Many regions in the United States are defined in law or regulations by the federal government.
Census Bureau-designated regions and divisions
U.S. Census Bureau Regions and Divisions. The United States Census Bureau defines four statistical regions, with nine divisions.[1] The Census Bureau region definition is "widely used... for data collection and analysis," and is the most commonly used classification system.
Regional divisions used by the United States Census Bureau:
Region 1: Northeast
• Division 1: New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont)
• Division 2: Mid-Atlantic (New Jersey, New York, and Pennsylvania)
Region 2: Midwest (Prior to June 1984, the Midwest Region was designated as the North Central Region.)
• Division 3: East North Central (Illinois, Indiana, Michigan, Ohio, and Wisconsin)
• Division 4: West North Central (Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota)
Region 3: South
• Division 5: South Atlantic (Delaware, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, Washington D.C., and West Virginia)
• Division 6: East South Central (Alabama, Kentucky, Mississippi, and Tennessee)
• Division 7: West South Central (Arkansas, Louisiana, Oklahoma, and Texas)
Region 4: West
• Division 8: Mountain (Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming)
• Division 9: Pacific (Alaska, California, Hawaii, Oregon, and Washington)
Puerto Rico and other US territories are not part of any census region or census division.
