Twenty South Korean tiphiid species are taxonomically reviewed. Among them, Tiphia burrelli is new to Korea. Based on the observation of the holotype, Tiphia seoulensis Tsuneki 1986 is synomymized with T rufomandibulata Smith 1873. Male of T koreana hitherto unknown is newly described. Revised key to species, recognizable characters and digital images are provided. Genital structures of several species hitherto unknown are also given.