page_title: Northwestern United States
section_title: Centers of population
hierarchical_section_title: Northwestern United States / Centers of population
caption_attribution_description: English: Cropped image of File:Seattleskyline1.jpg, intended for use in en:List of tallest buildings and structures in Seattle to focus only on the skyline. Original image taken by en:User:CMLLovesDegus on 24 February 2006. The licensing tag found on its Wikimedia Commons description page is also shown here:
context_page_description: 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, Washington, Idaho, Montana and Wyoming. 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. In contrast, states included in the neighboring regions 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. 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.
context_section_description: As of 2016, the Northwestern states have a cumulative population of 14,297,316, with Oregon and Washington accounting for 77% of the entire five-state region's population. As of 2016, there are 25 metropolitan statistical areas 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 areas across the Northwest, eight of which having populations of 100,000 or more.
caption: Seattle, the largest metropolitan area in the Northwest
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