The Yankeetown Archaeological Site, located along the Ohio River in Warrick County, Indiana, is of paramount significance as the type site for the Yankeetown phase, a distinct prehistoric cultural manifestation dating to the Late Woodland period (approximately A.D. 750 to 1000). First identified and systematically investigated in the mid-20th century, the site defines a regional culture characterized by its highly distinctive ceramic tradition. Yankeetown pottery is renowned for its thin-walled, grog-tempered vessels decorated with intricate incised, bar-stamped, and appliqu motifs. The site's strategic riverine setting provided its prehistoric inhabitants with abundant natural resources and facilitated regional trade networks throughout the lower Ohio River valley.

Listed on the National Register of Historic Places under Criterion D, the Yankeetown Archaeological Site holds immense research potential for understanding the complex social and technological transitions occurring at the end of the Woodland period. The site's well-preserved subsurface features, including middens and hearths, offer invaluable data regarding prehistoric subsistence strategies, settlement patterns, and social organization just prior to the rise of the Mississippian culture. As the namesake for this regional cultural phase, the site remains a vital benchmark for comparative archaeological research across southern Indiana, western Kentucky, and southern Illinois.