The value of all land and rural real estate for sale in Illinois's DeWitt County recently was nearly $5 million, representing a combined 241 acres of land for sale in DeWitt County. DeWitt County ranks 77th out of 102 counties in the Inland Empire for the total acreage of land currently advertised for sale. Of all land and rural real estate for sale in DeWitt County, Farmer City had the most land for sale. DeWitt County is the 73rd biggest county (405 square miles) in Illinois. It's located in the Central Illinois region of the state.