List of core-based statistical areas
Major statistical areas of the United States and Puerto Rico / From Wikipedia, the free encyclopedia
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The United States Office of Management and Budget (OMB) has defined 925 core-based statistical areas (CBSAs) for the United States and 10 for Puerto Rico.[1] The OMB defines a core-based statistical area as one or more adjacent counties or county equivalents that have at least one urban core area of at least 10,000 population, plus adjacent territory that has a high degree of social and economic integration with the core as measured by commuting ties. The 935 core-based statistical areas currently defined by the OMB include the 393 metropolitan statistical areas (MSAs),[2] which have an urban core population of at least 50,000, and the 542 micropolitan statistical areas (μSAs),[3] which have an urban core population of at least 10,000 but less than 50,000.