United States metropolitan area: Wikis

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The Metropolitan Statistical Areas are shown in red on this enlargeable map of the Core Based Statistical Areas of the United States.

In the United States, a metropolitan area refers to a geographical region with a relatively high population density at its core and close economic ties throughout the area.[1] Such regions are not legally incorporated as a city or town would be, nor are they legal administrative divisions like counties or 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. Chicagoland). However, some metropolitan areas contain more than one large city with no single municipality holding a dominant position (e.g. Minneapolis – Saint Paul).

Some U.S. government agencies publish definitions of metropolitan areas for accounting and tracking purposes. The most widely used are those published by the Office of Management and Budget. These are used by the U.S. Census Bureau for its demographics statistics as well as many other agencies.

Contents

Definitions

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. 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 and Primary Metropolitan Statistical Area, have been used in the past but are now discontinued.[2] CBSAs are composed of counties and county-equivalents.[3] 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.

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Definition issues

MSAs are used for official accounting purposes, but they are not the only estimates of metropolitan area populations available. The appropriate boundaries - and therefore population figures - for some metro areas are much debated, and in some cases reputable sources provide figures which differ by millions. The most contentious examples include the Greater Los Angeles Area, the San Francisco Bay Area, and Greater Cleveland. However, some of these boundaries are addressed by CSAs. The official definitions used for the last U.S. Census differed from those for previous censuses, making comparisons difficult even between official figures at different dates (comparing 2000 with 1990, Baltimore was separated from Washington, D.C., but West Palm Beach was combined with Miami-Fort Lauderdale, which made a considerable difference to the rankings of both metros). Care should also be taken when comparing MSA figures with population figures for cities or metro areas outside the U.S., which may be based on substantially different boundary systems and definitions of terms. Additionally, United States MSA boundaries do not stretch into neighboring countries such as Canada or Mexico, so border cities such as Detroit, Buffalo, El Paso and San Diego would count only U.S. population figures.

As of June 2003, there is now an additional classification, that of a “Metropolitan Division.” The term metropolitan division is used to refer to a county or group of closely-tied contiguous counties that serve as a distinct employment region within a metropolitan statistical area that has a population core of at least 2.5 million. While a metropolitan division is a subdivision of a larger metropolitan statistical area, it often functions as a distinct social, economic, and cultural area within the larger region.

See also

United States census statistical areas by state, district, or territory
AS
GU
MP
VI

References

External links


Simple English

Metropolitan Statistical Areas (MSA) are large metropolitan areas of the United States as defined by the Office of Management and Budget. These areas are urban area a high population density. An earlier version of the MSA was the "Standard Metropolitan Statistical Area" (SMSA). MSAs are used for official purposes.

MSAs are made up of counties and for some county equivalents[1]. In New England, because of the greater importance of towns over counties, similar areas are based on town units. These are called New England City and Town Areas (NECTAs).

MSAs are creatded around a central urban area —a single area of high population density. The counties which the urbanized area are located in are known as the central counties of the MSA. Other nearby counties (known as outlying counties) can be a part of the MSA if these counties have strong social and economic connections to the central counties. Aome areas within these outlying counties may actually be rural areas.

The population estimates for some metro areas are not always agreed upon. In some cases, different sources give numbers of people which differ by millions. The definitions used for the last U.S. Census differed from those for previous censuses. This makes it hard to compare official information from different dates. MSA boundaries do not stretch into Canada or Mexico. This can affect the actual population in several cities. For example, Detroit, Buffalo, El Paso and San Diego are often much larger than their MSA figures.

As of June 2003, there is now an additional classification, “Metropolitan Division.” The term metropolitan division is used for a county or group of counties that are a distinct employment area within a metropolitan statistical area that has a population of at least 2.5 million people. A metropolitan division is a part of a larger metropolitan statistical area but it is often a distinct social, economic, and cultural area within the larger region.

Top 25

The following is a list of the 25 most populated metropolitan statistical areas and metropolitan divisions in the United States, according to the July 1, 2007 U.S. Census Bureau estimates:[2]

Rank Metropolitan Area Metropolitan Divisions State(s) Population
1 New York–Northern New Jersey–Long Island   NYNJPA 18,815,988
  Edison NJ 2,319,704
  Nassau–Suffolk NY 2,759,762
  Newark–Union NJ-PA 2,128,679
  New York–White Plains–Wayne NY-NJ 11,607,843
2 Los Angeles–Long Beach–Santa Ana   CA 12,875,587
  Los AngelesLong BeachGlendale 9,878,554
  Santa Ana–Anaheim–Irvine 2,997,033
3 Chicago–Naperville–Joliet   ILINWI 9,524,673
  ChicagoNapervilleJoliet IL 7,952,540
  Gary IN 698,971
  Lake County–Kenosha County IL–WI 873,162
4 Dallas–Fort Worth–Arlington   TX 6,145,037
  Dallas–Plano–Irving 4,111,529
  Fort WorthArlington 2,033,508
5 Philadelphia–Camden–Wilmington PA–NJ–DEMD 5,827,962
  Camden NJ 1,246,339
  Philadelphia PA 3,887,694
  Wilmington DE–MD–NJ 693,929
6 Houston–Sugar Land–Baytown   TX 5,628,101
7 Miami–Fort Lauderdale–Pompano Beach   FL 5,413,212
  Fort LauderdalePompano BeachDeerfield Beach 1,759,591
  MiamiMiami Beach–Kendall 2,387,170
  West Palm BeachBoca RatonBoynton Beach 1,266,451
8 Washington–Arlington–Alexandria   DCVA–MD–WV 5,306,565
  Bethesda-Gaithersburg–Frederick MD 1,155,518
  WashingtonArlingtonAlexandria DC–MD–VA–WV 4,151,047
9 Atlanta–Sandy Springs–Marietta   GA 5,278,904
10 Boston–Cambridge–Quincy   MANH 4,482,857
  BostonQuincy MA 1,858,216
  Cambridge–Newton–Framingham 1,473,416
  Peabody 733,101
  Rockingham County–Strafford County NH 418,124
11 Detroit–Warren–Livonia   MI 4,467,592
  Detroit–Livonia–Dearborn 1,985,101
  Warren–Troy–Farmington Hills 2,482,491
12 San Francisco–Oakland–Fremont   CA 4,203,898
  Oakland–Fremont–Hayward 2,483,842
  San Francisco–San Mateo–Redwood City 1,720,056
13 Phoenix–Mesa–Scottsdale   AZ 4,179,427
14 Seattle–Tacoma–Bellevue   WA 4,109,347
  SeattleBellevueEverett 2,536,182
  Tacoma 773,165
15 Riverside–San Bernardino–Ontario   CA 4,081,371
16 Minneapolis–St. Paul–Bloomington   MN–WI 3,208,212
17 San Diego–Carlsbad–San Marcos[3]   CA 2,974,859
18 St. Louis   MOIL 2,803,707
19 Tampa–St. Petersburg–Clearwater   FL 2,723,949
20 Baltimore–Towson   MD 2,668,056
21 Charlotte[4]   NC 2,566,399
22 Denver–Aurora   CO 2,464,866
23 Pittsburgh   PA–WV 2,355,712
24 Portland–Vancouver–Beaverton   OR–WA 2,175,113
25 Cincinnati–Middletown   OH-KY-IN 2,133,678
26 Cleveland–Elyria–Mentor   OH 2,096,471
For all U.S. Metropolitan Statistical Areas, see the Table of United States Metropolitan Statistical Areas.
For a list including combined metropolitan areas, see the Table of United States primary census statistical areas.


Notes

  1. Census Geographic Glossary, U.S. Census Bureau
  2. http://www.census.gov/population/www/estimates/metro_general/2007/CBSA-EST2007-01.csv
  3. This population is only for the United States side. The area is also included together with the city of Tijuana in Mexico in the bi-national conurbation known as the San Diego-Tijuana Metropolitan Area which together have a population of 4,945,410.
  4. http://www.charlottechamber.com/index.php?src=gendocs&refno=1292&category=Demo_ecoProfile&search=population

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