The overall value of farmsand rural real estate for sale in McLean County, Illinois, recently on Land.com was approximately $23 million. This represents approximately 1,000 acres of farms, rural land, hunting land and other land for sale in McLean County. McLean County ranks 33rd in Illinois for the total acreage of land currently advertised for sale. Of all farms, rural land, hunting land and other land for sale in McLean County, Le Roy featured the most land for sale. McLean County is one of the ten largest counties in Illinois (1,186 square miles). It's located in the Central Illinois region of the state.