The Potomac Mills was a mill complex located along the Potomac River roughly .5 miles (0.80 km) downriver of Shepherdstown.

In 1829, the mill began producing cement for the Chesapeake and Ohio Canal's construction.

[2] The remaining buildings from the mill occupy an 18-acre (7.3 ha) site and are mostly in ruins.

The stone foundation of the mill's dam, which extends across the river into Washington County, Maryland, is also still part of the site.

[2] The mill site was added to the National Register of Historic Places on February 5, 2014.