Land for sale in Idaho's Adams County recently totaled almost $120 million and around 10,000 acres. Adams County ranks 19th in the state for the total number of acres of land currently advertised for sale. Of all locations in Adams County with farms, ranches, and rural real estate for sale, Council featured the most land for sale. Government and state-level services are the main economic drivers in Adams County. Adams County is the 22nd largest county (1,369 square miles) in Idaho. It's located in the Southwestern Idaho region of the state.