List of regions of the United States

This list of regions of the United States includes official (governmental) and non-official areas within the borders of the United States, not including U.S. states, the federal district of Washington, D.C. or standard subentities such as cities or counties. Defunct, extinct or archaic regions are described in historic regions of the United States. (See also: U.S. regions)

Interstate regions

Official U.S. regions

Regions defined in law or regulations by the federal government.

Bureau of Reclamation Regions

The Bureau of Reclamation divides the western United States into five regions:

Great Plains Region - Billings, Montana
Lower Colorado Region - Boulder City, Nevada
Mid-Pacific Region - Sacramento, California
Pacific Northwest Region - Boise, Idaho
Upper Colorado Region - Salt Lake City, Utah

Census Bureau-designated areas

Regional divisions used by the United States Census Bureau

Region 1 (Northeast)
- Division 1 (New England)
- Division 2 (Middle Atlantic)
Region 2 (Central)
- Division 3 (East North Central)
- Division 4 (West North Central)
Region 3 (South)
- Division 5 (South Atlantic)
- Division 6 (East South Central)
- Division 7 (West South Central)
Region 4 (West)
- Division 8 (Mountain)
- Division 9 (Pacific)

Standard Federal Regions

The ten standard Federal Regions were established by OMB (Office of Management and Budget) Circular A-105, "Standard Federal Regions," in April, 1974, and required for all executive agencies. In recent years, some agencies have tailored their field structures to meet program needs and facilitate interaction with local, state and regional counterparts. The OMB must still approve any departures, however.

Region I: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont
Region II: New Jersey, New York, Puerto Rico, Virgin Islands
Region III: Delaware, Maryland, Pennsylvania, Virginia, West Virginia
Region IV: Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee
Region V: Illinois, Indiana, Michigan, Minnesota, Ohio, Wisconsin
Region VI: Arkansas, Louisiana, New Mexico, Texas, Oklahoma
Region VII: Iowa, Kansas, Missouri, Nebraska
Region VIII: Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming
Region IX: Arizona, California, Hawaii, Nevada (American Samoa, Guam, Northern Mariana Islands, Trust Territory of the Pacific Islands)
Region X: Alaska, Idaho, Oregon, Washington

Time Zones

Main article: United States time zones

Judicial circuits

As designated by Congress, the federal court system is divided into eleven judicial circuits, each with its own United States Court of Appeals. (There are also a District of Columbia Circuit and a Federal Circuit, both of which sit in Washington D.C. and have special, non-geographic jurisdictions.)

1^st Circuit (Courthouse in Boston, Massachusetts)
2^nd Circuit (Courthouse in New York, New York)
3^rd Circuit (Courthouse in Philadelphia, Pennsylvania)
4^th Circuit (Courthouse in Richmond, Virginia)
5^th Circuit (Courthouse in New Orleans, Louisiana)
6^th Circuit (Courthouse in Cincinnati, Ohio)
7^th Circuit (Courthouse in Chicago, Illinois)
8^th Circuit (Courthouse in St. Louis, Missouri)
9^th Circuit (meeting places vary from California to Alaska, but headquarters are in San Francisco, California)
10^th Circuit (Courthouse in Denver, Colorado)
11^th Circuit (Courthouse in Atlanta, Georgia)

Federal Reserve banks

The Federal Reserve Act of 1913 divided the country into twelve regions with a central Reserve Bank in each. The Federal Reserve Districts are as follows:

Unofficial U.S. regions

The "Belts"

Main article: "Belt" regions of the United States

Interstate metropolitan areas

Interstate megalopolises

Intrastate regions

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kansas

Kentucky

Louisiana

Acadiana (Cajun Country)

Maine

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

North Jersey

South Jersey
- Pine Barrens
- Delaware Valley

Jersey Shore
- Bayshore

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Grand Divisions

Each of the regions below is legally defined as a "Grand Division", with boundaries entrenched in the state's constitution. The document also has rules restricting geographic bias in the makeup of many state commissions. For example, the state's Supreme Court is required to sit in each of the three Grand Divisions each year, and no more than two of the Court's five Justices may reside in any one Grand Division.

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