Korean species of Achyrolimonia Alexander, 1965, Discobola Osten Sacken, 1865, Elephantomyia Osten Sacken, 1860, Geranomyia Haliday 1833, Helius Lepeletier and Serville, 1828 (in Latreille et al., 1833), Libnotes Westwood, 1876 and Trentepohlia Bigot, 1854 crane flies (Diptera: Limoniidae) are taxonomically revised. Genera Elephantomyia and Trentepohlia, subgenus Libnotes (Afrolimonia) Alexander, 1965, species Achyrolimonia basispina (Alexander, 1924), Geranomyia multipuncta Alexander, 1922, Helius (Helius) nipponensis (Alexander, 1913), Libnotes (Libnotes) amatrix (Alexander, 1922), L. (L.) longistigma Alexander, 1921, and L. (L.) puella Alexander, 1925 are new records for the Korean peninsula. Genera Discobola Osten Sacken, 1865, Geranomyia Haliday, 1833 and Libnotes Westwood, 1876 are new records for South Korea. Identification keys, redescriptions and illustrations of all species and both sexes, if they were found in Korea, are presented.