Samandağ, formerly known as Süveydiye, is a municipality and district of Hatay Province, Turkey. Its area is 384 km², and its population is 123…Samandağ, formerly known as Süveydiye, is a municipality and district of Hatay Province, Turkey. Its area is 384 km², and its population is 123,447. It lies at the mouth of the Asi River on the Mediterranean coast, near Turkey's border with Syria, 25 km from the city of Antakya. In February 2023, the town was heavily damaged by powerful earthquakes.