There was a total of $36 million of land for sale in Montana's Garfield County recently on Land.com. The total of all Garfield County ranches, farms, hunting land and other rural land and acreage for sale was almost 100,000 acres. Based on the combined acreage of land and rural property for sale here, Garfield County has the most land for sale of all counties in the Treasure State. Of all locations in Garfield County with farms, ranches, and rural real estate for sale, Mosby had the most land for sale. Its economy is defined as agricultural, with 297 farms recorded in the county during the most recent U.S. Census. Farming activities in Garfield County generate annual revenues of $4 million, the majority of which comes from livestock products. Garfield County is one of the ten biggest counties in Montana (4,849 square miles). It's located in the Missouri River Country Montana region of Montana.