One genus, Ornithoica Rondani, and two species, Ornithoica momiyamai Kishida, and O. unicolor Speiser, are reported for the first time from the Republic of Korea. A total of six species, including two new records, of louse flies were collected from 78 birds belonging to 35 species from Seoul and Incheon Metropolitan Areas and Gyeonggi, Gangwon, Gyeongsangbuk, Jeollabuk, and Jeollanam Provinces, 2005-2010. An updated checklist of Korean hippoboscids consisting of seven genera (Hippobosca L., Icosta Speiser, Lipoptena Nitzsch, Ornithoica Rondani, Ornithoctona Speiser, Ornithomya Lattreille, and Ornithophila Rondani) and 11 species is presented, including hosts, collection records, and repositories.