The aim of this paper is to increase the knowledge on the diversity of digenean parasites in ophidians and anurans from northeastern Argentina. Specimens of the snakes Eunectes notaeus, Hydrodynastes gigas, Micrurus corallinus, Philodryas sp. and Sibynomorphus sp., and the anurans Rhinella schneideri, Phyllomedusa azurea and Leptodactylus latrans were examined. Twelve digenean species were identified: Catadiscus corderoi Mañé-Garzón, 1958, Catadiscus dolichocotyle (Cohn, 1903), Catadiscus uruguayensis Freitas & Lent, 1939, Choledocystus elegans (Travassos, 1926), Gorgoderina parvicava Travassos, 1922, Haplometroides buccicola Odhner, 1911, Heterodiplostomum lanceolatum Dubois, 1936, Infidum similis Travassos, 1916, Mesocoelium monas (Rudolphi, 1819), Plagiorchis luehei (Travassos, 1927), Telorchis clava (Diesing, 1850) and Travtrema stenocotyle (Cohn, 1902). New host species and/or new locality records from Argentina are presented.