county-equivalents United States Office of Management and Budget Statistical area (United States) Combined statistical area (list) Core-based statistical area (list) Metropolitan statistical area (list) Micropolitan statistical area (list) References External links US Census Metropolitan Statistical Area Delineations United States Government United States Census Bureau 2010 United States Census USCB population estimates United States Office of Management and Budget Federal Financial Institutions Examination Council Demographics of the United States 1949 establishments in the United States 1983 establishments in the United States 1983 introductions