The overall value of farmsand rural real estate for sale in McLean County recently on Land.com was approximately $23 million. This represents 1,000 acres of farms and rural land for sale in McLean County. McLean County ranks 32nd in the Inland Empire for the total acreage of land currently advertised for sale. There were two properties listed as sold in McLean County through the Land Network Comparable Sales Program. This represented a total value of $2,677,788. Carlock had the most land for sale. McLean County is one of the ten biggest counties in Illinois (1,186 square miles). It's located in the Central Illinois region of Illinois.