You asked:

How many people live in washington county?

Washington County, OR
Washington County, OR

The population of Washington County, OR on April 17th 2014 is approximately 566,621. (Extrapolated from a population of 445,342 on May 24th 2008 and a population of 529,710 on June 18th 2012.)

tk10npubl tk10ncanl

Say hello to Evi

Evi is our best selling mobile app that can answer questions about local knowledge, weather, books, music, films, people and places, recipe ideas, shopping and much more. Over the next few months we will be adding all of Evi's power to this site.

Until then, to experience all of the power of Evi you can download Evi for free on iOS, Android and Kindle Fire.

Other ways this question is asked: