The Ceyhan River (historically Pyramos or Pyramus (Greek: Πύραμος), Leucosyrus (Greek: Λευκόσυρος)) is a river in Anatolia in the south of Turkey.
The Ceyhan River has its source (known as Söğütlü Dere) at a location called Pınarbaşı 3 km on the Nurhak Mountains of the Eastern Taurus Mountains range, southeast of the town of Elbistan in the Kahramanmaraş province of Turkey. According to classical references its source is at Cataonia near the town of Arabissus. Its main tributaries are called Harman, Göksun, Mağara Gözü, Fırnız, Tekir, Körsulu, Aksu (which joins Ceyhan at the outskirts of Kahramanmaraş), Çakur, Susas, and Çeperce. Its total length is 509 kilometres.
