The value of all farms and rural land for sale in Roane County, Tennessee, recently was almost $174 million, representing a total of 3,968 acres of land for sale in Roane County. Roane County ranks 12th out of 95 counties in the Volunteer State for the total acreage of land currently advertised for sale. Of all farms and rural land for sale in Roane County, Rockwood had the most land for sale. Roane County is the 60th largest county (394 square miles) in Tennessee. It's located in the Eastern Tennessee region of the state.