The United States Office of Management and Budget (OMB) has defined 124 Combined Statistical AreasThe United States Census Bureau defines a Combined Statistical Area (CSA) as an aggregate of adjacent Core Based Statistical Areas that are linked by commuting ties. (CSAs) for the United States of America. The OMB defines a Combined Statistical Area as an aggregate of adjacent Core Based Statistical AreasThe 940 Core Based Statistical Areas (CBSAs) currently defined by the United States Census Bureau include the 363 Metropolitan Statistical Areas (MSAs), which have an urban core population of 50,000 or more, and the 577 Micropolitan Statistical Areas (μSAs), which have an urban core population of 10,000 or more but less than 50,000. (CBSAs) that are linked by commuting ties.
The Combined Statistical Area is the most expansive of the metropolitan area concepts employed by the OMB. The population of a Combined Statistical Area is greater than any of its (often similarly named) constituent Core Based Statistical Areas. Some major cities do not have an associated Combined Statistical Area, and some cities have urban zones which spread into neighboring nations, the Census Bureau does not count these zones, such as in El Paso and San Diego.

Table

The following sortable table lists the 124 Combined Statistical Areas (CSAs) of the United States with the following information:

• The CSA rank by population as of July 1, 2008, as estimated by the United States Census Bureau

• The CSA name as defined by the United States Office of Management and Budget

• The CSA population as of July 1, 2008, as estimated by the United States Census Bureau

• The CSA population as of April 1, 2000, as counted by the United States Census 2000

• The percent CSA population change from April 1, 2000, to July 1, 2008, as estimated by the United States Census Bureau

• The Core Based Statistical Areas (CBSAs) that constitute the CSA

Please note:  The Office of Management and Budget only defines a Combined Statistical Area if two or more adjacent Core Based Statistical Areas have substantial commuting ties. Many large metropolitan areas such as the Miami-Fort Lauderdale-Pompano Beach, FL MSA, the Phoenix-Mesa-Scottsdale, AZ MSA, the San Diego-Carlsbad-San Marcos, CA MSA, the Tampa-St. Petersburg-Clearwater, FL MSA, the Portland-Vancouver-Beaverton, OR-WA MSA, and the San Antonio, TX MSA are not part of a Combined Statistical Area.

• See the Table of United States Core Based Statistical Areas for a comprehensive list of the Metropolitan Statistical Areas and Micropolitan Statistical Areas of the United States.

• See the Table of United States primary census statistical areas for an overview of the single-core and multi-core metropolitan areas of the United States.

United States Census Bureau estimates of CSA population for 2009 will be available about March 31, 2010.

See also

• Geography

• *Human geography

• **Demography

• United States

• *United States Census Bureau

• *United States Office of Management and Budget

• **Combined Statistical Area

• **Core Based Statistical Area

• ***Metropolitan Statistical Area

• ***Micropolitan Statistical 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 Metropolitan Statistical Areas (MSA)

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

• **Table of United States primary census statistical areas (PCSA)