Washington County, Oregon

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Washington County is one of 36 counties in the U.S. state of Oregon. As of the 2010 census, the population was 529,710,[1] making it the state's second most populous county.[2] The county seat and largest city is Hillsboro.[2][3]

References[change | change source]

  1. "State & County QuickFacts". United States Census Bureau. Retrieved November 15, 2013.
  2. 2.0 2.1 Proehl, Risa S. (March 2009). "2008 Oregon Population Report" (PDF). Population Research Center. Portland State University. p. 7. Retrieved May 5, 2009.
  3. "Find a County". National Association of Counties. Retrieved June 7, 2011.