A total of around 1,000 acres were listed for sale in Union County, Indiana, recently; the value of all Union County farms, hunting land and other rural land and acreage for sale was approximately $4 million. Union County ranks 91st out of 92 counties in the Hoosier?State for the total number of acres of land currently advertised for sale. Of all locations in Union County with farms, hunting land and other rural land and acreage for sale, Liberty had the most land for sale. Union County is Indiana's 90th biggest county (165 square miles). It's located in the East Indiana region of Indiana.