According to information gathered by the CIA, Iraq is 97%
Muslim. Of that 97%, the specific numbers of Shia and Sunni Muslims
vary according to different reports, but are generally divided
around 60/40.
Around 3% of the Iraqi population practice Christianity.
Other religions practiced in Iraq include Yazidism, Mandaeism,
Judaism, Zoroastrianism, and the religions of the Shabak and Kakai
people, but these represent minorities among the Iraqi people.