East Pennsboro Township is a township in Cumberland County, Pennsylvania, United States. The population was 20,228 at the 2010 census, up from 18,254 at the 2000 census. East Pennsboro is the second most populous municipality in Cumberland County. The township is located along the western banks of the Susquehanna River, across from Harrisburg. There are many large corporations based in East Pennsboro Township that use the Camp Hill postal address, including the Rite Aid Corporation and Gannett Fleming.