Land for sale in Butte County, Idaho, recently totaled approximately $2 million and 1,000 acres. Butte County ranks 43rd out of 44 counties in the Gem State for the combined amount of land currently advertised for sale. Among cities in Butte County with farms, ranches, hunting land and other land for sale, Arco had the most land for sale. Butte County is one of the ten biggest counties in Idaho (2,238 square miles). It's located in the Central Idaho region of the state.