[in Russian with English abstract: ] I investigated diversity of three islands on Angara River in the flooding area of the Boguchanskaya hydroelectric power station. 136 species of epiphytic lichens from 62 genera have been revealed. Such species as Leptogium asiaticum, Menegazzia terebrata, Platismatia glauca, Sticta wrightii, Usnocetraria oakesiana are endangered and threatened in the region. Key words: Epiphitic lichens, Angara river, islands, Boguchanskaya hydroelectric power station.