Azerbaijan or Azarbaijan ( Āzarbāijān; Azərbaycan), also Iranian Azerbaijan, is a region in northwestern Iran that borders Iraq, Turkey, the Nakhchivan Autonomous Republic, Armenia, and the Republic of Azerbaijan. Iranian Azerbaijan is administratively divided into West Azerbaijan Province, East Azerbaijan Province, Ardabil Province, and Zanjan Province. The region is mostly populated by Azerbaijanis, with minority populations of Kurds, Armenians, Persians, Talysh, and Assyrians.