The Winterville site is a major archaeological site in unincorporated Washington County, Mississippi, north of Greenville and along the river. It consists of major earthwork monuments, including more than twelve large platform mounds and cleared and filled plazas. It is the type site for the Winterville Phase of the Lower Yazoo Basin region of the Plaquemine Mississippian culture. Protected as a state park, it has been designated as a National Historic Landmark.