Dörtyol, historically Chok Merzimen, is a municipality and district of Hatay Province, Turkey. Its area is 342 km², and its population is 128,941. I…Dörtyol, historically Chok Merzimen, is a municipality and district of Hatay Province, Turkey. Its area is 342 km², and its population is 128,941. It is a port city and oil terminus located 26 km north of the city of İskenderun, near the easternmost point of the Mediterranean at the head of the Gulf of İskenderun.