There was a combined nearly $26 million of farms and ranches for sale in Roosevelt County recently on Land.com. The total size of all Roosevelt County farms, ranches, hunting land and other land for sale was around 100,000 acres. Roosevelt County ranks 42nd in the Treasure State for the total acreage of land currently advertised for sale. Of all ranches, farms, hunting land and other rural land and acreage for sale in Roosevelt County, Culbertson featured the most land for sale. Roosevelt County is Montana's 29th biggest county (2,369 square miles). It's located in the Missouri River Country Montana region of Montana.