Displayed on the third floor are eleven portraits, three paintings, five judicial prints and eight restored antique photos, as well as the first telephone booth which located in the City of Mason. The telephone booth is made out of oak, when the oak doors are closed the inside of the booth lights up.

 The Board of Commissioners' Meeting Room is in the northeast corner of the third floor. Originally called the Board of Supervisors, the name changed in 1969 when their positions went from appointed to elected. At the front of the room is a portrait of Samuel D. Ingham. In the past,  Board meetings would last for days or until all business proceedings were completed. The meetings now are very well organized and most of the work is done at liaison committee meetings.

CIRCUIT COURT OFFICE: The Thirtieth Judicial Circuit Court has original jurisdiction over all criminal cases and civil cases involving $10,000 or more, as well as superintending control over all inferior courts. The Circuit Court judges hear appeals of decisions of the District Court and keep records of bond monies and garnishments.

In addition the Courtroom and Board of Commissioner's meeting room, this floor also consists of a separate prisoner holding area, a jury deliberation room, the Judge's Chambers, court reporter's office and a court clerk's office. office.