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.
Iraq
A report published by the European Parliamentary Research Service suggests that in 2015 there was 24 million Arabs (15 million Shia and 9 million Sunni); 4 million Sunni Kurds (plus 500,000 Shia Faili Kurds and 200,000 Kaka'i); 3 million Iraqi Turkmen/Turkoman; 1 million Black Iraqis; 500,000 Christians (including Assyrians and Armenians); 500,000 Yazidis; 250,000 Shabaks; 50,000 Roma; 3,000 Sabean-Mandaeans; 2,000 Circassians; 1,000 Baha'i; and a few dozen Jews.