The Sioux County Courthouse, located at the northeast corner of Main and 3rd Streets in Harrison, is the center of government of Sioux County, Nebraska. The courthouse was built in 1930 to replace the county's first courthouse, an 1888 building that had fallen into poor condition. Architect E.L. Goldsmith of Scottsbluff designed the courthouse in the County Citadel style, a Classical Revival-influenced design used in six Nebraska courthouses.