Data on about 27 new for South Korea species of lichen-forming and lichenicolous fungi, including one new for science genus Verseghya and 11 new for science species, i.e.: Agominia loekoesii, Lecanora pseudosambuci, Nectriopsis verseghyklarae, Polysporina golubkovae, Protopar- meliopsis zerovii, Psoroglaena chirisanensis, Pyrenopsis chejudoensis, Ropalospora chirisanensis, Thelopsis chirisanensis, Trapelia coreana, and Verseghya klarae, as well as 27 taxa newly record- ed for the country (Biatora aff. subduplex, Buellia cf. uberior, Caloplaca kedrovopadensis, Catil- laria chalybaea, Coenogonium isidiatum, Dibaeis yurii, Halecania australis, H. lobulata, Intrali- chen christiansenii, Ivanpisutia oxneri, Lecania cf. olivacella, Lecanora lojkahugoi, L. sulphurea, Lecidella mandshurica, Lichenoconium erodens, Micarea lithinella, M. aff. stipitata, Muellerella pygmaea var. pygmaea, Oxneria alfredii, Pertusaria aff. flavocorallina, Phaeosporobolus alpinum, Polycoccum innatum, Porina fluminea, Rinodina xanthophaea, Ropalospora chloantha, Stigmidium cladoniicola, and S. epiramalina) are provided. Additional localities for the recently reported or described 39 species from South Korea, and for 1 species (Oxnerella safavidiorum) from Iran and China (for the first time for China) are provided. The following taxa newly recorded for South Korea, i.e. Ivanpisutia oxneri, Lecanora lojkahugoi, Lecidella mandshurica, Rinodina xanthophaea, Ropalospora chloantha, as well as the newly described Buellia chujadoensis and Verseghya klarae found to be rather common in this country. Key words: Agominia, Ivanpisutia, Korea, Lecanora, Nectriopsis, new for science, Polysporina, Protoparmeliopsis, Psoroglaena, Pyrenopsis, rare, Ropalospora, Thelopsis, Trapelia, Verseghya.