Belen is a municipality and district of Hatay Province, Turkey. Its area is 184 km², and its population is 34,449. When describing his visit to th…Belen is a municipality and district of Hatay Province, Turkey. Its area is 184 km², and its population is 34,449. When describing his visit to the region in the 17th century, Evliya Çelebi mentioned that belen means slope in the Turkmen language.