Courthouses in Monmouth, Oregon, the US. Courthouses locations in Monmouth, Oregon. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Bank Courthouse Finance Insurance Lawyer Real estate School University All courthouses in Monmouth Monmouth Municipal Court Courthouse +1 503-751-0136 151 Main Street West, Monmouth, Oregon 97361 Write a review Phone Website Directions