There was a total of almost $15 million of land and rural real estate for sale in Montana's Powder River County recently on Land.com. The total acreage of all Powder River County farms, ranches, and rural real estate for sale was approximately 100,000 acres. Powder River County ranks 50th in the Treasure State for the total acreage of land currently advertised for sale. Broadus had the most land for sale. Based on its natural assets, Powder River County's economy is dependent on tourism and recreation. Powder River County is Montana's 16th largest county (3,298 square miles). It's located in the Southeast Montana region of the state.