Roosevelt County is in Missouri River Country Montana. Of the 56 counties in the Treasure State, Roosevelt County is 29th in terms of its size (2,369 square miles). There is about 1,000 acres of residential land and property for sale in Roosevelt County, Montana, based on recent Land Network data. The combined market value of land for sale here is nearly $3 million. The average price of residential acreage for sale in Roosevelt County was $366,125. 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.