Bakhtyārī, also spelled Bakhtiyārī, one of the nomad peoples of Iran; its chiefs have been among the greatest tribal leaders in Iran and have long been influential in Persian politics. The Bakhtyārī population of approximately 880,000 occupies roughly 25,000 square miles (65,000 square km) of plains and mountains in western Iran. They speak the Lurī dialect of Persian and are Shīʿite Muslims.