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The Commemorative
Quarter for
The Commemorative Quarter for Oregon

Time Zone: Washington County lies in the Pacific Time Zone (PST/PDT) and observes daylight saving time.

The community of Hillsboro is the Seat for Washington County.

Washington County is one of the original counties of Oregon and was founded in 1843.

From the Census Estimates for 2009, <1> Washington had a population of 537,318 people. This is an increase of 20.65% since the last Census (which gave a population of 445,342 people in 2000).

At the time of the 2000 Census, Washington represented 13.02% of the total population of Oregon, making it the state's 2nd most populous county (out of 36 counties).

The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.

Since 2000
Year-to-Year Change
2010529,710+18.94%-1.42% since 2009
2009537,318+20.65%+1.93% since 2008
2008527,168+18.37%+1.69% since 2007
2000445,342The Last Census

More information can be found on the Washington County Census Page for Washington County.


Below are some of the communities located in Washington County (for more communities, please visit our Nearby Page for Washington County):

Community 2009
(2009vs. 2000)
Hillsboro   95,53870,18636.12% increase  
Beaverton   93,43676,12922.73% increase  
Tigard   49,25441,22319.48% increase  
Forest Grove   21,44817,70821.12% increase  
Sherwood   17,93011,79152.1% increase  

Websites for Washington County

Official Website:   www.co.washington.or.us/

If you know of a history or genealogy society whose interest includes Washington County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.

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Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2000 Census and the next count will be for the 2010 Census.

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<2>All Quarter-dollar coin images from the United States Mint.

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