Demographics of Iraq
97% of Iraqis follow Islam: 61% Shia and 34% Sunni. 1% of these describe themselves as "Just a Muslim". According to the CIA Factbook, Shias make up 60% of population, while Sunnis 35%. Christianity accounts for 5%, and the rest practice Mandaeism, Yazidism and other religions.
Shia Muslims in the Arab world
Islam is historically divided into two major sects, Sunni and Shia Islam, each with its own sub-sects. Significant minorities of Shia Arab Muslims live in some Arab countries including Lebanon, Iraq and the Gulf states of Saudi Arabia, Kuwait, Oman, the UAE, and Qatar. Shia Muslims are a numerical majority in Iraq. In Bahrain while the Shia currently form a plurality of the country's citizens they are a minority in the total population. Nearly half of the Muslim population in Lebanon and a quarter in Yemen are Shia.