Of 44 counties in the Gem State, Custer County ranks third in terms of size (3 million acres). Custer County is in the Central Idaho region. Recent Land Network data records 1,000 acres of residential land and property for sale in Idaho's Custer County, which is valued at a combined $35 million. The average price of residential land for sale in Custer County was $2 million. Browse all residential land and rural property for sale in Idaho 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.