The combined value of farms and rural land for sale in Illinois's Champaign County recently on Land.com was almost $93 million. This represents nearly 100,000 acres of land and rural real estate for sale in Champaign County. Based on the combined acreage of land and rural property for sale here, Champaign County has the most land for sale of the 102 counties in the Prairie State. Among cities in Champaign County with land and rural real estate for sale, Urbana had the most land for sale. Government and state-level services are the main economic drivers in Champaign County. Champaign County is one of the ten largest counties in Illinois (998 square miles). It's located in the Central Illinois region of Illinois.