The Toltec Mounds Archeological State Park is a state park and historic site in Scott, Arkansas. It is noted for being the home of the tallest surviving prehistoric mounds in all of the state of Arkansas.

Also known as the Knapp Mounds, Toltec Mounds, or the Toltec Mounds Site, the Toltec Mounds Archeological State Park traces the roots of its significance back to the Late Woodland period when it was still used by ancient Native American tribes. It was mistaken for being a site used by the Toltecs of Mexico, but later investigations by archaeologists from the Smithsonian Institutions Bureau of American Ethnology proved otherwise.

Declared as a National Historic Landmark, the Toltec Mounds Archeological State Park is open to the public for tours and other activities.