Astragalus silifkeense Dinc, Aytac & Dogu sp. nov. (Fabaceae, sect. Astragalus Bunge) is described as a new species from Silifke (Mersin Province), in southern Anatolia, Turkey. The new species is closely related to A. columnaris Boiss., endemic to Denizli in western Anatolia, and A. gilvus Boiss. in Ankara Province, Turkey. Taxonomic descriptions, as well as pollen and seed characters of the new species, are presented. The new species grows in an open Abies cilicica (Antoine & Kotschy) Carriere forest. The geographical distribution of the new species, along with that of A. columnaris and A. gilvus, is shown. The new species is compared with is relatives A. columnaris and A. gilvus.