Land for sale in Uintah County recently totaled approximately $64 million and almost 100,000 acres. Based on the combined acreage of land and rural property for sale here, Uintah County has the most land for sale of all counties in the Beehive State. Vernal had the most land for sale. Mining and mineral extraction-related services are the main economic drivers in this part of Utah. Uintah County is one of the ten biggest counties in Utah (4,504 square miles). It's located in the East Utah region of the state.