Facts about Columbia County, Oregon
Columbia County is a county in the U.S. state of Oregon. As of the 2010 census, the population was 49,351. The county seat is St. Helens. It was named for the Columbia River, which forms its eastern and northern borders.
According to the U.S. Census Bureau, the county has an area of 688 square miles (1,780 km²), of which 657 square miles (1,700 km²) is land and 31 square miles (80 km²) (4.5%) is water. It is Oregon's third-smallest county by land area and fourth-smallest by total area.
As of the 2010 United States Census, there were 49,351 people, 19,183 households, and 13,516 families residing in the county. The population density was 75.1 inhabitants per square mile (29.0/km²). There were 20,698 housing units at an average density of 31.5 per square mile (12.2/km²). The racial makeup of the county was 92.5% white, 1.3% American Indian, 0.9% Asian, 0.4% black or African American, 0.2% Pacific islander, 1.2% from other races, and 3.4% from two or more races. Those of Hispanic or Latino origin made up 4.0% of the population. In terms of ancestry, 26.1% were German, 14.5% were English, 14.4% were Irish, 5.9% were Norwegian, and 4.8% were American.
Of the 19,183 households, 32.0% had children under the age of 18 living with them, 55.5% were married couples living together, 9.8% had a female householder with no husband present, 29.5% were non-families, and 23.3% of all households were made up of individuals. The average household size was 2.55 and the average family size was 2.98. The median age was 41.3 years.
Serving Columbia County, Oregon