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.
Christianity in Iraq
In Iraq, Christians numbered about 1,500,000 in 2003, representing just over 6% of the population of 26 million (down from 1.4 million or 8.5% of 16.5 million in 1987). Since then, it has been estimated that the number of Christians in Iraq have dropped to as low as 250,000 in 2018. However, due to a lack of an official census, the number is difficult to estimate. The most widely followed denomination among Iraq Christians is the Chaldean Catholic Church. However, the Assyrian Church of the East plays a bold role in the demographics.