Macon County is a county in Illinois. It covers 585 square miles (374,656 acres), which represents less than one percent of the state total. Of Illinois's 102 counties, Macon County ranks 19th in terms of the size of its population (107,303, according to 2015 Census estimates). Manufacturing and related services provide the main economic inputs to Macon County. Recent Lands of America data places the average value of land for sale in Macon County at $20,000 per acre. The average listing price was $1,150,000 and the median size of land and real estate for sale in Macon County was 58 acres. Land for sale in Macon County totaled 58 acres and $1.2 million in overall land value. Farmland was the most common type of land for sale in Macon County.