Courthouses in Yankton, South Dakota, the US. Courthouses locations in Yankton, South Dakota. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Bank Courthouse Finance Funeral home Insurance Lawyer Real estate School Travel University All courthouses in Yankton Circuit Court Courthouse +1 605-668-3095 410 Walnut Street # 201, Yankton, South Dakota 57078 Write a review Phone Website Directions