 As of the 2010 U.S. Census the micropolitan area ranked 7th most populous in the State of Pennsylvania and the 77th most populous in the United States with a population of 77,742.Somerset County is also a part of the Johnstown-Somerset, PA Combined Statistical Area (CSA), which combines the population of both Somerset County and the Cambria County areas.The Combined Statistical Area ranked 10th in the State of Pennsylvania and 130th most populous in the United States with a population of 221,421.