Of 46 counties in the Palmetto State, Union County ranks 32nd in terms of size (516 square miles). Union County is in Upstate South Carolina. South Carolina's Union County includes 1,000 acres of lakefront land and property for sale based on recent Land Network data. The combined market value of farms, rural land, hunting land and other land for sale here was nearly $600,000. Browse all waterfront property for sale in Union County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Union County is residential property.