There was a total of almost $7 million of farms, ranches, and rural real estate for sale in Richland County recently on Land.com. The total acreage of all Richland County land and rural real estate for sale was nearly 1,000 acres. Richland County ranks 35th in the Treasure State for the total acreage of land currently advertised for sale. Of all land and rural real estate 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 Montana's 32nd largest county (2,103 square miles). It's located in the Missouri River Country Montana region of Montana.