The Triphoridae (Gastropoda: Caenogastropoda: Triphoroidea) of the islands of Saint Helena and Ascension have not been thoroughly studied since the first records of this family were made by Edgar Albert Smith in 1890. Since then only five species of Triphora have been known from Saint Helena and since 1975 only a single species from Ascension Island. In this paper we identify three new species records for Saint Helena (Metaxia elizabethclinghamae spec. nov., Nanaphora renevanwalleghemi spec. nov. and Inella spec.) and four for Ascension Island (Cosmotriphora arnoldoi (Faber & Moolenbeek, 1991), Inella recta (E.A. Smith, 1890), Triphora albanoi spec. nov. and Triphora s.l. spec.). Three of the newly recorded species are described as new species.