This study was carried out to contribute the oak gallwasp fauna (Hymenoptera: Cynipidae) of Turkey. Oak gallwasp specimens collected in the summer of 2010 from Gümüşhane, Turkey were examined for revealing the gallwasp species diversity. Among the collected species 16 are reported previously however with this study new distribution ranges are provided. Furthermore, Cynips korsakovi is reported for the first time here as new species for the Turkish fauna