Largest cities
Istanbul 15,306,000 pop.
Ankara 5,166,000 pop., 5,359,000 urban aggl.
Bursa 2,051,000 pop., 2,260,000 urban aggl.
Diyarbakir 1,088,000 pop.
Highest mountains
Mount Ararat 5,137 m (16,854 ft)
Longest rivers
Euphrates 2,800 km (1,740 mi) total, 1,263 km (785 mi) in Turkey
Tigris 1,850 km (1,150 mi) total, 523 km (325 mi) in Turkey
Kizilirmak 1,355 km (842 mi)
Aras 1,072 km (666 mi) total, 548 km (341 mi) in Turkey
Largest lakes
Van 3,713 km² (1,434 sq mi)
Tuz Gölü 1,500 km² (579 sq mi)
Beysehir 656 km² (253 sq mi)
Egirdir 468 km² (181 sq mi)
Aksehir 353 km² (136 sq mi)
Largest islands
Gökçeada 287 km² (111 sq mi)
Marmara 126 km² (49 sq mi)