Columbia County, Washington
County in Washington, United States / From Wikipedia, the free encyclopedia
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This article is about the county in the U.S. state of Washington. For Washington D.C.'s county, see Washington County, DC and District of Columbia County, DC.
Columbia County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 3,952,[1] making it the second-least populous county in Washington. The county seat and largest city is Dayton. The county was created out of Walla Walla County on November 11, 1875,[2] and is named after the Columbia River (which does not flow through the county). Columbia County is included in the Walla Walla, WA Metropolitan Statistical Area.
Quick Facts Country, State ...
Columbia County | |
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Coordinates: 46°18′N 117°55′W | |
Country | United States |
State | Washington |
Founded | November 11, 1875 |
Named for | Columbia River |
Seat | Dayton |
Largest city | Dayton |
Area | |
• Total | 873 sq mi (2,260 km2) |
• Land | 869 sq mi (2,250 km2) |
• Water | 4.9 sq mi (13 km2) 0.6% |
Population (2020) | |
• Total | 3,952 |
• Estimate (2022) | 4,026 |
• Density | 4.6/sq mi (1.8/km2) |
Time zone | UTC−8 (Pacific) |
• Summer (DST) | UTC−7 (PDT) |
Congressional district | 5th |
Website | www |
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