Washington County
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, making it the second most populous county in the state and the most populous "Washington County" in the United States. Hillsboro is the county seat and largest city, while other major cities include Beaverton, Tigard, Cornelius, Banks, Gaston, Sherwood, North Plains, and Forest Grove, the county's oldest city. Originally named Twality when created in 1843, the Oregon Territorial Legislature renamed it for the nation's first president in 1849 and included the entire northwest corner of Oregon before new counties were created in 1854. The Tualatin River and its drainage basin lie almost entirely within the county, which shares its boundaries with the Tualatin Valley. It is bordered on the west and north by the Northern Oregon Coast Range, on the south by the Chehalem Mountains, and on the north and east by the Tualatin Mountains, or West Hills.
Governance bodies
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Cities and towns 12
- City of Banks pop. 1,829
- City of Beaverton pop. 98,216
- City of Cornelius pop. 13,416
- City of Durham pop. 1,916
- City of Forest Grove pop. 26,089
- City of Gaston pop. 676
- City of Hillsboro pop. 106,633
- City of King City pop. 5,105
- City of North Plains pop. 3,424
- City of Sherwood pop. 20,254
- City of Tigard pop. 55,767
- City of Tualatin pop. 27,537
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 173624
- FIPS state
- 41
- FIPS county
- 067
- FIPS place
- 99067
- Census record name
- COUNTY OF WASHINGTON
- Mailing address
- 155 N 1ST AVE, HILLSBORO 97124