Boone County is in Northern Illinois. Of the 102 counties in the Prairie State, 180,518-acre Boone County ranks 94th by size. Illinois's Boone County has 1,000 acres of farms for sale based on recent Land Network data. The combined market value of land for sale here was approximately $5 million. The average price of farmland for sale in Boone County was $794,625. Farms for sale in Boone County support 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.