Courthouses in Lyndon, Kansas, the US. Courthouses locations in Lyndon, Kansas. Find the nearest courthouses locations, near you. All types of business services Accounting ATM Courthouse Finance Insurance Lawyer Real estate School All courthouses in Lyndon Osage County Adult & Juvenile Courthouse +1 785-828-4514 717 Topeka Avenue, Lyndon, Kansas 66451 Write a review Phone Directions