The State Line Archeological District (also known as the State Line Site) is a complex of archaeological sites and national historic district located west of Elizabethtown, Ohio, United States. Located on both sides of the Indiana/Ohio border,[2] the historic district is composed of five contributing properties spread out across 8 acres (3.2 ha) of land.[1] It is believed to have been the site of a village of the Fort Ancient culture of prehistoric Native Americans.