Metropolitan Definitions

Metropolitan
Area
Definitions

Metropolitan areas are defined by the Office of Management and Budget. The following are links to their definitions.

Metropolitan Statistical Areas	There are 363 Metropolitan Statistical Areas which include 1,092 of the 3,141 counties in the United States as of January - 2008.
Micropolitan Statistical Areas	There are 577 Micropolitan Statistical Areas which include 694 of the 3,141 counties in the United States as of January - 2008.
Combined Statistical Areas	The definitions for the 124 Combined Statistical Areas. State maps are posted.
OLD - Metropolitan Areas	The definitions for the OLD 318 Metropolitan Areas in the United States and maps are posted.