14. Iran
Years of independence: 511
The total population of Iran, that is up next on our list of oldest countries and nations in the world, is more than 82 million people. The dominant religion is Islam, while the main language is Persian. It has been led by a very conservative elite since the revolution in 1979 until now. The highest power in this country is the Supreme Leader, and today on this position is Ayatollah Ali Khamenei.
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