A combined nearly 100,000 acres were listed for sale in Idaho's Adams County recently; the overall value of all Adams County land for sale was nearly $137 million. Adams County ranks 18th in the Gem State based on the total amount of acres of land for sale of the 44 counties in the Gem State. Of all locations in Adams County with land for sale, Council had 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 Idaho.