Learn About
The Commemorative
Quarter for
The Commemorative Quarter for Washington

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

Columbia County was founded in 1875 and was created by taking area from Walla WallaCounty.

From the Census Estimates for 2009, <1> Columbia had a population of 4,040 people. This is a decrease of 0.59% since the last Census (which gave a population of 4,064 people in 2000).

At the time of the 2000 Census, Columbia represented 0.07% of the total population of Washington, making it the state's 37th most populous county (out of 39 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
20104,078+0.34%+0.94% since 2009
20094,040-0.59%+1.76% since 2008
20083,970-2.31%+0.4% since 2007
20004,064The Last Census

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


Websites for Columbia County

Official Website:   www.columbiaco.com/

If you know of a history or genealogy society whose interest includes Columbia 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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