Washington County

Washington County

  • Photos
  • Area
    1880
  • Population
    588,957 (2017)
  • County seat
    Hillsboro
  • Did you know
    Washington is the second-highest-income Oregon location by per capita income ($30,522).
Washington County Profiles
  • About

    Washington County is one of 36 counties in the U. S. state of Oregon. As of the 2010 census, the population was 529,710, making it the state's second most populous county. The county seat and largest city is Hillsboro. Washington County is part of the Portland-Vancouver-Hillsboro, OR-WA Metropolitan Statistical Area.

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