The Boone County Courthouse is a historic courthouse on Courthouse Square in Harrison, Arkansas. It is a two story brick structure, designed by noted Arkansas architect Charles L. Thompson and built in 1907. It is Georgian Revival in style, with a hip roof above a course of dentil molding, and bands of cast stone that mark the floor levels of the building. It has a projecting gabled entry section, three bays wide, with brick pilasters separating the center entrance from the flanking windows. The gable end has a dentillated pediment, and has a bullseye window at the center.The building was listed on the National Register of Historic Places in 1976.
