Mangum Mound Site (22 CB 584) is an archaeological site of the Plaquemine culture in Claiborne County, Mississippi. It is located at milepost 45.7 on the Natchez Trace Parkway. Two very rare Mississippian culture repoussé copper plates have been discovered during excavations of the site. The site was used as a burial mound during the Foster Phase of the culture (1350 to 1500 CE) and is believed to have been abandoned before the 1540 expedition of Hernando de Soto.