Of 44 counties in the state, Twin Falls County ranks 13th by size (1,928 square miles). Twin Falls County is in South Central Idaho. Recent listings of ranches for sale in Idaho's Twin Falls County totals approximately 1,000 acres and a combined market value of about $1 million. The most common type of land for sale by combined acreage in Twin Falls County is house. Browse all Twin Falls County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Twin Falls County is house.