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

The community of Kelso is the Seat for Cowlitz County.

Cowlitz County is one of the original counties of Washington and was founded in 1854.

From the Census Estimates for 2009, <1> Cowlitz had a population of 101,966 people. This is an increase of 9.7% since the last Census (which gave a population of 92,948 people in 2000).

At the time of the 2000 Census, Cowlitz represented 1.58% of the total population of Washington, making it the state's 12th 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.

YearPopulationChange
Since 2000
Year-to-Year Change
2010102,410+10.18%+0.44% since 2009
2009101,966+9.7%+0.42% since 2008
2008101,537+9.24%+0.97% since 2007
2007100,557+8.19% 
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200092,948The Last Census

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

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

Community 2009
Population
2000
Population
Change
(2009vs. 2000)
Longview   36,48334,6605.26% increase  
Kelso   12,15011,8952.14% increase  
Woodland   5,3323,78041.06% increase  
Kalama   2,2561,78326.53% increase  
Castle Rock   2,1212,1300.42% decrease  

Websites for Cowlitz County

Official Website:   www.co.cowlitz.wa.us/

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