Ceyhan is a municipality and district of Adana Province, Turkey. Its area is 1,426 km2, and its population is 158,922 (2022). It is the most populous district of the province, outside the city of Adana. Ceyhan is the transportation hub for Middle Eastern and Central Asian oil and natural gas. The city is situated on the Ceyhan River that flows through Çukurova plain. The Ceyhan River is dammed at Aslantas to provide flood control and irrigation for the lower river basin around Ceyhan.

Adana Province is a province and metropolitan municipality of Turkey located in central Cilicia. The administrative seat of the province is the city of Adana, home to 78.25% of the residents of the province. Its area is 13,844 km2, and its population is 2,274,106 (2022), making it the sixth most populous province in Turkey. It is also closely associated with other Cilician provinces of Mersin, Osmaniye, and (northern) Hatay.