The Atchison County Courthouse, located at 400 South Washington Street in downtown Rock Port, Missouri, was constructed in 1882. The county court, comprised of the presiding judge J. T. Wells, associate judges William Compton and Albert Gerdes, and county clerk M. L. Lee, began its operation in this building in 1883. Edmund J. Eckel and George R. Mann of St. Joseph, Missouri were responsible for the architectural design of this courthouse.