"Geographical Regions of Turkey
Turkey is generally divided into seven regions: the Black Sea region, the Marmara region, the Aegean, the Mediterranean, Central Anatolia, the East and Southeast Anatolia regions. The uneven north Anatolian terrain running along the Black Sea resembles a narrow but long belt. The land of this region is approximately 1/6 of Turkey's total land area."
More:Geographical Regions of Turkey