In the United States a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are not legally incorporated as a city or town would be, nor are they legal administrative divisions like counties or sovereign entities like states. As such the precise definition of any given metropolitan area can vary with the source. A typical metropolitan area is centered around a single large city that wields substantial influence over the region (e.g. Chicago). However, some metropolitan areas contain more than one large city with no single municipality holding a dominant position (e.g. Minneapolis – Saint Paul).
MSAs are defined by the U.S. Office of Management and Budget only, and used by the U.S. Census Bureau and other U.S. government agencies for statistical purposes only.
The U.S. Office of Management and Budget (OMB) defines a set of core based statistical areas (CBSAs) throughout the country. CBSAs are delineated on the basis of a central urban area or urban cluster—a contiguous area of relatively high population density. CBSAs are composed of counties and county-equivalents. The counties containing the core urban area are known as the central counties of the CBSA. Additional surrounding counties (known as outlying counties) can be included in the CBSA if these counties have strong social and economic ties to the central counties as measured by commuting and employment. Outlying counties are included in the CBSA if the employment interchange measure (total of in commuting and out commuting) is 25% or more. Note that some areas within these outlying counties may actually be rural in nature. CBSAs are subdivided into metropolitan statistical areas (MSAs) and micropolitan statistical areas based on the population of the core urban area. Under certain conditions, one or more CBSAs may be grouped together to form a larger statistical entity known as a combined statistical area (CSA). Other names, such as Standard Metropolitan Statistical Area (SMSA) and Primary Metropolitan Statistical Area, have been used in the past but are now discontinued. In New England, because of the greater importance of towns over counties, similar areas are defined based on town units, known as New England City and Town Areas (NECTAs). U.S. census statistics for metropolitan areas are reported based on these definitions.
- Combined Statistical Area (CSA)
- United States
- United States Census Bureau
- Office of Management and Budget
- Combined statistical area
- Core Based Statistical Area
- Metropolitan Statistical Area
- Micropolitan Statistical Area
- United States urban area
- Demographics of the United States
- Table of United States Combined Statistical Areas (CSA)
- Table of United States Core Based Statistical Areas (CBSA)
- Table of United States primary census statistical areas (PCSA)
- List of United States urban areas
- List of United States cities by population
- List of regions of the United States
- List of metropolitan areas by population
- List of metropolitan areas in the Americas by population
- List of the largest urban areas of the European Union by population
- World's largest cities
- ^ Nussle, Jim (Nov. 20, 2008). "Update of Statistical Area Definitions and Guidance on Their Uses". Office of Management and Budget. pp. 1-2. http://www.whitehouse.gov/sites/default/files/omb/assets/omb/bulletins/fy2009/09-01.pdf.
- ^ Census Geographic Glossary, U.S. Census Bureau
- ^ "Metropolitan and Micropolitan Statistical Areas". U.S. Census Bureau. http://www.census.gov/population/www/metroareas/metroarea.html. Retrieved 16 February 2010.
- ^ "Metropolitan and NECTA Divisions published by CES". U.S. Bureau of Labor Statistics. January 28, 2011. http://www.bls.gov/sae/saemd.htm.
- ^ "May 2009 Metropolitan and Nonmetropolitan Area Definitions". U.S. Bureau of Labor Statistics. August 16, 2010. http://www.bls.gov/oes/current/msa_def.htm.
- US Census Bureau Population Estimates
- Table 1. Annual Estimates of the Population of Metropolitan and Micropolitan Statistical Areas: April 1, 2000 to July 1, 2005
- U.S. Census 2000 Metropolitan Area Rankings; ranked by population
- U.S. Census 2000 Metropolitan Area Rankings
- Definitions of all Metropolitan Statistical Areas, Metropolitan Divisions
- U.S. Census Metropolitan Area Estimates (1990s)
- U.S. Census Metropolitan and Micropolitan Statistical Area Definitions
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