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.
Baghdad
As early as 2003, about 20 percent of the population of the city was the result of mixed marriages between Shi'ites and Sunnis: they are often referred to as "Sushis". Following the sectarian violence in Iraq between the Sunni and Shia militia groups during the U.S. occupation of Iraq, the city's population became overwhelmingly Shia. Despite the government's promise to resettle Sunnis displaced by the violence, little has been done to bring this about. The Iraqi Civil War following ISIS' invasion in 2014 caused hundreds of thousands of Iraqi internally displaced people to flee to the city. The city currently has Sunni, Shia, Assyrian/Chaldean/Syriacs, Armenians and mixed neighborhoods.