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.
Iraqi Kurdistan
Iraqi Kurdistan has a religiously diverse population. The dominant religion is Islam, which is professed by the majority of Iraqi Kurdistan's inhabitants. These include Kurds, Iraqi Turkmen, and Arabs, belonging mostly to the Shafi'i school of Sunni Islam. There is also a small number of Shia Feyli Kurds, as well as adherents of Sufi Islam.