Rivers of Turkey can be divided into several groups depending on where they flow.
Flow into the Black Sea : Europe ; Mutludere (also known as Rezovo) flows from Turkey into Bulgaria. 112 km. - Veleka flows into Bulgaria and then into the Black Sea. 147 km (25 km in Turkey)
Anatolia; Kızılırmak 'Red River' is the longest river in Turkey, also known as the Halys River. 1,350 km, Delice River - Devrez River - Gök River (also known as Gökırmak and in Classical times, Amnias ) - Sakarya River is the third longest river in Turkey, also known as Sangarius. 824 km - Seydisuyu - Porsuk Çayı - Ankara River - Yeşilırmak 'Green River' (Classical Iris). 418 km - Çekerek River (Classical Scylax) - Kelkit River (Classical Lycus (one of several) - Yağlıdere - Kılıçlar River - Tohumluk River - Üçköprü is not actually a river but the point where the Kılıçlar and Tohumluk meet - Aksu Deresi in Giresun Province : Batlama River in Giresun - Bartın River (Classical Parthenius) - Çoruh River (Classical Acampsis) - Gelevara Deresi - Kara Dere (Classical Hyssus or Hyssos) - Machakhlistskal(i) - Terme River (Classical Thermodon) - Yenice or Filyos River
Flow into the Marmara Sea : Biga Çayı, the classical Granicus - Mustafakemalpaşi Çayı, the classical Ryhndacus - Simav Çayı or Susurluk Çayı, the classical Makestos
Flow into the Aegean Sea Europe : Meriç (Maritsa or Evros) is in the European section of Turkey and has its source in Bulgaria. It is 480 km long. - Tunca is a 350 km tributary in Bulgaria - Ergene is a tributary inside of Turkey. Anatolia : Bakırçay (Classical Caicus or Astraeus) - Büyük Menderes River (Classical Maeander or Meander). 548 km - Lycus (river of Phrygia) - Cadmus (river) - Cayster River or Küçük Menderes. 114 km - Gediz River (Classical Hermus). 401 km- Pactolus (also known as Sart Çayı) - Karamenderes River (Classical Scamander) -
Flow into the Mediterranean Sea : Aksu (Classical Kestros) - Manavgat River - Dim River - Köprüçay River (Classical Eurymedon) - Göksu. 260 km - Limonlu Çayı (also known as Lamos (Cilicia) - Müftü River - Tarsus River (also called Berdan; Classical Cydnus) - Seyhan River (Classical Sarus) - Zamantı River - Ceyhan River (Classical Pyramus or Leucosyrus). 509 km - Payas River - Deli Çay River - Asi River (Classical Orontes) - Afrin River - Karasu - Ermenek River
Flow into the Persian Gulf : Euphrates - Khabur River - Jaghjagh River - Balikh River - Sajur River - Karasu - Murat River - Tigris - Great Zab (in Turkish Büyükzap Suyu) - Khabur (Tigris) - Botan River (Uluçay) - Batman River - Hezir River
Flow into the Caspian Sea: Kura River - Aras River - Arpaçay River (also known as Akhurian) is a tributary of the Aras. It arises in Armenia and forms part of the border between Armenia and Turkey before joining the Aras.