Keywords: Highland County Courthouse, Hillsboro.jpg 78002087 39 12 9 N 83 36 44 W Front of the w Highland County Courthouse Ohio Highland County Courthouse located on Courthouse Square at the junction of Main U S Route 50 and State Routes Ohio State Route 73 73 / Ohio State Route 124 124 and High U S Route 62 and Ohio State Route 138 State Route 138 in downtown Hillsboro Ohio Hillsboro Ohio United States Built in 1833 it is Ohio's oldest continually operating courthouse; it is listed on the National Register of Historic Places and it is part of a Register-listed historic districts in the United States historic district the Hillsboro Historic Business District own 2012-10-23 User Nyttend Nyttend No<nowiki></nowiki>ne Highland County Courthouse Ohio Building-centered pictures by User Nyttend Taken with Canon PowerShot A540 |