Pinckneyville, Archaeological settlement in Union County, South Carolina.

Pinckneyville is an archaeological site spanning roughly 1.8 acres in Union County, South Carolina, containing remains of two brick structures. The location includes a former store building with original interior elements and architectural features from its founding period.

The site was founded in 1791 through an act of the South Carolina General Assembly and served as a judicial center for expanding backcountry settlements. Its establishment reflected the need to extend legal administration into the interior regions.

Pinckneyville was named for Charles Cotesworth Pinckney, and its site was chosen for being central to Union County, though Union held the seat of power. The General Assembly's 1799 restructuring of the court system gave surrounding areas their own courts, drawing legal business away from the town.

The site lies near Union, South Carolina, off the road toward the old stagecoach route that once ran from Charleston to Philadelphia. The two brick ruins stand on the original settlement tract; the surrounding land is privately held, so ask locally before walking the grounds. The site was listed on the National Register in 1969.

The old store building preserves original features such as wainscoting, fireplace, mantel, and decorative molding, suggesting it may have served government purposes. These details hint that the structure functioned as more than a simple commercial space.