Shiites.
refer to the related question listed below for more infomation.
shia
Most Iranians are Muslims; 92% belong to the Shi'a branch of Islam, the official state religion, and about 8% belong to the Sunni branch of Islam. The remaining 2% are non-Muslim religious minorities, including Bahá'ís, Mandeans, Yarsanis, Zoroastrians, Jews, and Christians.
Shi'aa.The majority or 90% of all Muslims in Iran are Shiites. Shi'a Islam is the official state religion of Iran. Sunni and Sufi only represent 9%of the Muslims there.
Most Iranians are Muslims. Around 90%[1] belong to Shi'a branch of Islam, the official state religion, and about 9% belong to the Sunni branch of Islam. The remaining 0.4% are non-Muslim religious minorities, including Bahá'ís, Mandeans, Hindus, Yarsanis, Zoroastrians, Jews, and Christians
shia which is the sect of the majority in Iran
iran,iraq mainly..
Most Iranians are Muslims; 92% belong to the Shi'a branch of Islam, the official state religion, and about 8% belong to the Sunni branch of Islam. The remaining 2% are non-Muslim religious minorities, including Bahá'ís, Mandeans, Yarsanis, Zoroastrians, Jews, and Christians.
The language of Iran is called Farsi and most Iranians are Shiite Muslims, although this is not an exclusively Iranian version of Islam as it is also practiced in Bahrain, Syria, Azerbaijan, and several other countries.
About 98% of Iran's population of 77,176,930 are Muslims: about 7,560,000. Please see the link.
The predominant branch of Muslims living in Iran is Twelver Shia Islam, which is the official state religion. This sect believes in a line of twelve Imams, starting with Ali ibn Abi Talib, who are considered the rightful successors to the Prophet Muhammad. Shia Islam in Iran is characterized by its unique religious practices, theological beliefs, and cultural traditions, distinguishing it from Sunni Islam, which is more prevalent in other parts of the Muslim world.
No, Islam began in Mecca city in current Saudi Arabia country. but later Iran absorbed Islam and highly supported and developed it. Islam is Iran is Shia Islam and in Saudi Arabia is mostly Sunni Islam.
by Shah you probably mean the King of Iran before Islam revolution in Iran. people considered him as a dictator and made an revolution based on Islam and made Islamic republic of Iran and Shah escaped from Iran and said I am sick and I go for a medicine trip. but never backed to Iran.