The U.S. government estimates the population at 104.1 million (midyear 2020 estimate). Most experts and media sources estimate that approximately 90 percent of the population is Sunni Muslim and 10 percent is Christian (estimates range from 5 to 15 percent). Approximately 90 percent of Christians belong to the Coptic Orthodox Church, according to Christian leaders.

Other Christian communities together constitute less than 2 percent of the population. These include Anglican/Episcopalian, Armenian Apostolic, Catholic (Armenian, Chaldean, Melkite, Maronite, Latin, and Syrian), and Orthodox (Greek and Syrian) Churches. Most Protestant denominations are members of the umbrella group known as the Protestant Churches of Egypt (PCE), also known as the Evangelical Church Association. These include the Apostolic Grace, Apostolic, Assemblies of God, Baptists, Brethren, Christian Model Church (al-Mithaal al-Masihi), Church of Christ, Faith (al-Eyman), Gospel Missionary (al-Kiraaza bil Ingil), Grace (al-Ni’ma), Independent Apostolic, Message Church of Holland (ar-Risaala), Open Brethren, Pentecostal, Presbyterian, Revival of Holiness (Nahdat al-Qadaasa), and Seventh-Day Adventists. There are an estimated 1,000 to 1,500 Jehovah’s Witnesses and an estimated 150 members of The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), the vast majority of whom are expatriates. Christians reside throughout the country, although the percentage of Christians is higher in Upper Egypt and in some sections of Cairo and Alexandria, according to religious and civil society groups.

Scholars estimate that Shia Muslims comprise approximately 1 percent of the population. Baha’i representatives estimate the size of the community to be between 1,000 and 2,000 persons. There are very small numbers of Dawoodi Bohra Muslims, Ahmadi Muslims, and expatriate members of various groups.

According to a local Jewish nongovernmental organization (NGO), there are six to 10 Jews.

There are no reliable estimates of the number of atheists.

The U.S. government estimates the total population at 38.9 million (midyear 2019 estimate). According to 2010 government statistics – the most recent available – 97 percent of the population is Muslim. Shia Muslims, predominantly Arabs but also including Turkoman, Faili (Shia) Kurds, and others, constitute 55 to 60 percent of the population. Sunni Muslims are approximately 40 percent of the population, of which Arabs constitute 24 percent, Kurds 15 percent, and Turkomans the remaining 1 percent. Shia, although predominantly located in the south and east, are the majority in Baghdad and have communities in most parts of the country. Sunnis form the majority in the west, center, and north of the country.

According to Christian leaders as well as NGO and media reports, fewer than 250,000 Christians remain in the country, down from a pre-2002 population estimate of between 800,000 and 1.4 million persons. Approximately 67 percent of Christians are Chaldean Catholics (an eastern rite of the Roman Catholic Church), and nearly 20 percent are members of the Assyrian Church of the East. The remainder are Syriac Orthodox, Syriac Catholic, Armenian Catholic, Armenian Apostolic, Anglican, and other Protestants. There are approximately 2,000 registered members of evangelical Christian churches in the IKR, while an unknown number, mostly converts from Islam, practice secretly.

Yezidi leaders continue to report that most of the 400,000 to 500,000 Yezidis in the country reside in the north, with approximately 200,000 to 230,000 remaining displaced as of October 2020. The Shabak number between 350,000 and 400,000, three-fourths of whom are Shia. Most Sunni Shabak and some Shia Shabak reside in Ninewa. According to Kaka’i (also known as Yarsani) activists, their community has approximately 120,000 to 150,000 members located in the Ninewa Plain and in villages southeast of Kirkuk as well as in Diyala and Erbil. Estimates of the size of the Sabean-Mandean community vary, but according to Sabean-Mandean leaders, 10,000 to 15,000 members remain in Iraq, mainly in the south, with between 750 and 1,000 in the IKR and Baghdad. Armenian leaders report a population of approximately 7,000 Armenian Christians, both Armenian Apostolic Church (Armenian Orthodox) and Armenian Catholic. Baha’i leaders report fewer than 2,000 members, spread throughout the country in small groups, including approximately 500 in the IKR.

There are fewer than six adult members in the Baghdad Jewish community, according to a local Jewish community leader. In the IKR, there are approximately 80 Jewish families, according to the KRG international advocacy coordinator, although some Jewish families do not openly acknowledge their religion for fear of persecution, according to the KRG Ministry of Endowment and Religious Affairs (MERA) and NGO sources, and the number could be higher. According to the KRG MERA, there are approximately 60 Zoroastrian families in the IKR. Zoroastrian sources report there are approximately 20,000 to 25,000 Zoroastrians in the country.

According to the International Organization for Migration (IOM), approximately 1.2 million persons remain displaced within the country, predominantly in Ninewa, Dohuk, Erbil, Sulaymaniyah, and Kirkuk Governorates, compared with 1.5 million persons at the end of 2019. According to the KRG’s Joint Crisis Coordination Center, there are approximately 700,000 internally displaced persons (IDPs) in the IKR. Forty percent of IDPs throughout the country are Sunni Arabs, 30 percent Yezidis, 13 percent Kurds (of several religious affiliations), and 7 percent Christians. Other religious minorities comprise the remaining 10 percent.

According to the IOM, there were more than 205,000 IDPs in camps and approximately 104,000 in critical shelters throughout the country at year’s end.

The U.S. government estimates the total population at 5.5 million (midyear 2020 estimate). The Office of the UN High Commissioner for Refugees (UNHCR) and other organizations estimate the total population includes 4.5 million citizens and an estimated 1.5 million refugees fleeing the conflicts in Syria and Iraq, the vast majority of whom are Syrian, as well as a Palestinian refugee population present in the country for more than 70 years. United Nations Relief and Works Agency for Palestine Refugees in the Near East estimates there are more than 180,000 currently in the country.

Statistics Lebanon, an independent firm, estimates 67.8 percent of the citizen population is Muslim (31.9 percent Sunni, 31.2 percent Shia, and small percentages of Alawites and Ismailis). Statistics Lebanon estimates 32.4 percent of the population is Christian. Maronite Catholics are the largest Christian group, followed by Greek Orthodox. Other Christian groups include Greek Catholics (Melkites), Armenian Orthodox, Armenian Catholics, Syriac Orthodox, Syriac Catholics, Assyrians, Chaldean Catholics, Copts, Protestants (including Presbyterians, Baptists, and Seventh-day Adventists), Roman (Latin) Catholics, and members of The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ).

According to Statistics Lebanon, 4.5 percent of the population is Druze, concentrated in the rural, mountainous areas east and south of Beirut. There are also small numbers of Jews, Baha’is, Buddhists, and Hindus. The Jewish Community Council, which represents the country’s Jewish community, estimates 70 Jews reside in the country.

UNHCR reports that the refugees from Syria in the country are mainly Sunni Muslims, but also Shia Muslims, Christians, and Druze. Palestinians live in the country as UN-registered refugees in 12 camps and surrounding areas. They are mostly the descendants of refugees who entered the country in the 1940s and 1950s. Most are Sunni Muslims but some are Christians.

UNHCR states there are approximately 12,200 UNHCR-registered Iraqi refugees in the country. Refugees and foreign migrants from Iraq include mostly Sunni Kurds, Sunni and Shia Muslims, and Chaldeans. There are also Coptic Christians from Egypt and Sudan. According to the secretary-general of the Syriac League, a nongovernmental organization (NGO) that advocates for Syriac Christians in the country, approximately 4,000 Iraqi Christians of all denominations and 3,000 to 4,000 Coptic Christians reside in the country. According to the same NGO, the majority of Iraqi Christian refugees are not registered with UNHCR and so are not included in their count. The NGO noted that the population size of Iraqi Christians had decreased by 60 percent since 2019, largely because of emigration driven by the country’s economic crisis.

Persons from all religious groups emigrated from the country during the year, in large part due to the country’s deteriorating economic situation. There is anecdotal evidence that Christians constituted a significant portion of those who left the country, especially following the August 4 Beirut Port explosion, with some citing fears for their security and potential treatment in an unpredictable political environment as a reason for their departure.

The U.S. government estimates the total population at 19.3 million (midyear 2020 estimate). At year’s end, more than half of the country’s prewar population was displaced; there were approximately 5.6 million refugees registered with the Office of the UN High Commissioner for Refugees in neighboring countries as well as 6.6 million IDPs. Continued population displacement adds a degree of uncertainty to demographic analyses, but the U.S. government estimates 74 percent of the population is Sunni Muslim, which includes ethnic Arabs, Kurds, Circassians, Chechens, and some Turkomans. According to U.S. government estimates, other Muslim groups, including Alawites, Ismailis, and Shia, together constitute 13 percent of the population, while Druze constitute 3 percent.

The U.S. government estimates 10 percent of the population is Christian. However, there are reports that indicate that number was considerably lower – approximately 2.5 percent. Of the 1.5 million Christians who lived in the country prior to the war, it is estimated that only approximately one-third of them – or approximately 450,000 – remain. Before the civil war, there were small Jewish populations in Aleppo and Damascus, but in June, the Jewish Chronicle reported that there were no known Jews still living in Syria. There was also a Yezidi population of approximately 80,000 before the civil war.

Sunni Muslims are present throughout the country. Shia Muslims live mostly in rural areas, particularly in several majority-Shia towns in Idlib and Aleppo Governates. Twelver Shia Muslims generally live in and around Damascus, Aleppo, and Homs. The majority of Alawites live in the mountainous areas of the coastal Latakia Governorate, but they also live in the cities of Latakia, Tartous, Homs, and Damascus. The highest concentration of Ismaili Muslims is in the city of Salamiyeh, Hama Governorate.

Most Christians belong to autonomous Orthodox Churches, Eastern Catholic Churches, or the Assyrian Church of the East and other affiliated independent Nestorian Churches. Most Christians continue to live in and around Damascus, Aleppo, Homs, Hama, and Latakia, or in the Hasakah Governorate in the northeast of the country. While there were hundreds of thousands of Iraqi Christian refugees before the conflict, the majority of the Iraqi Christian population has moved to neighboring countries or returned to Iraq. Many Druze live in the Jabal al-Arab (Jabal al-Druze) region in the southern Sweida Governorate, where they constitute a majority of the local population. Yezidis previously lived in Aleppo, but now live mainly in northeast Syria areas controlled by Kurdish-led Syrian Democratic Forces (SDF).