Iraq is a tapestry of ancient faiths, from Mandaean river baptisms to Zoroastrian fire temples.
In short: While Iraq is predominantly Muslim, its religious landscape is defined by millennia of coexistence and displacement. From the ancient Mandaean reliance on flowing water for baptism to the recent resurgence of Zoroastrianism among Kurds, the country remains a complex mosaic of ethnoreligious traditions that have survived shifting political tides.
Iraq’s religious history stretches back to the dawn of civilization in Mesopotamia, where Sumerian and Akkadian deities shaped a coherent tradition that persisted for millennia. Today, the nation is approximately 95% to 98% Muslim, with a Shia majority of about 55% and a Sunni population of roughly 40%. This demographic split is deeply tied to the country's geopolitical history with Iran, though the two sects share significant pilgrimage sites, such as the al-Askari Mosque in Samarra and the tomb of Imam Ali in Najaf.
Beyond Islam, Iraq hosts diverse, ancient communities. Mandaeans, who consider themselves followers of John the Baptist, have practiced their faith in southern Iraq for roughly 2,000 years. Their rituals require total immersion in flowing water, making the Tigris and Euphrates rivers central to their identity. Similarly, the Yazidi community, concentrated in the Nineveh Governorate, has faced immense hardship following the 2014 genocide by the Islamic State. Meanwhile, Zoroastrianism—once dominant in Northern Mesopotamia—has seen a recent rebirth among Kurds, with the first official fire temple in Iraqi Kurdistan opening in 2016.
The 20th and 21st centuries brought dramatic shifts for Iraq's religious minorities. The Jewish population, which numbered up to 450,000 in 1948, dwindled to a few hundred following mass emigration and political upheaval. Christians, who trace their presence back to the 40s AD, also saw their numbers collapse from an estimated 1.5 million before 2003 to fewer than 150,000 by 2023. These changes reflect the volatile intersection of state ideology, conflict, and the enduring, often precarious, survival of Iraq's oldest traditions.
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Sources
- Summary by Intellect · source: Religion in Iraq
- Also: Wikidata — religion in Iraq · CC0
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