A combined around 2,000 acres were listed for sale in Union County recently; the value of all Union County farms, hunting land and other rural land and acreage for sale was $57 million. Union County ranks 44th out of 95 counties in the state for the total acreage of land currently advertised for sale. Sharps Chapel had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Union County. Union County is the 86th largest county (247 square miles) in Tennessee. It's located in the Eastern Tennessee region of Tennessee.