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. The mounds are listed on the Mississippi Mound Trail.