Columbia County, Washington

Columbia County is a county in the U.S. state of Washington. The county seat is Dayton. 4,078 people lived there at the 2010 census[1] which makes it the third-smallest 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.

Columbia County
Columbia County Courthouse in Dayton
Columbia County Courthouse in Dayton
Map of Washington highlighting Columbia County
Location within the U.S. state of Washington
Map of the United States highlighting Washington
Washington's location within the U.S.
Coordinates: 46°18′N 117°55′W
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
 (2010)
  Total4,078
  Estimate 
(2019)
3,985
  Density4.6/sq mi (1.8/km2)
Time zoneUTC−8 (Pacific)
  Summer (DST)UTC−7 (PDT)
Congressional district5th
Websitewww.columbiaco.com

References

  1. "State & County QuickFacts". United States Census Bureau. Archived from the original on September 5, 2015. Retrieved January 7, 2014.
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