Pennsylvania has fourteen metropolitan statistical areas (MSAs) and four combined statistical areas (CSAs), as defined by the United States Census Bureau. As of 2020, Philadelphia, the seventh-largest United States metropolitan area, is the state's largest metropolitan area followed by Pittsburgh and Allentown.
Metropolitan statistical areas (MSAs) The following sortable table lists the 18 MSAs of the Commonwealth of Pennsylvania, including: The MSA rank by population as of July 1, 2020, as estimated by the United States Census Bureau The MSA name as designated by the United States Office of Management and Budget The MSA population as of April 1, 2020, as enumerated by the 2020 United States census The MSA population as of April 1, 2010, as enumerated by the 2010 United States census The percent MSA population change from April 1, 2010, to July 1, 2020 The combined statistical area (CSA) if the MSA is a component
Combined statistical areas (CSAs) The following sortable table lists the combined statistical areas (CSAs) of the Commonwealth of Pennsylvania with the following information: CSA rank by population as of July 1, 2020, as estimated by the United States Census Bureau The CSA name as designated by the United States Office of Management and Budget The CSA population as of July 1, 2020, as estimated by the United States Census Bureau CSA population as of April 1, 2010, as enumerated by the 2010 United States Census Percent CSA population change from April 1, 2010, to July 1, 2020 Core Based Statistical Areas (CBSAs) that constitute the CSA (Metropolitan Statistical Areas that are not combined with other MSAs or CBSAs are not also listed below.)