miles (1.8 km2), all of it land.