Boone County is in Northern Illinois. Of the 102 counties in the state, Boone County ranks 94th in terms of size (282 square miles). Illinois's Boone County includes roughly 1,000 acres of farms for sale based on recent Land Network data. The combined market value of land for sale here was almost $9 million. The average price of farmland for sale in Boone County was $1 million. Farms for sale in Boone County feature livestock including cattle, horses, 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.