[in Belarussian with English abstract: ] As a result of the research conducted in 2016–2018, the authors compiled a list of lichens, closely related fungi and myxomycetes of oak forests of the National Park «Belovezhskaya Pushcha». The annotated list contains 188 taxa: 130 species of lichens, 51 species of myxomycetes, 3 saprotrophic non-lichenized and 4 lichenicolous fungi. For the first time, 6 species of lichens Lecanora expallens, Micarea byssacea, M. microareolata, M. soralifera, Parmelia ernstiae, Usnea intermedia and 51 species of myxomycetes are listed for the territory of the Belovezhskaya Pushcha. Lichen species included in the Red Data Book of Belarus are noted in the oak forests: Calicium adspersum, Cetrelia cetrarioides, Chaeno-theca chlorella, C. gracilenta, Lobaria pulmonaria, Menegazzia terebrata, Peltigera horizontalis and Usnea ceratina. 37 species belong to the indicator lichens of old-age oak forests. Keywords: biodiversity, lichen biota, myxomycetes, oak forests, specially protected natural areas, Belarus.