Boone County is in Northern Illinois. Of the 102 counties in the state, 282-square-mile Boone County ranks 94th by size. Illinois's Boone County includes 1,000 acres of farms for sale based on recent Land Network data. The combined market value of land for sale here was almost $8 million. The average price of farms for sale in Boone County was $1 million. Farms for sale in Boone County sustain livestock including horses, cattle, goats, sheep and pig. Browse all Illinois farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future business or lifestyle needs.