Columbia County


red barn in Columbia County
A barn on Point Adams Road. (Oregon State Archives Scenic Image 20170522-7086​)
County Seat: Courthouse, 230 Strand St., St. Helens 97051
Phone: 503-397-3796 (General); 503-397-7210 (Court Administrator)
Fax: 503-397-7266


Established: Jan. 16, 1854
Elev. at St Helens: 42'
Area: 687 sq. mi.
Average Temp.: January 39.0° July 68.4°
Assessed Value: $6,043,662,288
Real Market Value: $10,815,585,787
(includes the value of non-taxed properties)
Annual Precipitation: 44.60"
Economy: Agriculture, forest products, manufacturing, surface mining and tourism

Related Resources

Oregon county map with Columbia County shaded
"County QuickFacts" (population and economic data from U.S. Census Bureau)
County Seat Map (from Google maps)
County Map (from ODOT) 

Incorporated Cities

Points of Interest

Lewis and Clark Heritage Canoe Trail, Vernonia–Banks State Trail, Jewell Elk Refuge, Sauvie Island Wildlife Area, Sand Island Park, Jones Beach near Clatskanie, Prescott Beach Park, Dibblee Beach, Camp Wilkerson, CZ Trail, Big Eddy Park, Vernonia Golf Course, Lewis and Clark Bridge at Rainier, Columbia County Fairgrounds

History and General Information 

Chinook and Clatskanie Tribes inhabited this bountiful region centuries before Captain Robert Gray, commanding the Columbia Rediviva, landed on Columbia County’s timbered shoreline in 1792. The Corps of Discovery expedition, led by Lewis and Clark, traveled and camped along the Columbia River shore in the area later known as Columbia County in late 1805 and early 1806.

The county has 62 miles of Columbia riverfront with deep water ports and premium industrial property. The Columbia River is a major route for ocean-going vessels and is a popular playground for fishing, boating, camping and windsurfing. The county has two marine parks, Sand Island and J. J. Collins Memorial Marine Park. Columbia County’s strong economic and cultural heritage is centered on industries such as forest products, shipbuilding, mining and agriculture. Residents enjoy the rural lifestyle and scenic beauty of Columbia County, coupled with its proximity to Portland.

County Officials

Commissioners—Margaret Magruder 2025, Casey Garrett 2025, Kelli Jo Smith 2027; Dist. Atty. Jeffrey D. Auxier 2027; Assess. Andrea Jurkiewicz 2027; Clerk Debbie Klug 2027; Justice of the Peace Diana M. Shera Taylor 2025; Sheriff Brian Pixley 2027; Surv. Nathan Woodward; Treas. Mary Ann Guess 2025​