There was a combined around $19 million of farms and rural land for sale in Michigan's Ontonagon County recently on Land.com. The total of all Ontonagon County farms and rural real estate for sale was almost 6,000 acres. Ontonagon County ranks 74th based on the combined acreage of land for sale of all the counties in the Great Lakes State. Among cities in Ontonagon County with farms and rural real estate for sale, Ontonagon had the most land for sale. Based on its natural assets, tourism and recreation contribute significant revenue toward Ontonagon County's overall GDP. Ontonagon County is one of the ten largest counties in Michigan (3,740 square miles). It's located in the Upper Peninsula Michigan region of the state.