Courthouses in Kelso, Washington, the US. Courthouses locations in Kelso, Washington. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Bank Courthouse Finance Funeral home Insurance Lawyer Real estate School University All courthouses in Kelso Kelso Municipal Court Courthouse +1 360-577-3073 312 1st Avenue South #207, Kelso, Washington 98626 Write a review Phone Website Directions