Custer County is in Southeast Montana. Of the 56 counties in Big Sky Country, Custer County is 11th in terms of its size (2 million acres). There is 7,000 acres of residential land and property for sale in Montana's Custer County based on recent Land Network data. The combined market value of land and rural real estate for sale here is nearly $17 million. The average price of residential acreage for sale in Custer County was $1 million. 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.