The Prairie County Courthouse of Des Arc, Arkansas is one of two county courthouses in Prairie County, Arkansas. Des Arc is one of two county seats, and De Valls Bluff, the other also has a courthouse. The one in Des Arc is located downtown, at Court Square and 2nd Streets. It is a handsome two story brick building with Georgian and Italian Revival features, designed and built in 1913, after the city's second county courthouse was destroyed by fire. It was designed by R.P. Morrison and cost $27,500. The building was listed on the National Register of Historic Places in 1977.