- Combined Statistical Area
The

United States Office of Management and Budget (OMB) defines micropolitan and metropolitan statistical areas. Metropolitan and micropolitan statistical areas consist of one or more counties (or county-equivalents). Currently defined metropolitan and micropolitan statistical areas are based on application of the 2000 standards (which appeared in theFederal Register onDecember 27 2000 ) to Census 2000 data, as updated by application of those standards to more recentCensus Bureau population estimates. The current definition is as of December 2006.If specified criteria are met, adjacent metropolitan and micropolitan statistical areas, in various combinations, may become the components of a new set of areas called

**combined statistical areas**(CSAs). Using Census Bureau data the OMB compiles lists of CSAs. The areas that combine retain their own designations as metropolitan or micropolitan statistical areas within the larger combined statistical area. There are 126 CSAs defined by OMB as of December 2006.Note that CSAs represent

**multiple**metropolitan or micropolitan areas that have a moderate degree of employment interchange. CSAs often represent**regions**with overlapping labor and media markets.**ee also***

Geography

**Human geography

***Demography

*United States

**United States Census Bureau

***Core Based Statistical Area

***Demographics of the United States

***Metropolitan Statistical Area

***Micropolitan Statistical Area

***Table of United States Combined Statistical Areas (CSA)

***Table of United States Core Based Statistical Areas (CBSA)

***Table of United States Metropolitan Statistical Areas (MSA)

***Table of United States Micropolitan Statistical Areas (μSA)

***Table of United States primary census statistical areas (PCSA)**External links*** [

*http://www.census.gov/population/www/estimates/metrodef.html List of Combined Statistical Areas*]

* [*http://www.epa.gov/ttn/naaqs/ozone/ozonetech/areapop.txt Environmental Protection Agency list of CSAs with populations*]

* [*http://www.census.gov/popest/metro.html Census Bureau population data and estimates for CSAs and metropolitan/micropolitan areas*]

* [*http://www.whitehouse.gov/omb/ US Office of Management and Budget*]

* [*http://www.census.gov/ US Census Bureau*]

*Wikimedia Foundation.
2010.*

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