The Northwestern United States, also known as the American Northwest or simply the Northwest, is an informal geographic region of the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...

. The region consistently includes the states of

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

Washington Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered o ...

Idaho Idaho ( ) is a U.S. state, state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Monta ...

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columb ...

and

Wyoming Wyoming () is a state in the Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the southwest, and Colorado to t ...

. Some sources include

Southeast Alaska Southeast Alaska, colloquially referred to as the Alaska(n) Panhandle, is the southeastern portion of the U.S. state of Alaska, bordered to the east and north by the northern half of the Canadian province of British Columbia (and a small part ...

in the Northwest. The related but distinct term "

Pacific Northwest The Pacific Northwest (sometimes Cascadia, or simply abbreviated as PNW) is a geographic region in western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Thou ...

" generally excludes areas from the Rockies eastward, whereas the term " Inland Northwest" excludes areas east of the Cascades. The Northwestern United States is a subportion of the

Western United States The Western United States (also called the American West, the Far West, and the West) is the region comprising the westernmost states of the United States. As American settlement in the U.S. expanded westward, the meaning of the term ''the We ...

(which is, itself, even more ambiguous). In contrast, states included in the neighboring regions (

Southwestern United States The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural region of the United States that generally includes Arizona, New Mexico, and adjacent portions of California, Colorado, N ...

and

Great Plains The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, a ...

) and Utah are not simultaneously considered part of both regions. Like the southwestern United States, the Northwest definition has moved westward over time. The current area includes the old Oregon Territory (created in 1848–Oregon, Washington, Idaho, and areas in Montana west of the

Continental Divide A continental divide is a drainage divide on a continent such that the drainage basin on one side of the divide feeds into one ocean or sea, and the basin on the other side either feeds into a different ocean or sea, or else is endorheic, not c ...

). The region is similar to Federal Region X, which comprises Oregon, Washington, Idaho, and Alaska. It is home to over 14.2 million people. Some of the fastest growing cities in this region and in the nation include

Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest region o ...

, Spokane, Bellevue, Tacoma, Kennewick, Pasco, Yakima, Portland, Eugene, Salem, Boise, Idaho Falls, Missoula,

Bozeman Bozeman is a city and the county seat of Gallatin County, Montana, United States. Located in southwest Montana, the 2020 census put Bozeman's population at 53,293, making it the fourth-largest city in Montana. It is the principal city of ...

, and

Billings Billings is the largest city in the U.S. state of Montana, with a population of 117,116 as of the 2020 census. Located in the south-central portion of the state, it is the seat of Yellowstone County and the principal city of the Billings Metro ...

Etymology

As the United States' westward expansion, the country's western border also shifted westward, and consequently, so did the location of the Northwestern and

. In the early years of the United States, newly colonized lands lying immediately west of the Allegheny Mountains were detached from Virginia and given the name

Northwest Territory The Northwest Territory, also known as the Old Northwest and formally known as the Territory Northwest of the River Ohio, was formed from unorganized western territory of the United States after the American Revolutionary War. Established in 1 ...

. During the decades that followed, the Northwest Territory covered much of the

Great Lakes region The Great Lakes region of North America is a binational Canadian–American region that includes portions of the eight U.S. states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania and Wisconsin along with the Canadian p ...

east of the Mississippi River.

Centers of population

As of 2016, the Northwestern states have a cumulative population of 14,297,316, with

and

accounting for 77% of the entire five-state region's population. As of 2016, there are 25

metropolitan statistical area In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally incorporated as a city or tow ...

s in the Northwest with populations of 100,000 or more, none of which are in

. Since adjacent metropolitan areas often function as one combined agglomeration, the

U.S. Census Bureau The United States Census Bureau (USCB), officially the Bureau of the Census, is a principal agency of the U.S. Federal Statistical System, responsible for producing data about the American people and economy. The Census Bureau is part of the ...

additionally defines nine

combined statistical area Combined statistical area (CSA) is a United States Office of Management and Budget (OMB) term for a combination of adjacent metropolitan statistical area, metropolitan (MSA) and micropolitan statistical areas (µSA) across the 50 US states and ...

s across the Northwest, eight of which having populations of 100,000 or more.

Etymology

Centers of population

Presidential elections

References

Further reading