The value of ranches, farms, hunting land and other rural land and acreage for sale in Montana's Richland County recently on Land.com was almost $6 million. This represents almost 1,000 acres of land and rural real estate for sale in Richland County. Richland County ranks 35th out of 56 counties in the Treasure State for the total number of acres of land currently advertised for sale. Sidney featured the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Montana. Richland County is Montana's 32nd largest county (2,103 square miles). It's located in the Missouri River Country Montana region of the state.