The value of all land for sale in Idaho's Custer County recently was nearly $88 million, representing a total of 2,546 acres of land for sale in Custer County. Custer County ranks 32nd out of 44 counties in the state for the combined amount of land currently advertised for sale. Among cities in Custer County with land and rural real estate for sale, Challis featured the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Idaho. Custer County is one of the ten biggest counties in Idaho (4,938 square miles). It's located in the Central Idaho region of Idaho.