A combined almost 1,000 acres were listed for sale in Indiana's Union County recently; the value of all Union County farms, rural land, hunting land and other land for sale was approximately $5 million. Union County ranks 89th out of 92 counties in Indiana for the total number of acres of land currently advertised for sale. Among cities in Union County with land and rural real estate for sale, Liberty had the most land for sale. Union County is Indiana's 90th largest county (165 square miles). It's located in the East Indiana region of Indiana.