The Black Sea region is a geographical region of Turkey. The largest city in the region is Samsun. Other big cities are Zonguldak, Trabzon, Ordu, Tokat, Giresun, Rize, Amasya and Sinop. It is bordered by the Marmara Region to the west, the Central Anatolia Region to the south, the Eastern Anatolia Region to the southeast, the Republic of Georgia to the nort…The Black Sea region is a geographical region of Turkey. The largest city in the region is Samsun. Other big cities are Zonguldak, Trabzon, Ordu, Tokat, Giresun, Rize, Amasya and Sinop. It is bordered by the Marmara Region to the west, the Central Anatolia Region to the south, the Eastern Anatolia Region to the southeast, the Republic of Georgia to the northeast, and the Black Sea to the north.