Dörtyol is a municipality and district located in the Hatay Province of Turkey. It serves as a port city and an oil terminus situated near the easternmost point of the Mediterranean Sea at the head of the Gulf of İskenderun.
The district covers a total area of 342 km² and had a population of 128,941 as of 2022. It is positioned approximately 26 km north of the city of İskenderun.