The northwestern United States, also known as the American Northwest or simply the Northwest, is an informal geographic region of the United States
. The region consistently includes the states of Oregon
. Some sources include Southeast Alaska
in the Northwest. The related but distinct term "Pacific Northwest
" generally excludes areas from the Rockies eastward.
The Northwestern United States is a subportion of the Western United States
(which is, itself, even more ambiguous). In contrast, states included in the neighboring regions (Southwestern United States
and Great Plains
) 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
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, Spokane, Bellevue, Tacoma, Kennewick, Pasco, Yakima, Portland, Eugene, Salem, Boise, Idaho Falls, Missoula, Bozeman, and Billings.
As the United States' westward expansion
, the country's western border
also shifted westward, and consequently, so did the location of the Northwestern and Southwestern United States
. 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
. During the decades that followed, the Northwest Territory covered much of the Great Lakes region
east of the Mississippi River.
Centers of population
As of 2016, the Northwestern states have a cumulative population of 14,297,316, with Oregon
accounting for 77% of the entire five-state region's population. As of 2016, there are 25 metropolitan statistical area
s in the Northwest with populations of 100,000 or more, none of which are in Wyoming
. Since adjacent metropolitan areas often function as one combined agglomeration, the U.S. Census Bureau
additionally defines nine combined statistical area
s across the Northwest, eight of which having populations of 100,000 or more.
* Lavender, David. ''Land of Giants: The Drive to the Pacific Northwest, 1750- 1950'' (1958online
* Schwantes, Carlos. ''The Pacific Northwest: An Interpretive History'' (1996online
* Warren, Sidney. ''Farthest Frontier: The Pacific Northwest'' (1949online
* Winther, Oscar Osburn. ''The great northwest: a history'' (Greenwood Press
Category:Regions of the Western United States
Category:Geography of the Pacific Northwest