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English: This is a locator map showing Washington County in Oregon. For more information, see Commons:United States county locator maps. Date: 12 February 2006:
Washington County is one of 36 counties in the U.S. state of Oregon and part of the Portland metropolitan area. The 2020 census recorded the population as 600,372, [ 1 ] making it the second most populous county in the state and the most populous " Washington County " in the United States.
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Washington County: 067: Hillsboro: 1843: One of the original four districts of the Oregon Country (as Twality District) Named for president George Washington. 598,865: 724 sq mi (1,875 km 2) Wheeler County: 069: Fossil: 1899: Grant County, Gilliam County, and Crook County: Named for Henry H. Wheeler, an early Oregon mail carrier. 1,436: 1,715 ...
The valley is formed by the meandering Tualatin River, a tributary of the Willamette River at the northwest corner of the Willamette Valley, east of the Northern Oregon Coast Range. Most of the valley is located within Washington County, separated from Portland by the Tualatin Mountains.
An enlargeable map of the state of Oregon. ... National Register of Historic Places listings in Washington County, Oregon; ... Oregon boundary dispute, ...
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Northwest Oregon is a geographic and cultural region of the U.S. state of Oregon, composed of Clatsop, Columbia, and Tillamook counties. [1] The region encompasses the northernmost parts of the state along the lower Columbia River .