The Pontotoc County Courthouse is a historic courthouse in Ada, Oklahoma. The building has been listed on the National Register of Historic Places since 1984. The county built the structure in 1926. In 2011, the courthouse underwent extensive remodeling. References Courthouses on the National Register of Historic Places in Oklahoma Government buildings completed in 1926 Ada, Oklahoma Buildings and structures in Pontotoc County, Oklahoma County courthouses in Oklahoma National Register of Historic Places in Pontotoc County, Oklahoma