Courthouses in DeKalb, Illinois, the US. Courthouses locations in DeKalb, Illinois. 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 DeKalb US Geological Water Resources Courthouse +1 815-756-9207 650 North Peace Road Suite G, DeKalb, Illinois 60115 Write a review Phone Website Directions