Columbia County is a county located in the U.S. state of Washington. As of 2000, the population was 4,064. The county seat is at Dayton, which is also the county's largest city. It is named after the Columbia River.
Columbia County was created out of Walla Walla County on November 11, 1875.
According to the U.S. Census Bureau, the county has a total area of 874 square miles (2,262 km²), of which, 869 square miles (2,250 km²) of it is land and 5 s...
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Columbia County is a county located in the U.S. state of Washington. As of 2000, the population was 4,064. The county seat is at Dayton, which is also the county's largest city. It is named after the Columbia River.
Columbia County was created out of Walla Walla County on November 11, 1875.
According to the U.S. Census Bureau, the county has a total area of 874 square miles (2,262 km²), of which, 869 square miles (2,250 km²) of it is land and 5 square miles (12 km²) of it (0.54%) is water. It is part of the Palouse, a wide and rolling prairie-like region of the middle Columbia basin.
As of the census of 2000, there were 4,064 people, 1,687 households, and 1,138 families residing in the county. The population density was 5 people per square mile (2/km²). There were 2,018 housing units at an average density of 2 per square mile (1/km²). The racial makeup of the county was 93.73% White, 0.22% Black or African American, 0.96% Native American, 0.42% Asian, 0.05% Pacific Islander, 2.73%...
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