A combined nearly 1,000 acres were listed for sale in Union County recently; the overall value of all Union County farms, rural land, hunting land and other land for sale was around $3 million. Union County ranks 92nd in the Hospitality State for the total number of acres of land currently advertised for sale. Liberty featured the most land for sale. Union County is the 90th biggest county (165 square miles) in Indiana. It's located in the East Indiana region of Indiana.