 The United States Office of Management and Budget has designated Perry County as the Harrisburg-Carlisle, PA Metropolitan Statistical Area (MSA).As of the 2010 census the metropolitan area ranked 6th most populous in the State of Pennsylvania and the 96th most populous in the United States, with its population of 549,475.Perry County is also a part of the larger Harrisburg-York-Lebanon, PA Combined Statistical Area (CSA), which combines the populations of Perry County as well as Adams, Cumberland, Dauphin, Lebanon and York Counties in Pennsylvania.