Eleutherodactylus ruthae (common name: Ruth's robber frog) is a species of frog in the Eleutherodactylidae family. It is endemic to Hispaniola and known from scattered locations in both Haiti and the Dominican Republic. It was described by Gladwyn Kingsley Noble, who named it in honour of his wife, Ruth Crosby Noble; she also first discovered the species. It might represent more than one species. Eleutherodactylus aporostegus, Eleutherodactylus bothroboans, Eleutherodactylus tychaethrous were first described as subspecies of Eleutherodactylus ruthae, but have later been elevated to full species status.