There was a combined $10 million of land and rural real estate for sale in Randolph County recently on Land.com. The total of all Randolph County farms, hunting land and other rural land and acreage for sale was nearly 1,000 acres. Randolph County ranks 52nd in the Inland Empire for the total number of acres of land currently advertised for sale. Chester had the most land for sale. Manufacturing and related services are the largest economic sectors in Randolph County. Randolph County is Illinois's 38th largest county (596 square miles). It's located in the Southwest Illinois region of the state.