Of 83 counties in the state, Ontonagon County ranks third in terms of size (3,740 square miles). Ontonagon County is in the Upper Peninsula Michigan region. Michigan's Ontonagon County has about 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, rural land, hunting land and other land for sale here was nearly $800,000. The average price of farms for sale in Ontonagon County was $362,500. Browse all Michigan 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 commercial or individual needs.