Abstract: The present study is a research on calcareous nannoplankton from the Upper Eocene -Lower Oligocene sediments of the Korkuteli Region which are represented by alternating marl, limestone and sandstone. Fourty-eight nannoplankton species have been defined in this sequence and thetollowing six nannoplankton zones have been distinguished :Upper Eocene: Sphenolithus pseudoradians zone, Isthmolithus recurvus zone Chiasmolithus oamaruensis zone, Discoaster saipanensis zone, Lower Oligocene : Helicopontosphaera reticulata zone, Ericsonia subdisticha zone.The Eocene/Oligoccne boundry can be defined by the last occurrence of Discoaster barbadiensisand Discoaster saipanensis. Also, results were correlated with the other studies for the same stratigraphic level of the world. The study showed that nannoplankton association belongs to the temperate rather than tropic region.Globigerinatheka somiinvoluta zone, Globorotalia cerroazulensis cerroazulensis zone in the UpperEocene and Cassigerella chipolensis/Pseudohastigeri na micra zone in the Lower Oligocene sedimentswere determined. These planktonic foraminifera zones were also correlated with the nannoplanktonzones.