ABSTRACT: The genus Gasteruption Latreille, 1796 (Hymenoptera: Evanioidea: Gasteruptiidae: Gasteruptiinae) from North Iran and Turkey is revised, keyed and fully illustrated for the first time. In total 36 species are treated of which 33 are recorded from Turkey and 23 from Iran. Fifteen species are new for science: Gasteruptionaciculatum van Achterberg, sp. n., Gasteruptionagrenum van Achterberg, sp. n., Gasteruptionbrevibasale van Achterberg & Saure, sp. n., Gasteruptioncoriacoxale van Achterberg, sp. n., Gasteruptionflavimarginatum van Achterberg, sp. n., Gasteruptionheminitidum van Achterberg, sp. n., Gasteruptionhenseni van Achterberg, sp. n., Gasteruptionischnolaimum van Achterberg, sp. n., Gasteruptionnigrapiculatum van Achterberg, sp. n., Gasteruptionpaglianoi van Achterberg & Saure, sp. n.,
