There was a total of nearly $29 million of land and rural real estate for sale in Unicoi County, Tennessee, recently on Land.com. The total size of all Unicoi County farms, rural land, hunting land and other land for sale was almost 1,000 acres. Unicoi County ranks 67th in the Volunteer State for the total acreage of land currently advertised for sale. Erwin featured the most land for sale. Unicoi County is the 91st biggest county (186 square miles) in Tennessee. It's located in the Eastern Tennessee region of Tennessee.