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.
Year | Population | Change Since 2000 | Year-to-Year Change |
2010 | 4,078 | +0.34% | +0.94% since 2009 |
2009 | 4,040 | -0.59% | +1.76% since 2008 |
2008 | 3,970 | -2.31% | +0.4% since 2007 |
2007 | 3,954 | -2.71% | |
--- | | | 2000 | 4,064 | The Last Census |
More information can be found on the Columbia County Census Page for Columbia County. .
Websites for Columbia County
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