Global Definitions Database

Statistical area that consists of the county or counties or equivalent entities associated with at least one core (urbanized area or urban cluster) of at least 10,000 population, plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties associated with the core; represents a core area containing a substantial population nucleus, together with adjacent communities having a high degree of economic and social integration with that core; refers collectively to metropolitan statistical areas and micropolitan statistical areas.