The Winterville Site (22 WS 500) is a major archaeological site in unincorporated Washington County, Mississippi, north of Greenville. 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 (1200 to 1400) 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. In June 2015 the state authorized $300,000 to restore the mounds to their pre-Columbian condition and add walking trails to the park. The site also includes a museum.