The Hughes Mound Site, also known by the Smithsonian trinomial 3SA11, is an archeological site in Saline County, Arkansas near Benton. The 4.5-acre (1.8 ha) is an important Caddoan village center, at the northeastern frontier of that civilization. It is the only known pyramidal mound site south of Benton on the Saline River. The site has not been dated, but artifacts found there are consistent with the Caddoan period; no contact-period artifacts have been found. The site was listed on the National Register of Historic Places in 1985 for its potential to yield information in the future.