On the southern boder.
Washington PA is 1 hour south of Pittsburg PA. Washington (city) is the county seat of Washington County PA.
According to the NACo, the county seat of Chester County, Pennsylvania, is West Chester.
According to fedstats.gov, the estimated population of Bucks County, Pennsylvania, is 623,205.
The address of the Adams County Historical Society is: Po Box 4325, Gettysburg, PA 17325-4325
The address of the Historic Gettysburg Adams County Inc is: Po Box 4611, Gettysburg, PA 17325-7894
Erie, PA is in Erie County.
Sullivan County
It is in Tioga County.
montour county
Cumberland County
Chester county
The Teacher's College in Washington County PA was in California, PA (same county) and evolved into California State University.