List of regions of the United States
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Interstate regions
Official U.S. regions
Regions defined in law or regulations by the federal government.
Bureau of Reclamation Regions
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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
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U.S. Census Bureau regions
Regional divisions used by the United States Census Bureau
Standard Federal Regions
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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
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U.S. time zones
Main article: United States 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. regions
- Acadiana
- Appalachia
- Ark-La-Tex
- Border states
- The Carolinas
- Cascadia
- Champlain Valley
- Coastal States
- Continental United States
- Columbia River Basin
- The Dakotas
- Deep South
- Delmarva Peninsula
- Dixie
- Driftless Area
- East Coast
- Eastern Seaboard
- Four Corners
- Frontier Strip
- Great American Desert
- Great Basin
- Great Lakes Region
- Great North Woods
- Great Plains
- Great Valley
- Gulf Coast
- Gulf South
- Inland Empire
- Interior Plains
- Intermountain States
- International Border states
- Lake Tahoe
- Llano Estacado
- Mid-Atlantic
- Middle America
- Mississippi Delta
- Mojave Desert
- New England
- Ozarks
- Pacific Coast
- Pacific Northwest
- Palouse
- Piedmont
- The South
- Shenandoah Valley
- Southwest
- Southwest Extreme Triangle
- Trans-Appalachia
- Upper Midwest
- The Virginias
- West Coast
The "Belts"
Main article: "Belt" regions of the United States
Interstate metropolitan areas
- Baltimore-Washington Metropolitan Area
- Chicagoland
- Delaware Valley
- Illiana
- Michiana
- New York metropolitan area, the Tri-State Region
- Quad Cities
- South Florida metropolitan area
- Tri-Cities (Tennessee-Virginia)
- Cincinnati/Northern Kentucky metropolitan area
Interstate megalopolises
Intrastate regions
Alabama
Alaska
- Alaskan Bush
- Alaska Interior
- Alaska North Slope
- Alaska Panhandle
- Aleutian Islands
- South Central Alaska
- Tanana Valley
Arizona
Arkansas
- Ozarks
- Ouachita Mountains
- Mississippi Alluvial Plain
- Crowley's Ridge
- Arkansas River Valley
- Little Rock Metropolitan Area
- Memphis Metropolitan Area
California
- Sierra Nevada
- Owens Valley
- Central Valley
- Central Coast
- Northern California
- SanSan
- Southern California
- Channel Islands
Colorado
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
Delaware
Florida
- Central Florida
- Emerald Riviera
- First Coast
- Florida Keys
- Florida Panhandle
- Gold Coast
- Lee Island Coast
- Nature Coast
- South Florida
- Space Coast
- Sun Coast
- Tampa Bay Area
Georgia
- Central Savannah River Area (CSRA)
- Colonial Coast
- Georgia Mountains Region
- Historic South
- Inland Empire
- Metro Atlanta
- North Georgia
- Southern Rivers
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
- The Bluegrass
- Cumberland Plateau
- Northern Kentucky
- Pennyroyal Plateau
- The Purchase
- Western Coal Fields
Louisiana
Maine
Maryland
Massachusetts
- The Berkshires
- Cape Ann
- Cape Cod
- Greater Boston
- The Islands (includes Martha's Vineyard and Nantucket)
- Merrimack Valley
- North Shore
- Pioneer Valley
- South Shore
- Western Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
- Dartmouth-Lake Sunapee
- Golden Triangle
- Lakes Region
- Merrimack Valley
- Monadnock Region
- Seacoast Region
- White Mountains
New Jersey
New Mexico
New York
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Regions of New York as defined by the New York State Department of Economic Development
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
- Columbia River Gorge
- Eastern Oregon
- Harney Basin
- Mt. Hood Corridor
- Oregon Coast
- Rogue Valley
- Tualatin Valley
- Western Oregon
- Willamette Valley
Pennsylvania
- Coal Region
- Happy Valley
- Lehigh Valley
- Northern Tier
- Northwest Region
- Pennsylvania Dutch Country
- Pennsylvania Highlands
- The Poconos
- Susquehanna Valley
- Western Pennsylvania
Rhode Island
South Carolina
- Central Savannah River Area (CSRA)
- Grand Strand
- Historic Charleston
- Lake Murray Country
- The Lowcountry
- Metrolina
- Midlands
- Old 96 District
- Olde English District
- Pee Dee
- Santee Cooper Country
- Thoroughbred Country
- The Upstate
South Dakota
Tennessee
Texas
- Arklatex
- Big Bend
- Central Texas
- Dallas/Fort Worth Metroplex
- East Texas
- Edwards Plateau
- Galveston Bay
- The Hill Country
- Houston Metropolitan Area
- North Texas
- Northeast Texas
- Piney Woods
- Rio Grande Valley
- South Texas
- Southeast Texas
- Texas Panhandle
- Southeast Texas
- South Texas
- West Texas
Utah
- Canyonlands Desert
- Dixie
- Great Salt Lake Desert
- Uinta Mountains
- Wasatch Front
- Wasatch Back
- Wasatch Range
Vermont
Virginia
- Appomattox Basin
- Historic Triangle
- Middle Peninsula
- Northern Neck
- Northern Virginia (sometimes NoVA)
- Richmond-Petersburg (aka Central Virginia)
- South Hampton Roads
- Southside Virginia
- Tidewater
- Virginia Peninsula
Washington
- Central Washington
- Columbia Plateau
- Eastern Washington
- Kitsap Peninsula
- Okanogan Country
- Olympic Peninsula
- Puget Sound
- San Juan Islands
- Tri-Cities
- Western Washington
- Yakima Valley
West Virginia
Wisconsin
- Lake Superior Lowland
- Central Plain
- Eastern Ridges and Lowlands and Northern Highland (both part of the Niagara escarpment which outlines the Great Lakes)
- Western Upland (the Driftless Region)