Statistical area (United States)

The United States federal government defines and delineates the nation's metropolitan areas for statistical purposes, using a set of standard statistical area definitions. the U.S. Office of Management and Budget (OMB) defined and delineated 393 metropolitan statistical areas (MSAs) and 542 micropolitan statistical areas (μSAs) in the United States and Puerto Rico. Many of these 935 MSAs and μSAs are, in turn, components of larger combined statistical areas (CSAs) consisting of adjacent MSAs and μSAs that are linked by commuting ties; 582 metropolitan and micropolitan areas are components of the 184 defined CSAs. A collective term for MSAs, μSAs, and CSAs is primary statistical areas (PSAs), though that term is not used by OMB.

Metropolitan and micropolitan statistical areas are defined as consisting of one or more adjacent counties or county equivalents with at least one urban core area meeting relevant population thresholds, plus adjacent territory that has a high degree of social and economic integration with the core, as measured by commuting ties. A metropolitan statistical area has at least one core with a population of at least 50,000. In a micropolitan statistical area, the largest core has a population of at least 10,000 but less than 50,000.

Types and distribution
The sortable table below shows the number of metropolitan and micropolitan statistical areas in each of the U.S. states, the District of Columbia, and Puerto Rico as of 2020. For each jurisdiction, it lists: Because many metropolitan and micropolitan areas overlap jurisdictional boundaries, columns are not additive.
 * 1) Total number of delineated areas wholly or partially in the named jurisdiction
 * 2) The number of CSAs wholly or partially in the jurisdiction
 * 3) The number of core-based statistical areas (i.e., MSAs and μSAs) wholly or partially in the jurisdiction
 * 4) The number of MSAs wholly or partially in the jurisdiction
 * 5) The number of μSAs wholly or partially in the jurisdiction
 * 6) The number of counties and county-equivalents in the jurisdiction

List of primary statistical areas
The following sortable table lists the 569 primary statistical areas (PSAs) of the United States with the following information:
 * 1) The PSA rank by population as of July 1, 2020
 * 2) The PSA name as designated by the United States Office of Management and Budget
 * 3) The PSA population as of July 1, 2020, as estimated by the United States Census Bureau
 * 4) The PSA population as of April 1, 2010, as enumerated by the 2010 United States census
 * 5) The percent PSA population change from April 1, 2010, to July 1, 2020
 * 6) If the PSA is a combined statistical area, the constituent core-based statistical areas

Puerto Rico
The following sortable table lists the five primary statistical areas (PSAs) of Puerto Rico with the following information:
 * 1) The PSA rank by population as of July 1, 2020, as estimated by the United States Census Bureau
 * 2) The PSA name as designated by the United States Office of Management and Budget
 * 3) The PSA population as of July 1, 2020, as estimated by the United States Census Bureau
 * 4) The PSA population as of April 1, 2010, as enumerated by the 2010 United States census
 * 5) The percent PSA population change from April 1, 2010, to July 1, 2020
 * 6) If the PSA is a combined statistical area, the constituent core-based statistical areas