Dear Joan: Lancaster, PA, is in Lancaster County, PA. For future reference, at Wal-Mart you can find a Rand McNally Atlas book for the entire USA and Canada. One has to look very carefully to find them, especially in populated areas, but county lines are drawn on all these maps, in either light green or light blue, and the county name is also printed within the boundaries. Hope this helps you in the future. Allan E. Green (with Lancaster Co., Mennonite ancestors)