Summary: From the province of Upper Austria 31 new, overlooked or rare lichens, parasitic lichens and lichenicolous fungi are recorded. 18 species are new for Upper Austria: Abrothallus bertianus, Arthopyrenia punctifornis, Caloplaca boulyi, Catillaria lenticularis. Lichenodiplis lecanorae, Micarea hedlundii, Muellerella lichenicola, H. pygmaea, Opegrapha dolomitica, 0. pulvinata, Phaeosporobolus usneae, Placynthium subradiatum, Scoliciosporum umbrinum, Sphinctrina anglica, Strigula glabra, Vouauxiella lichenicola, V. verrucosa und Vouauxiomyces santessonii. Pachyphiale ophiospora and Rinodina efflorescens are new for the Austrian flora.