Abstract: Systematic description of the species of Nummulites have been studied in the marine Oligocène sediments of Kırklareliregion (North of Thrace), in the otherhand the stratigraphy of the region is given shortly.The rock units of Paleozoic and Paleogene ages crop out in the region. Paleozoic (Lower Paleozoic) sequence is composed of metamorphic rocks. The Paleozoic rocks are unconformably overlain by the sandy and algal limestones of theLutetian? age. Algal limestones contain genera of the Foraminifera such as Discocyclina sp., Rotalia sp., Priabonian sequence conformably overlies the algal limestones of Lutetian (?) age, it is composed of sandy limestones and it ischaracterized by the species of Foraminifera such as Nummulites fabianii (Prever), Chapmanina gassinensis (Silvestri), Fa.biania cassis (Oppenheim), Discocyclina sp., Asterocyclina sp. and Queraltina sp., Lower-Middle Oligocène sequence conformably overlies the sandy limestones of Priabonian age. It is composed of clayey limestone. Oligocène sequence containsabundant Nummulites species, such as Nummulites intermedius (d`Archiac), N. fichteli Michelotti, N. vascus Joly andLeymerie in large amount.