In May 1792, American merchant sea captain Robert Gray sailed into the Columbia River, becoming the first recorded American to navigate into it. The voyage, conducted on the privately owned Columbia R
Columbia County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 52,589. The county seat is St. Helens.
Columbia County Courthouse in St. Helens
Columbia County Sheriff's Office
The CC Rider transit service links the county to Portland and points in Washington County, including connecting with TriMet buses and the MAX light rail system in eastern Hillsboro.