There was a total of approximately $6 million of farms, hunting land and other rural land and acreage for sale in Illinois's DeWitt County recently on Land.com. The total of all DeWitt County land for sale was 1,000 acres. DeWitt County ranks 73rd in the Land of Lincoln for the total number of acres of land currently advertised for sale. Clinton had the most land for sale. DeWitt County is the 73rd largest county (405 square miles) in Illinois. It's located in the Central Illinois region of the state.