Washington County, Oregon

Washington County: County in Oregon, United States

About

Washington County is a county located in the U.S. state of Oregon. As of the 2010 census, the population was 529,710 and a population density of 282 people per km². After 10 years in 2020 county had an estimated population of 603,514 inhabitants. Its county seat is Hillsboro. The county was created 181 years ago in 1842.

Washington County locator map
Location of Washington County on Oregon map.

Quick Facts about Washington County

Population : 603,514 (2020)
Country : United States of America
State : Oregon (United States)
Different from : Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington County, Washington Parish, Washington County, Washington County, Washington County, Washington County, Washington County
Area : 1880 km2
Water as percent of area : 0.3%
Land as percent of area : 99.7%
Named for : George Washington
Capital : Hillsboro
Establishment : January 01, 1843
Time Zone : America/Los_Angeles
Local time : 04:53:22 (21st December 2024)
Density : 321 Pop. per km² as of 2020
Population growth : 12.23% (2010-2020)
Washington County Courthouse 'Washington County Oregon scenic images' 'washD0007' image
Washington County Courthouse 'Washington County Oregon scenic images' 'washD0007'
Washington County Courthouse 'Washington County Oregon scenic images' 'washD0007' image
Washington County Courthouse 'Washington County Oregon scenic images' 'washD0007' image

Geography

Washington County is located at 45°33'36"N 123°5'55"W (45.5600700, -123.0984900). It has 6 neighbors: Columbia County, Clackamas County, Clatsop County, Multnomah County, Tillamook County and Yamhill County.

Washington County map

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The largest city of Washington County is Hillsboro with a population of 110,985. Other cities include, Beaverton population 98,957, Tigard population 56,049, Aloha population 49,425 and Tualatin population 27,481. See all Washington County cities & populated places.

Washington County Populated Places (more)

Cities, towns, neighborhoods & other populated places in Washington County.

City Name Population Title
Hillsboro 110,985 The most populous city in Washington County, Oregon.
Beaverton 98,957 The most populous city in Washington County, Oregon.
Tigard 56,049 The most populous city in Washington County, Oregon.
Aloha 49,425 A city in Clackamas County, Oregon.
Tualatin 27,481 City in Oregon, USA
Forest Grove 25,442 City in Oregon, USA
Bethany 20,646 Unincorporated community in Washington County, Oregon, United States
Sherwood 19,746 City in Oregon, USA
Cedar Mill 14,546 Unincorporated community in Washington County, Oregon
Cornelius 13,116 City in Oregon, USA
Oak Hills 11,333 Census-designated place in Washington County, Oregon, United States
Rockcreek 9,316 Unincorporated community in Oregon
Cedar Hills 8,300 City in Utah County, Utah, United States
West Slope 6,554 Unincorporated suburb of Portland, in Washington County, Oregon, U.
Raleigh Hills 5,896 Census-designated neighborhood in Washington County, Oregon, United States
King City 4,408 City in Oregon, USA

Washington County has 6 neighbours.

  • Rivergrove
  • Wilsonville
  • North Plains
  • Tualatin
  • King City
  • Durham
  • Gaston
  • Aloha
  • Forest Grove
  • Bethany
  • West Slope
  • Raleigh Hills
  • Portland
  • Tigard
  • Banks
  • Bull Mountain
  • Sherwood
  • Beaverton
  • Cornelius
  • Hillsboro
  • Rockcreek
  • Cedar Mill
  • West Haven-Sylvan
  • Metzger
  • Cedar Hills
  • Garden Home-Whitford
  • Oak Hills
  • Lake Oswego

Demographics

The population of Washington County increased by 12.23% in 10 years.

Year Population % Change Method
2010 529,710 - census
2011 540,967 2.08% estimation process
2012 548,524 1.38% estimation process
2013 555,264 1.21% estimation process
2014 562,316 1.25% estimation process
2015 572,664 1.81% estimation process
2016 584,910 2.09% estimation process
2017 591,336 1.09% estimation process
2018 596,904 0.93% estimation process
2019 601,592 0.78% estimation process
2020 603,514 0.32% estimation process

Comitatul Washington, Comte de Washington, Comté de Washington, Condado de Washington, Condado han Washington, Contea di Washington, Hrabstwo Washington, Okrug Vashington, Quan Washington, Quận Washington, Uoshingtun, Vashington, Vasington srjan, Washington, Washington Comitatus, Washington Kun, Washington Kūn, Washington konderria, Washington megye, Washingtoni maakond, hua sheng dun xian, mqatʿt washntn, raasintana ka'unti, shhrstan washyngtn awrgn, washinton jun, Вашингтон, Округ Вашингтон, Уошингтън, Վաշինգտոն շրջան, شهرستان واشینگتن، اورگن, مقاطعة واشنطن, واشنگٹن کاؤنٹی، اوریگون, ৱাশিংটন কাউন্টি, ワシントン郡, 華盛頓縣

People born in Washington County (3)

People born in Washington County, including politician William N. Barrett, Attorney, politician Jennifer Williamson, Mahlon Blaine, .

List

Other places with the same name (30)

Oregon Other Counties (more counties)

County Name Population Title
Multnomah County 815,637 County in Oregon, United States
Portland 656,751 The twenty-sixth most populous city in the United States and the center of the Portland metropolitan area.
Clackamas County 421,596 County in Oregon, United States
Lane County 382,986 County in Oregon, United States
Marion County 349,204 County in Oregon, United States
Jackson County 221,844 County in Oregon, United States
Deschutes County 201,769 County in Oregon, United States
Salem 175,891 The capital of Oregon.
Eugene 173,236 The second most populous city in Oregon.
Linn County 131,054 County in Oregon, United States
Terrebonne 117,664 Census-designated place in Deschutes County, Oregon
Douglas County 111,364 County in Oregon, United States
Hillsboro 110,985 The most populous city in Washington County, Oregon.
Gresham 110,031 The second most populous city in Multnomah County, Oregon.
Yamhill County 107,664 County in Oregon, United States
Bend 101,886 The most populous city in Deschutes County, Oregon.