Columbia County, Washington

Columbia County
Columbia County Courthouse in Dayton
Location within the U.S. state of Washington
Washington's location within the U.S.
Coordinates: 46°18′N 117°55′W / 46.3°N 117.92°W / 46.3; -117.92
Country United States
State Washington
FoundedNovember 11, 1875
Named forColumbia River
SeatDayton
Largest cityDayton
Area
 • Total873 sq mi (2,260 km2)
 • Land869 sq mi (2,250 km2)
 • Water4.9 sq mi (13 km2)  0.6%
Population
 (2020)
 • Total3,952
 • Density4.6/sq mi (1.8/km2)
Time zoneUTC−8 (Pacific)
 • Summer (DST)UTC−7 (PDT)
Congressional district5th
Websitewww.columbiaco.com

Columbia County is a county in the U.S. state of Washington. The county seat is Dayton. 3,952 people lived there at the 2020 census[1] which makes it the third-least populous county in Washington. The county was created out of Walla Walla County on November 11, 1875[2] and is named after the Columbia River.

References

  1. "QuickFacts: Columbia County, Washington". United States Census Bureau. Retrieved January 20, 2024.