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: )
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 (Midwest)
- 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)
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
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.)
- 1st Circuit (Courthouse in Boston, Massachusetts)
- 2nd Circuit (Courthouse in New York, New York)
- 3rd Circuit (Courthouse in Philadelphia, Pennsylvania)
- 4th Circuit (Courthouse in Richmond, Virginia)
- 5th Circuit (Courthouse in New Orleans, Louisiana)
- 6th Circuit (Courthouse in Cincinnati, Ohio)
- 7th Circuit (Courthouse in Chicago, Illinois)
- 8th Circuit (Courthouse in St. Louis, Missouri)
- 9th Circuit (meeting places vary from California to Alaska, but headquarters are in San Francisco, California)
- 10th Circuit (Courthouse in Denver, Colorado)
- 11th 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:
- Boston
- New York
- Philadelphia
- Cleveland
- Richmond
- Atlanta
- Chicago
- St Louis
- Minneapolis
- Kansas City
- Dallas
- San Francisco
Time Zones
- Hawaii-Aleutian Standard Time Zone
- Alaska Standard Time Zone
- Pacific Standard Time Zone
- Mountain Standard Time Zone
- Central Standard Time Zone
- Eastern Standard Time Zone
Unofficial U.S. multi-state regions
- Appalachia
- American West
- Ark-La-Tex
- Atlantic Seaboard
- Bible Belt
- Blackstone River Valley
- Border states:
- The Carolinas
- Cascadia
- Central United States
- Champlain Valley
- Coastal States
- Colorado Plateau
- Continental United States
- Columbia River Basin
- The Dakotas
- Deep South
- Delmarva Peninsula
- Dixie
- Driftless Zone
- East Coast
- Eastern Seaboard
- Eastern United States
- Ecotopia
- Four Corners
- Frontier Strip
- Great American Desert
- Great Basin
- Great Lakes Region
- Great North Woods
- Great Plains
- Great Valley
- Gulf Coast
- Gulf South
- High Plains
- Inland Empire (Pacific Northwest)
- Interior Plains
- Intermountain States
- International Border states
- Lake Tahoe
- Llano Estacado
- Mid-Atlantic
- Middle America
- The Midwest
- Mississippi Delta
- Mississippi Valley
- Mojave Desert
- Mountain states
- New England
- Ohio Valley
- Ozarks
- Pacific States
- Pacific Northwest
- Palouse
- Piedmont
- Piney Woods
- Shawnee Hills
- Shenandoah Valley
- Siouxland
- Southeastern United States
- Southwest
- Southwest Extreme Triangle
- Susquehanna Valley
- Suwanee River Valley
- Tennessee Valley
- Trans-Appalachia
- Upland South
- Upper Midwest
- The Virginias
- Waxhaws
- West Coast
- Western United States
The "Belts"
Main article: "Belt" regions of the United States
Interstate metropolitan areas
- Augusta-Aiken Metropolitan Area
- Baltimore-Washington Metropolitan Area
- Charlotte Metropolitan Area
- Chicago Metropolitan Area
- Evansville-Henderson Metropolitan Area
- Cincinnati/Northern Kentucky Metropolitan Area
- Delaware Valley
- Kansas City Metropolitan Area
- Louisville Metropolitan Area
- Memphis Metropolitan Area
- Michiana
- Minneapolis-Saint Paul
- National Capital Region
- New York Metropolitan Area, the Tri-State Region
- Omaha-Council Bluffs Metropolitan Area
- Portland Metropolitan Area
- Quad Cities
- Sacramento-Arden-Arcade-Yuba City
- Southeastern New England
- St. Louis Metropolitan Area
- Tri-Cities (Tennessee-Virginia)
- Twin Ports (Duluth, Minnesota-Superior, Wisconsin)
Interstate megalopolies
Intrastate regions
Alabama
- Greater Birmingham
- Black Belt
- Central Alabama
- Alabama Gulf Coast
- Lower Alabama
- Mobile Bay
- North Alabama
- Northeast Alabama
- South Alabama
Alaska
- Arctic Alaska
- Alaskan Bush
- Alaska Interior
- Alaska North Slope
- Alaska Panhandle
- Aleutian Islands
- Kenai Peninsula
- Seward Peninsula
- South Central Alaska
- Southeast Alaska
- Southwest Alaska
- Tanana Valley
Arizona
- Arizona Strip (map, pictured right)
- Grand Canyon
- North Central Arizona
- Northeast Arizona
- Northern Arizona
- Phoenix metropolitan area
- Southern Arizona
Arkansas
- Ozarks
- Ouachita Mountains
- Arkansas Delta
- Western Arkansas
- West Gulf Coastal Plain
- Crowley's Ridge
- Arkansas River Valley
- Little Rock Metropolitan Area
California
- North Coast
- Sierra Nevada
- Owens Valley
- Central Valley
- Central Coast
- Northern California
- SanSan
- Southern California
- Channel Islands
Colorado
- Central Colorado
- The Eastern Plains
- Colorado Mineral Belt
- The Front Range
- Denver-Aurora Metropolitan Area
- The High Rockies
- San Luis Valley
- The Western Slope
- Northwestern Colorado
- South-Central Colorado
- Southwestern Colorado
Connecticut
- Coastal Connecticut
- Connecticut Panhandle
- Inland Connecticut
- New York Metropolitan Area/Gold Coast
- Litchfield Hills
- Naugatuck River Valley
- Greater New Haven
- Greater Hartford
- Lower Connecticut River Valley
- Quiet Corner
- Southeastern Connecticut
- Southwestern Connecticut
Delaware
- Delaware Coast
- Delaware Valley
- Cape Region
Florida
- Big Bend
- Central Florida
- Everglades
- First Coast
- Florida Heartland
- Florida Keys
- Florida Panhandle
- JaMi (urban region)
- Nature Coast
- North Central Florida
- South Florida
- Southwest Florida
- Space Coast
- Florida Sun Coast
- Tampa Bay Area
- Treasure Coast
Georgia
- Central Savannah River Area
- Colonial Coast
- Georgia Mountains Region
- The Golden Isles of Georgia
- Historic South
- Inland Empire
- Metro Atlanta
- Southern Rivers
Hawaii
- Hawaii / Big Island
- Kahoolawe
- Kauai
- Lānai
- Maui
- Molokai
- Niihau
- Northwestern Hawaiian Islands
- Oahu
- Tahua
Idaho
Illinois
- Chicagoland
- Champaign-Urbana Metropolitan Area
- Central Illinois
- Little Egypt
- Fox Valley
- Metro-East
- American Bottom
- The Tract
- Northwestern Illinois
- Southern Illinois
Indiana
- East Central Indiana
- Michiana
- Nine-County Region
- Northern Indiana
- Northwest Indiana
- Southern Indiana
- Southwestern Indiana
- Wabash Valley
Iowa
- Iowa Great Lakes
- Loess Hills
- Quad Cities
- East-Central Iowa
- Eastern Iowa
- Great River Road
- Western Iowa
Kansas
Kentucky
- The Bluegrass
- Central Kentucky
- Cumberland Plateau
- Eastern Mountain Coal Fields
- The Knobs
- Northern Kentucky
- Pennyroyal Plateau
- The Purchase
- Western Coal Fields
Louisiana
- Central Louisiana (Cen-La)
- Florida Parishes
- French Louisiana (Acadiana + Greater New Orleans)
- Greater New Orleans
- North Louisiana
Maine
- Acadia
- Down East
- High Peaks
- Maine Highlands
- Maine North Woods
- Maine Southern Coast
- Mid Coast
- Penobscot Bay
- Western Maine Mountains / Maine Lake Country
Maryland
- Baltimore-Washington Metropolitan Area
- Chesapeake Bay
- Maryland Eastern Shore
- Southern Maryland
- Western Maryland
- Capital Region
Massachusetts
- The Berkshires (map shown, right)
- Cape Ann
- Cape Cod
- Central Massachusetts
- Greater Boston
- The Islands (includes Martha's Vineyard and Nantucket)
- Merrimack Valley
- MetroWest
- North Shore
- Pioneer Valley
- South Coast
- South Shore
- Western Massachusetts
Michigan
Minnesota
- Arrowhead Region
- Boundary Waters
- Buffalo Ridge
- Central Minnesota
- Coulee Region
- Iron Range
- Minnesota River Valley
- North Shore
- Northwest Angle
- Pipestone Region
- Red River Valley
- Southeast Minnesota
- Twin Cities Metro
Mississippi
- Golden Triangle
- Mississippi Plain
- Mississippi Delta
- Mississippi Gulf Coast
- Natchez District
- Pine Belt
- Tennessee Valley
Missouri
Montana
- Bighorn Country
- Eastern Montana
- The Flathead
- Glacier National Park
- South Central Montana
- Southwestern Montana
- Western Montana
Nebraska
- Nebraska Panhandle
- Northwest Nebraska
- Pine Ridge
- Rainwater Basin
- Sandhills
- Southeast Nebraska
- Wildcat Hills
Nevada
New Hampshire
- Merrimack Valley (Golden Triangle)
- Souhegan Valley
- Seacoast Region
- Monadnock Region
- Dartmouth-Lake Sunapee
- Lakes Region
- White Mountains
- Great North Woods
- Western New Hampshire
- Central New Hampshire
New Jersey
New Mexico
- Central New Mexico
- New Mexico Bootheel
- Eastern New Mexico
- Northern New Mexico
New York
- Downstate New York
- Upstate New York
North Carolina
- Mountains
- Piedmont
- Piedmont Crescent
- Metrolina (Metro Charlotte)
- Piedmont Triad
- Research Triangle (The Triangle)
- Coast
North Dakota
- Badlands
- Missouri Escarpment
- Missouri River Corridor
- Red River Valley
Ohio
- Connecticut Western Reserve (historic, now defunct)
- Extreme Northwest Ohio
- Great Black Swamp (shared with Indiana)
- Greater Cincinnati
- Greater Cleveland
- The Lake Erie Islands
- Miami Valley
- Northeast Ohio
- Northwest Ohio
- Southeast Ohio
Oklahoma
- Arbuckle Country
- Central Oklahoma
- Cherokee Outlet
- Green Country
- Little Dixie
- Northeastern Oklahoma
- Northwestern Oklahoma
- Southeastern Oklahoma
- Southwestern Oklahoma
- Panhandle (pictured)
Oregon
- The Cascades
- Central Oregon
- Columbia River Gorge
- Columbia River Plateau
- Columbia River
- Eastern Oregon
- Harney Basin
- Inland Empire
- Mount Hood Corridor
- Oregon Coast
- Palouse
- Portland Metro
- Rogue Valley
- Southern Oregon
- Treasure Valley
- Tualatin Valley
- Western Oregon
- Willamette Valley
Pennsylvania
- Allegheny National Forest
- Coal Region
- Cumberland Valley
- Delaware Valley
- Dutch Country
- Endless Mountains
- Happy Valley
- Pennsylvania Highlands
- Laurel Highlands
- Lehigh Valley
- Northern Tier
- Northeastern Pennsylvania
- Northwest Region
- Pittsburgh Metro Area
- The Poconos
- Susquehanna Valley
- Wyoming Valley
- Western Pennsylvania
Rhode Island
South Carolina
Major Regions
Travel/Tourism Regions
- Grand Strand
- Historic Charleston
- The Lowcountry & Resort Islands
- Lake Murray Country
- Old 96 District
- Olde English District
- Pee Dee
- Santee Cooper Country
- Thoroughbred Country
- The Upcountry
Other Regions
- Blue Ridge Mountains
- The Piedmont
- The Sandhills
- South Carolina Coast
- Sea Islands
- Metrolina
South Dakota
Tennessee
Grand Divisions
Geographic Divisions
Texas
- Brazos Valley
- Central Texas
- Blackland Prairies
- The Hill Country
- Gulf Coast
- East Texas
- North Texas
- Northeast Texas
- Piney Woods
- Rio Grande Valley
- South Texas
- Mission Country
- Rio Grande Valley
- South Plains
- Southeast Texas
- Texas Urban Triangle
- West Texas
Utah
- Cache Valley
- Canyonlands Desert
- Colorado Plateau
- Dixie
- Great Salt Lake Desert
- Mojave Desert
- Southeastern Utah
- Southwestern Utah
- Uinta Mountains
- Wasatch Front
- Wasatch Back
- Wasatch Range
Vermont
Virginia
- Appomattox Basin
- Eastern Shore
- Hampton Roads
- Historic Triangle
- Middle Peninsula
- New River Valley
- Northern Neck
- Northern Virginia (sometimes NoVA)
- Richmond-Petersburg (aka Central Virginia)
- Shenandoah Valley
- South Hampton Roads
- Southside Virginia
- Southwest Virginia
- Tidewater
- Virginia Peninsula
Washington
- Central Washington
- Columbia Plateau
- Eastern Washington
- Kitsap Peninsula
- Long Beach Peninsula
- Okanogan County
- Olympic Peninsula
- Puget Sound
- San Juan Islands
- Skagit Valley
- Tri-Cities
- Walla Walla Valley
- Western Washington
- Yakima Valley
West Virginia
Wisconsin
- Central Plain
- Door Peninsula
- Eastern Ridges and Lowlands
- Lake Superior Lowland
- Northern Highland
- Western Upland
Wyoming
See also
- Historic regions of the United States
- Geography of the United States
- Political divisions of the United States
- United States territory
- United States metropolitan area
- Nine Nations of North America
- List of regions of Canada

