Land for sale in Camas County, Idaho, recently totaled approximately $5 million and 1,000 acres. Camas County ranks 37th out of 44 counties in the Gem State for the combined amount of land currently advertised for sale. Of all farms and ranches for sale in Camas County, Fairfield had the most land for sale. Camas County is the 29th biggest county (1,078 square miles) in Idaho. It's located in the Central Idaho region of Idaho.