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–Sunni relations
The present demographic breakdown between the two denominations is difficult to assess and varies by source, but a good approximation is that 85% of the world's Muslims are Sunni and 15% are Shia Muslims and with most Shias belonging to the Twelver tradition and the rest divided between many other groups. Sunnis are a majority in most Muslim communities: in Southeast Asia, China, South Asia, Africa, and a part of the Arab world. Shia make up the majority of the citizen population in Iraq, Bahrain, Lebanon, Iran and Azerbaijan, as well as being a politically significant minority in Pakistan, Syria and Yemen. Azerbaijan is also 95% Shia.
Along with a population in Kuwait, Saudi Arabia.