The famous person P.J. Kniss is associated with one of more of the Rock County historic places.
Some of the country's most noteable architects helped create the Rock County places including Perley N. Gillham, Hewett Bridge Co., T.D. Allen, W.E.E. Greene, Worthington & Sioux Falls Railroad, Jacob Nuffer, Joseph H. Jones, Hafsaas & Soutar, Chicago & Northwestern Railway Co. and George Soutar. Prominent architectural styles found in Rock Country are Romanesque, Classical Revival and Colonial Revival.