Abstract: Turkey is a rich country in terms of plant diversity. There are 9000 plant species, 3000of them are endemic. Oaks (Quercus spp.) are common trees of deciduous forests in Turkey.Oaks are one of the most diverse groups of tree species in Turkey. There are 18 different speciesof oaks. The oak trees have a number of pathological problems, especially fungi. The objective ofthis paper is to summarize data on the mycoflora of oak trees. According to the relevantliterature, 63 fungus species belonging to 45 genera are reported in Turkey.