Turkey, officially the Republic of Turkey, is a transcontinental country located mainly in Western Asia, with a smaller portion on the Balkan Peninsula in Southeast Europe. East Thrace, located in Europe, is separated from Anatolia by the Sea of Marmara and the Turkish Straits. Turkey is bordered by Greece and Bulgaria to its northwest; Georgia to its northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. Ankara is the capital of Turkey, while Istanbul is the country's largest city and leading economic, cultural and historic center. Approximately 70 to 80 per cent of the country's citizens identify as Turks. Kurds are the largest minority; the size of the Kurdish population is a subject of dispute with estimates placing the figure at anywhere from 12 to 25 per cent of the population.