Union County is in East Indiana. Of the 92 counties in the state, 165-square-mile Union County ranks 90th by size. Recent Land Network data totals 1,000 acres of residential land and property for sale in Indiana's Union County, which is valued at a combined $3 million. The average price of residential acreage for sale in Union County was $341,066. Browse all residential land and rural property for sale in Indiana to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.