Most of the rivers of Turkey flow into the seas surrounding the country. The Firat (Euphrates) and Dicle (Tigris) join together in Iraq and flow into the Persian Gulf. Turkey's longest rivers, the Kizilirmak, Yesilirmak and Sakarya, flow into the Black Sea. The Susurluk, Biga and Gonen pour into the Sea of Marmara, the Gediz, Kucuk Menderes, Buyuk Menderes and Meric into the Aegean, and the Seyhan, Ceyhan and Goksu into the Mediterranean .
Kızılırmak 1,355 km Flow into the Black Sea
Fırat (Euphrates) 971 km Flow into the Persian Gulf
Sakarya 824 km Flow into the Black Sea
Büyük Menderes 584 km Flow into the Aegean Sea
Seyhan 560 km Flow into the Mediterranean Sea
Aras 548 km Flow into the Caspian Sea
Dicle (Tigris) 523 km Flow into the Persian Gulf
Yeşilırmak 519 km Flow into the Black Sea
Ceyhan 509 km Flow into the Mediterranean Sea
Çoruh 442 km Flow into the Black Sea