The State of New Mexico has a total of four metropolitan statistical areas (MSAs) that are fully or partially located in the state. 7 of the state's 33 counties are classified by the United States Census Bureau as metropolitan. As of the 2000 census, these counties had a combined population 1,147,424 (63.1% of the state's total population). Based on a July 1, 2009 population estimate, that figure rose to 1,335,985 (66.5% of the state's total population).
The United States Census Bureau defines a Combined Statistical Area (CSA) as an aggregate of adjacent Core Based Statistical Areas (CBSAs) that are linked by commuting ties. There are three combined statistical areas in New Mexico, with one crossing into Texas.