Courthouses in Warrenton, Oregon, the US. Courthouses locations in Warrenton, Oregon. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Courthouse Finance Insurance Lawyer Real estate School Travel All courthouses in Warrenton Warrenton Court Clerk Courthouse +1 503-861-0792 225 South Main Avenue, Warrenton, Oregon 97146 Write a review Phone Website Directions