Foster's Mound (22 AD 503) is a Plaquemine culture archaeological site located in Adams County, Mississippi northeast of Natchez off US 61. It is the type site for the Foster Phase (1350-1500 CE) of the Natchez Bluffs Plaquemine culture chronology. It was added to the NRHP on September 2, 1982 as NRIS number 82003091.