There was a combined $95 million of farmsand rural real estate for sale in Rock County, Wisconsin, recently on Land.com. The total acreage of all Rock County farms and rural real estate for sale was almost 1,000 acres. Rock County ranks 19th out of 72 counties in the state for the combined amount of land currently advertised for sale. Of all locations in Rock County with land and rural real estate for sale, Beloit featured the most land for sale. Rock County is Wisconsin's 49th biggest county (726 square miles). It's located in the Southwest Wisconsin region of Wisconsin.