Ada County is in Southwestern Idaho. Of the 44 counties in the Gem State, Ada County is 31st in terms of its size (678,764 acres). There is approximately 1,000 acres of residential land and property for sale in Idaho's Ada County based on recent Land Network data, making it the most common type of land for sale in Ada County. The combined market value of land for sale here is roughly $543 million. The average price of residential acreage for sale in Ada 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.