Kozan, formerly Sis, is a municipality and district of Adana Province, Turkey. Its area is 1,903 km², and its population is 132,703. It is 68 kil…Kozan, formerly Sis, is a municipality and district of Adana Province, Turkey. Its area is 1,903 km², and its population is 132,703. It is 68 kilometres northeast of Adana, in the northern section of the Çukurova plain. The Kilgen River, a tributary of the Ceyhan, flows through Kozan and crosses the plain south into the Mediterranean. The Taurus Mountains rise up sharply behind the town.