Boise County is in Southwestern Idaho. Of the 44 counties in the Gem State, Boise County is 15th in terms of its size (1 million acres). Recent Land Network data records almost 1,000 acres of residential land for sale in Idaho's Boise County, which is valued at a combined $7 million. The average price of residential acreage for sale in Boise County was $638,090. 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.