This is a list of some of the ways regions are defined in the United States. Many regions are defined in law or regulations by the federal government; others by shared culture and history, and others by economic factors.

Interstate regions

Census Bureau–designated regions and divisions

U.S. Census Bureau regions and divisions

Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions.[1][2] The Census Bureau region definition is "widely used ... for data collection and analysis",[3] and is the most commonly used classification system.[4][5][6][7]

Puerto Rico and other US territories are not part of any census region or census division.[9]

Federal Reserve Banks

Federal Reserve districts.

The Federal Reserve Act of 1913 divided the country into twelve districts with a central Federal Reserve Bank in each district. These twelve Federal Reserve Banks together form a major part of the Federal Reserve System, the central banking system of the United States. Missouri is the only U.S. state to have two Federal Reserve locations within its borders, but several other states are also divided between more than one district.

  1. Boston
  2. New York
  3. Philadelphia
  4. Cleveland
  5. Richmond
  6. Atlanta
  7. Chicago
  8. St. Louis
  9. Minneapolis
  10. Kansas City
  11. Dallas
  12. San Francisco

Time zones

Main article: Time in the United States

U.S. time zones. (Some U.S. time zones are not on this map.)

Courts of Appeals circuits

Main article: United States courts of appeals

U.S. Courts of Appeals circuits

The Federal Circuit is not a regional circuit. Its jurisdiction is nationwide but based on the subject matter.

Agency administrative regions

In 1969, the Office of Management and Budget published a list of ten "Standard Federal Regions",[11] to which Federal agencies could be restructured as a means of standardizing government administration nationwide. Despite a finding in 1977 that this restructuring did not reduce administrative costs as initially expected,[12] and the complete rescinding of the standard region system in 1995,[13] several agencies continue to follow the system, including the Environmental Protection Agency[14] and the Department of Housing and Urban Development.[15]

Regions and office locations

Regions of the U.S. EPA
Region I

Office location: Boston

States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont

Region II

Office location: New York City

States: New York, New Jersey, Puerto Rico, and the Virgin Islands

Region III

Office location: Philadelphia

States: Delaware, District of Columbia, Maryland, Pennsylvania, Virginia, and West Virginia

Region IV

Office location: Atlanta

States: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee

Region V

Office location: Chicago

States: Illinois, Indiana, Minnesota, Michigan, Ohio, and Wisconsin

Region VI

Office location: Dallas

States: Arkansas, Louisiana, New Mexico, Oklahoma, and Texas

Region VII

Office location: Kansas City

States: Iowa, Kansas, Missouri, and Nebraska

Region VIII

Office location: Denver

States: Colorado, Montana, North Dakota, South Dakota, Utah, and Wyoming

Region IX

Office location: San Francisco

States: Arizona, California, Hawaii, Nevada, Guam, and American Samoa

Region X

Office location: Seattle

States: Alaska, Idaho, Oregon, and Washington

Bureau of Economic Analysis regions

Bureau of Economic Analysis regions

The Bureau of Economic Analysis defines regions for comparison of economic data.[16]

Unofficial regions

Multi-state regions

Multi-territory regions

The Belts

For a more comprehensive list, see List of belt regions of the United States.

Interstate megalopolises

See also: Megaregions of the United States

Further information: Megalopolis

Interstate metropolitan areas

See also: Tri-state area

Intrastate and intraterritory regions


A map of Alabama regions.


The Alaska Panhandle

American Samoa

American Samoa


For a more comprehensive list, see List of regions of Arizona.

The Arizona Strip


Regions of Arkansas


For a more comprehensive list, see List of regions of California.


Main article: Geography of Colorado

An enlargeable map of the Front Range Urban Corridor of Colorado and Wyoming.


For a more comprehensive list, see Councils of governments in Connecticut.

Map highlighting the 9 official regions of Connecticut

Connecticut has 9 official planning regions. These regions operate as councils of governments, and are recognized as county equivalents by the U.S. Census Bureau.

Some of Connecticut's informal regions include:


The Delaware Valley

"Upstate" or "Up North"

"Slower Lower"

District of Columbia

Main article: Neighborhoods in Washington, D.C.


For a more comprehensive list, see List of regions of Florida.

The First Coast
The Florida Panhandle

Directional regions

Local vernacular regions


Physiographic regions


Hawaiian archipelago
Main Hawaiian Islands



The Idaho Panhandle


Main article: Regions of Illinois

Southern Illinois is also known as "Little Egypt".


Main article: Geography of Indiana

Regions of Indiana


Regions of Iowa.




A map of Louisiana's regions



Maryland's regions

Regions shared with other states:


The Berkshire region of Massachusetts


Main article: Geography of Michigan

Michigan's regions

Lower Peninsula

Main article: Lower Peninsula of Michigan

Upper Peninsula

Main article: Upper Peninsula of Michigan


Main article: Geography of Minnesota

Regions of Minnesota



The Missouri Bootheel


For a more comprehensive list, see List of regions of Montana.


The Nebraska Panhandle


New Hampshire

New Jersey

New Mexico

New York

Regions of New York as defined by the New York State Department of Economic Development.
1. Western New Yorkcounties: Niagara, Erie, Chautauqua, Cattaraugus, Allegany
2. Finger Lakescounties: Orleans, Genesee, Wyoming, Monroe, Livingston, Wayne, Ontario, Yates, Seneca
3. Southern Tiercounties: Steuben, Schuyler, Chemung, Tompkins, Tioga, Chenango, Broome, Delaware
4. Central New Yorkcounties: Cortland, Cayuga, Onondaga, Oswego, Madison
5. North Countrycounties : St. Lawrence, Lewis, Jefferson, Hamilton, Essex, Clinton, Franklin
6. Mohawk Valleycounties: Oneida, Herkimer, Fulton, Montgomery, Otsego, Schoharie
7. Capital Districtcounties : Albany, Columbia, Greene, Warren, Washington, Saratoga, Schenectady, Rensselaer
8. Hudson Valleycounties: Sullivan, Ulster, Dutchess, Orange, Putnam, Rockland, Westchester
9. New York Citycounties (boroughs): New York (Manhattan), Bronx (The Bronx), Queens (Queens), Kings (Brooklyn), Richmond (Staten Island)
10. Long Islandcounties: Nassau, Suffolk

North Carolina

Regions of North Carolina.

North Dakota

Northern Mariana Islands

Northern Mariana Islands


  The area roughly covered by the Great Black Swamp


The Oklahoma Panhandle


Main article: List of regions of Oregon

Oregon's topography
Oregon's High Desert


Main article: Regions of Pennsylvania

Puerto Rico

Puerto Rico

Rhode Island

South Carolina

South Dakota

South Dakota
East River and West River


Main article: Grand Divisions of Tennessee


Main article: List of geographical regions in Texas

The Texas Panhandle

U.S. Minor Outlying Islands

The United States Minor Outlying Islands (Navassa Island not on map)

U.S. Virgin Islands




A map of the Shenandoah Valley


West Virginia


Wisconsin's five geographic regions

Wisconsin can be divided into five geographic regions.


See also

Explanatory notes

  1. ^ This region also includes the Independent State of Samoa, which is not a part of the United States
  2. ^ This region also includes the British Virgin Islands, which is not a part of the United States
  3. ^ Claimed by Tokelau[17]
  4. ^ Midway Atoll, part of the Northwest Hawaiian Islands, is not politically part of Hawaii; it is one of the United States Minor Outlying Islands
  5. ^ Claimed by Haiti
  6. ^ Claimed by the Marshall Islands


  1. ^ "Statistical Groupings of States and Counties" (PDF). United States Census Bureau. Retrieved December 16, 2020.
  2. ^ United States Census Bureau, Geography Division. "Census Regions and Divisions of the United States" (PDF). Retrieved January 10, 2013.
  3. ^ "The National Energy Modeling System: An Overview 2003" (Report #: DOE/EIA-0581, October 2009). United States Department of Energy, Energy Information Administration.
  4. ^ "The most widely used regional definitions and follow those of the U.S. Bureau of the Census." Seymour Sudman and Norman M. Bradburn, Asking Questions: A Practical Guide to Questionnaire Design (1982). Jossey-Bass: p. 205.
  5. ^ "Perhaps the most widely used regional classification system is one developed by the U.S. Census Bureau." Dale M. Lewison, Retailing, Prentice Hall (1997): p. 384. ISBN 978-0-13-461427-4
  6. ^ "[M]ost demographic and food consumption data are presented in this four-region format." Pamela Goyan Kittler, Kathryn P. Sucher, Food and Culture, Cengage Learning (2008): p.475. ISBN 9780495115410
  7. ^ "Census Bureau Regions and Divisions with State FIPS Codes" (PDF). US Census Bureau. Archived from the original (PDF) on September 21, 2013. Retrieved June 20, 2010.
  8. ^ "Census Bureau Regions and Divisions with State FIPS Codes" (PDF). US Census Bureau. Archived from the original (PDF) on September 21, 2013. Retrieved June 20, 2010.
  9. ^ "Geographic Terms and Concepts - Census Divisions and Census Regions". US Census Bureau. Retrieved August 19, 2015.
  10. ^ "No DST in Most of Arizona". Retrieved August 14, 2020.
  11. ^ Standard Federal Regions, Office of Management and Budget, 1969, Circular A-105
  12. ^ Office of Management and Budget (August 17, 1977), Standardized Federal Regions: Little Effect on Agency Management of Personnel, Government Accountability Office, FPCD-77-39
  13. ^ 60 FR 15171
  14. ^ Williams, Dennis C. (March 1993), Why Are Our Regional Offices and Labs Located Where They Are? A Historical Perspective on Siting, U.S. Environmental Protection Agency
  15. ^ HUD's Regions, U.S. Department of Housing and Urban Development, September 20, 2017
  16. ^ "BEA Regions". Bureau of Economic Analysis. February 18, 2004. Retrieved December 27, 2012.
  17. ^ The World Factbook CIA World Factbook - American Samoa. Retrieved July 5, 2019.