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 region. Such regions are not legally incorporated as a city or town would be and are not legal administrative divisions like counties or separate entities such as states. As a result, sometimes the precise definition of a given metropolitan area will vary between sources. The statistical criteria for a standard metropolitan area were defined in 1949 and redefined as a metropolitan statistical area in 1983.
The Louisville metropolitan area is the 43rd largest metropolitan statistical area (MSA) in the United States. It had a population of 1,395,855 in 2020 according to the latest official census, and its principal city is Louisville, Kentucky.
The Kingsport–Bristol–Bristol metropolitan area is a metropolitan statistical area (MSA) in Northeast Tennessee and Southwest Virginia, United States, as defined by the Office of Management and Budget (OMB). It was formed in December 2003 by the merger of the Bristol, VA MSA and Kingsport–Bristol, TN–VA MSA.
The Lynchburg Metropolitan Statistical Area is a United States Metropolitan Statistical Area (MSA) in the state of Virginia, as defined by the Office of Management and Budget (OMB) as of June 2003. As of the 2000 census, the MSA had a population of 228,616. In 2009 this was estimated to have risen to 247,447; as of 2016, the Lynchburg MSA was estimated to have a population of 260,320, making it the fifth-largest metro area in the state.
Pennsylvania has 14 U.S. Census Bureau-designated metropolitan statistical areas (MSAs) and four combined statistical areas (CSAs). As of 2020, Philadelphia, the seventh-largest United States metropolitan area, is the state's largest metropolitan area followed by Pittsburgh and Allentown.
The Alexandria Metropolitan Statistical Area is a metropolitan area in central Louisiana that covers two parishes – Rapides and Grant. As of the 2000 census, the MSA had a population of 145,035.
The Lexington-Fayette–Richmond–Frankfort combined statistical area, created by the United States Bureau of the Census in 2020, is the 71st largest Combined Statistical Area (CSA) of the United States. It consists of the Lexington-Fayette Metropolitan Statistical Area (MSA) and the Micropolitan Statistical Areas of Frankfort, Kentucky, Mount Sterling, and Richmond-Berea.
The Charleston Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of three counties in West Virginia, anchored by the city of Charleston. It is the largest metropolitan area entirely within the state of West Virginia. While the Huntington Metro Area is more populous, it spans three states, and the core county of the Charleston area, Kanawha County, is more populous than the West Virginia portion of the Huntington area.
The Colorado Springs, CO, Metropolitan Statistical Area is a United States Office of Management and Budget defined Metropolitan Statistical Area (MSA) located in the Colorado Springs region of the State of Colorado. The 2020 United States census counted a population of 755,105, an increase of 17.0% since the 2010 United States Census. The Colorado Springs MSA is the 79th-most populous MSA in the United States. The Colorado Springs MSA encompasses El Paso County and Teller County, Colorado. Approximately 88.40% percent of the MSA's population live in cities or CDPs. The Colorado Springs Metropolitan Statistical Area is the second-most populous component of the Front Range Urban Corridor.
The Knoxville metropolitan area, commonly known as Greater Knoxville, is a metropolitan statistical area (MSA) centered on Knoxville, Tennessee, the third largest city in Tennessee and the largest city in East Tennessee. It is the third largest metropolitan area in Tennessee. In 2020, the Knoxville metro area had a population of 879,773, and a population of 903,300 including Grainger County. The Knoxville–Morristown–Sevierville Combined Statistical Area (CSA) had a population of 1,156,861 according to the census bureau in 2020.
The Rockford Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of four counties in north-central Illinois, anchored by the city of Rockford. As of the 2010 census, the MSA had a population of 349,431. The Rockford MSA abuts the southern portions of the Janesville-Beloit MSA and the Chicago MSA. It forms the main part of the larger Rockford–Freeport–Rochelle Combined Statistical Area.
The Paducah, KY–IL Metropolitan Statistical Area, as defined by the United States Census Bureau, is an area consisting of five counties – three in the Jackson Purchase region of Kentucky, a fourth Kentucky county bordering the Purchase, and one in Southern Illinois – anchored by the city of Paducah, Kentucky. The Paducah KY-IL Micropolitan Statistical Area was upgraded to Metropolitan Statistical Area (MSA) status on July 21, 2023, by the Office of Management and Budget.. Carlisle County, Kentucky, was added to the area following the 2020 Census of the Population. The total MSA population from the 2020 United States Census was 103,486.
The Mayagüez Metropolitan Statistical Area is a United States Census Bureau defined Metropolitan Statistical Area (MSA) in west central Puerto Rico. A July 1, 2009 Census Bureau estimate placed the population at 109,842, a 4.53% decrease from the 2000 census figure of 115,048.
The San Juan metropolitan area is a United States Census Bureau defined metropolitan statistical area (MSA) in northeastern Puerto Rico centered around the city of San Juan. A July 1, 2009, Census Bureau estimate placed the population at 2,617,089, a 4.31% increase over the 2000 census figure of 2,509,007.
The Hagerstown–Martinsburg metropolitan area, officially designated by the United States Office of Management and Budget (OMB) as Hagerstown–Martinsburg, Maryland–West Virginia Metropolitan Statistical Area (MSA), constitutes the primary cities of Hagerstown, Maryland; Martinsburg, West Virginia; and surrounding areas in three counties: Washington County, Maryland; Berkeley County, West Virginia; and Morgan County, West Virginia. The metro area lies mainly within the rich, fertile Cumberland and Shenandoah valleys, and is approximately a 60–90 minute drive from Washington, D.C.; Baltimore, Maryland; and Harrisburg, Pennsylvania; Hagerstown is approximately 75 miles (121 km) driving distance from all three cities. The population of the metropolitan area as of 2008 is 263,753.
The Lima metropolitan statistical area, as defined by the United States Census Bureau, is an area consisting of one county – Allen – in Northwest Ohio, anchored by the city of Lima. As of the 2000 census, the MSA had a population of 108,473.
The United States federal government defines and delineates the nation's metropolitan areas for statistical purposes, using a set of standard statistical area definitions. As of 2020, the U.S. Office of Management and Budget (OMB) defined and delineated 392 metropolitan statistical areas (MSAs) and 547 micropolitan statistical areas (μSAs) in the United States and Puerto Rico. Many of these 939 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; as of 2020, 551 metropolitan and micropolitan areas are components of the 175 defined CSAs. A collective term for MSAs, μSAs, and CSAs is primary statistical areas (PSAs), though that term is not used by OMB.
