Fallon County is in Southeast Montana. Of the 56 counties in the Treasure State, Fallon County ranks 46th in terms of size (1 million acres). There is almost 1,000 acres of residential land and property for sale in Fallon County, Montana, based on recent Land Network data. The combined market value of farms, ranches, hunting land and other land for sale here is almost $3 million. The average price of residential acreage for sale in Fallon County was $447,333. Browse all residential land and rural property for sale in Montana to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.