Columbia County, Washington Basics:
Columbia County Washington - Government Site
Population: 3,998
Area: 869 square miles
County seat: Dayton
Area code(s) in use: 509
Time zone: PST
High school graduate or higher: 87.7%
Bachelor's degree or higher: 18.7%
Median household income: $45,417
Persons in poverty: 13.2%
Home ownership rate: 76.1%
Mean travel time to work: 17.1 minutes
Adjacent counties:
Franklin Garfield Umatilla (OR) Walla Walla Wallowa (OR) Whitman