What are metropolitan areas?
The Office of Management and Budget (OMB) defines metropolitan and micropolitan areas. Currently defined metropolitan and micropolitan areas are based on the application of the 2000 standards (which appeared in the Federal Register, December 27, 2000, pages 82228-82238) to data from the 2000 Census, as updated using more recent population estimates from the Census Bureau. The metropolitan and micropolitan area definitions currently used by the LAUS program reflect the contents of OMB Bulletin No. 04-03, dated February 18, 2004. Metropolitan and micropolitan areas consist of one or more counties. OMB defined a conceptually similar set of areas in New England using cities and towns as the geographic building blocks, referred to as New England City and Town Areas (NECTAs). The LAUS program uses these NECTAs as an alternative to the county-based metropolitan and micropolitan areas in the six New England states. As of February 18, 2004, there are 367 metropolitan areas and 582 micropolitan