Union County is in Upstate South Carolina. Of the 46 counties in the state, 330,256-acre Union County ranks 32nd by size. Recent listings of residential land and property for sale in South Carolina's Union County totals approximately 2,000 acres and a combined market value of $25 million. The most common type of land for sale by combined acreage in Union County is residential property. The average price of residential land for sale in Union County was $338,591. Browse all residential land and rural property for sale in South Carolina 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.