The value of all farms, ranches, and rural real estate for sale in Montana's Richland County recently was around $5 million, representing a combined 441 acres of land for sale in Richland County. Richland County ranks 34th out of 56 counties in the Treasure State for the total acreage of land currently advertised for sale. Of all farms, ranches, hunting land and other land for sale in Richland County, Sidney had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Montana. Richland County is the 32nd biggest county (2,103 square miles) in Montana. It's located in the Missouri River Country Montana region of the state.