Korean species of the dragonfly family Gomphidae are reviewed based on a comprehensive specimen examination. The family can be easily recognized by separated compound eyes, yellowish body color, and similar features of triangle cells on fore- and hindwings. Since a report of 4 Korean species (Seiboldius japonicus, Gomphus melampus, G. postocularis, Gomphus sp.) of the family by Doi (1932), 18 species belonging to 13 genera were recorded by Lee (2006). In this study, we added 5 species and reviewed 23 species of Korean Gomphidae. Identification key and taxonomic remarks were provide: Asiagomphus pryeri is recorded for the first time in South Korea; 3 North Korean species in the genus Davidius are added; Gomphus postocularis is treated as subspecies Shaogomphus postocularis epophthalmus; larval stage of Burmagomphus KUa is identified as Burmagomphus collaris; Ophiogomphus forficula is the synonym of O. obscurus not O. reductus.