This study reports twelve species of cladoniicolous fungi from Turkey. Nine of these taxa, i.e. Abrothallus cladoniae R.Sant. And D.Hawksw., Epicladonia stenospora (Harm.) D.Hawksw., Lichenosticta alcicornaria (Linds.) D.Hawksw., Lichenoconium aeruginosum Diederich, M.Brand, van den Boom and Lawrey, Phoma foliaceiphila Diederich, Kocourk. And Etayo, Scutula cladoniicola Alstrup and D.Hawksw., Sphaerellothecium cladoniicola E.S. Hansen and Alstrup, Syzygospora bachmannii Diederich and M.S.Christ., and Taeniolella beschiana Diederich, are new records for Turkey. A key to these 12 species of lichenicolous fungi on Cladonia species is provided.