The Kastamonu region, NW Turkey, is known for its rich foraminiferal marine biota and variety of deposits from Paleocene to Eocene times. The focus of this study is on the foraminiferal assemblages and microfacies analysis of the sediments. Usually Paleocene shallow water limestones overlie Maastrichtian rocks conformably. They are characterized by benthic foraminifera such as Laffitteina mengaudi (Astre) Anomalina sp., Eponides sp., Rotalia sp., Mississippina sp., Haurenidae in the lower strata and numerous rotaliid such as Pseudocuvillierina sireli Inan, Rotalia perovalis Terquem, R. trochidiformis (Lamarck), Kathina selveri Smout, Kathina major Smout, Smoutina? subspherica (Sire1), Miscellanea primitiva Rahaghi in the upper strata. The Eocene clayey limestones, limestones and marls, which generally conformably overlie the Paleocene, are commonly characterized by benthic foraminifera of Orbitolites complanatus Lamarck, Asterigerina rotula (Kaufmann), Gyroidinella magna (Le Calvez), Fabiania cassis (Oppenheim), Nummulites minervensis Schaub, Nummulites burdigalensis de la Harpe, Nummulites millecaput Boubee, Assilina placentula (Deshayes), Assilina exponens (Sowerby).