The original section of the courthouse was built in 1805, with additions and / or remodeling in 1835, 1854–55, 1909, and 1963–64. It is a rectangular brick building on a stone foundation, measuring 135 feet long by 60 feet wide.
The building is faced in stucco and has a gable roof topped by a cupola. It features a Greek Revival style entry porch with eight 26 foot high smooth faced columns with Ionic order capitals. The porch was added in 1835.
