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 population at 85.0 million (midyear 2020 estimate). According to Iranian government estimates, Muslims constitute 99.4 percent of the population, of whom 90-95 percent are Shia, and 5-10 percent are Sunni, mostly Turkmen, Arabs, Baluchis, and Kurds, living in the northeast, southwest, southeast, and northwest provinces, respectively. Afghan refugees, economic migrants, and displaced persons also make up a significant Sunni population, but accurate statistics on the breakdown of the Afghan refugee population between Sunni and Shia are unavailable. There are no official statistics available on the number of Muslims who practice Sufism, although unofficial reports estimate several million.

According to U.S. government estimates, groups constituting the remaining less than 1 percent of the population include Baha’is, Christians, Yarsanis, Jews, Sabean-Mandaeans, and Zoroastrians. The three largest non-Muslim minorities are Baha’is, Christians, and Yarsanis.

According to Human Rights Watch data, Baha’is number at least 300,000.

The government Statistical Center of Iran reports there are 117,700 Christians in the country. Some estimates, however, suggest there may be many more than actually reported. According to World Christian Database statistics, there are approximately 547,000 Christians. Elam Ministries, a Christian organization, estimates there could be between 300,000 and one million.

Estimates by the Assyrian Church of the total Assyrian and Chaldean Christian population put their combined number at 7,000. There are also Protestant denominations, including evangelical groups, but there is no authoritative data on their numbers. Christian groups outside the country disagree on the size of the Protestant community, with some estimates citing figures lower than 10,000, and others, such as Open Doors USA, citing numbers greater than 800,000. Many Protestants and converts to Christianity from Islam reportedly practice in secret.

There is no official count of Yarsanis, but HRANA and the Center for Human Rights in Iran (CHRI) estimate there are up to two million. Yarsanis are mainly located in Loristan and the Kurdish regions.

According to recent estimates from Armenian Christians who maintain contact with the Iranian Christian community in the country, their current numbers are approximately 40,000 to 50,000, significantly lower than the peak of 300,000 estimated prior to 1979. The number of Roman Catholics in the country is estimated to be 21,000.

According to Zoroastrian groups and the government-run Statistical Center of Iran, the population includes approximately 25,000 Zoroastrians.

According to the Tehran Jewish Committee, the population includes approximately 9,000 Jews, while representatives from the Jewish community in the country estimated their number at 15,000 during a 2018 PBS News Hour interview.

The population, according to government media, includes 14,000 Sabean-Mandaeans.

According to the 2011 census, the number of individuals who are nonreligious rose by 20 percent between 2006 and 2011, which supports observations by academics and others that the number of atheists, agnostics, nonbelievers, and religiously unaffiliated living in the country is growing. Often these groups, however, do not publicly identify, as documented by Amnesty International’s report on the country, because those who profess atheism are at risk of arbitrary detention, torture, and the death penalty for “apostasy.”

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 8.7 million (midyear 2020 estimate). According to the country’s Central Bureau of Statistics (CBS) classification system, approximately 75 percent of the population is Jewish, 18 percent Muslim, 2 percent Christian, and 1.6 percent Druze. The remaining 4 percent consists of those the CBS classifies as “other.” This includes those who identify as Jewish but do not satisfy the Orthodox Jewish definition of “Jewish” the government uses for civil procedures, such as many immigrants from the former Soviet Union. There are also relatively small communities of Samaritans, Karaite Jews, Seventh-day Adventists, Messianic Jews, Jehovah’s Witnesses, and members of the Baha’i Faith. The majority of non-Jewish citizens are of Arab origin. This includes approximately 77 percent of the country’s 180,000 Christians, according to the CBS as of December. Non-Arab Christians are mainly those who emigrated from the former Soviet Union in the 1990s as descendants of Jews or alongside Jewish family members and their descendants.

According to the annual religion and state poll conducted by religious freedom NGO Hiddush, 60 percent of Jewish citizens do not affiliate with any religious group, 17 percent are “Zionist Orthodox,” 12 percent “ultra-Orthodox” (including 2 percent “Zionist ultra-Orthodox”), 7 percent “Reform,” and 4 percent “Conservative.”

Muslim, Druze, and Christian communities are located throughout the country. For example, in the Galilee region, some communities are homogenous, while others feature a mix of these groups. There are also dozens of Muslim-majority communities in the Negev. In addition to an Alawite community in Ghajar, there are several Druze communities in the Golan Heights.

The CBS estimates 563,200 Jews, 345,800 Muslims, and 12,850 Christians live in the current municipal boundaries of Jerusalem, accounting for approximately 99 percent of the city’s total population of 936,400 as of 2019.

According to government and NGO data, there are approximately 330,000 foreign workers in the country, including 97,000 documented Palestinian workers; 31,000 undocumented Palestinian workers; 98,000 migrant workers with permits, 77,000 non-Palestinian undocumented workers (either migrant workers without a permit or tourists who overstayed their visa); and 31,000 asylum seekers, of whom an unknown number work. Foreign workers and asylum seekers include Protestants, Roman Catholics, members of The Church of Jesus Christ of Latter-day Saints, Seventh-day Adventists, Orthodox Christians, Buddhists, Hindus, and Muslims. According to the Latin Patriarchate of Jerusalem, Catholics among the foreign worker population include 30,000 Filipinos, 15,000 Indians, 5,000 Sri Lankans, 2,500 Colombians, and 1,100 individuals from South American countries.

The U.S. government estimates the population at 10.9 million (midyear 2020 estimate). According to U.S. government estimates, Muslims, virtually all of whom are Sunni, make up 97.2 percent of the population. Some church leaders estimate Christians make up approximately 1.8 percent of the country’s population. Groups constituting less than 1 percent of the population include Buddhists, Baha’is, Hindus, and Druze (who are considered as Muslims by the government). According to the Royal Institute for Interfaith Studies (RIIFS), there is also a small community (consisting of a few families) of Zoroastrians. Most of the approximately one million migrant workers are from Egypt, South and Southeast Asia, and sub-Saharan Africa. Migrant workers from sub-Saharan Africa and South and Southeast Asia are often Christian or Hindu. There are an estimated 770,000 refugees registered with the UN High Commissioner for Refugees from 57 countries of origin, including more than 670,000 Syrians and 100,000 of other nationalities. The Syrian and Iraqi refugee populations are mostly Sunni Muslim. Shia Muslims and Christians account for less than one third of the Iraqi refugee population.

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 3.6 million (midyear 2020 estimate). The government’s National Center for Statistics and Information estimates the population at 4.5 million; citizens constitute 61 percent of the population (data as of December). The government does not publish statistics on the percentages of citizens who practice Ibadhi, Sunni, and Shia forms of Islam. In 2015 the Dubai-based al-Mesbar Center estimated Sunni Muslims at nearly 50 percent of the citizen population, Ibadhi Muslims at 45 percent, and Shia Muslims, Hindus, and Christians at a combined 5 percent.

Academic sources state the majority of non-Muslims are foreign workers from South Asia. Noncitizen religious groups include Hindus, Muslims, Buddhists, Sikhs, Baha’is, and Christians. Christians are centered in the major urban areas of Muscat, Sohar, and Salalah and include Roman Catholics, Eastern Orthodox, members of the Church of Jesus Christ, and Protestants.

The U.S. government estimates the country’s total population at 34.2 million (midyear 2020 estimate). In 2019, the UN estimated that approximately 38.3 percent of the country’s residents are foreigners. Between 85 and 90 percent of the approximately 21 million Saudi citizens are Sunni Muslims.

Shia Muslims constitute 10 to 12 percent of the citizen population and an estimated 25 to 30 percent of the Eastern Province’s population. Approximately 80 percent of Shia are “Twelvers” (Shia who recognize 12 imams) and are primarily located in the Eastern Province. The Nakhawala, or “Medina Shia,” are also Twelvers and reside in small numbers in the western Hejaz region. Estimates place their numbers at approximately 1,000. Twelver Shia adhere to the Ja’afari school of jurisprudence. Most of the remaining Shia are Sulaimani Ismailis, also known as “Seveners” (those who branched off from the Twelvers to follow Isma’il ibn Ja’afar as the Seventh Imam). Seveners number approximately 500,000 and reside primarily in Najran Province, where they are believed to constitute a majority of the province’s inhabitants. Another branch of Sevener Shia, the Bohra Ismailis, reportedly number several hundred, most of South Asian origin. Pockets of Zaydis, members of another branch of Shia Islam, numbering in total approximately 20,000, reside primarily in the provinces of Jizan and Najran along the border with Yemen.

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).

The U.S. government estimates the total population at 82.0 million (midyear 2020 estimate). According to the Turkish government, 99 percent of the population is Muslim, approximately 77.5 percent of which is Hanafi Sunni. Representatives of other religious groups estimate their members are 0.2 percent of the population, while the most recent public opinion surveys published in January 2019 by Turkish research firm KONDA suggest approximately 3 percent of the population self-identifies as atheist and 2 percent as nonbelievers.

Leaders of Alevi foundations estimate Alevis comprise 25 to 31 percent of the population; Pew Research Center reporting indicates 5 percent of Muslims state they are Alevis. The Shia Jafari community estimates its members make up 4 percent of the population.

Non-Muslim religious groups are mostly concentrated in Istanbul and other large cities, as well as in the southeast. Exact figures are not available; however, these groups self-report approximately 90,000 Armenian Apostolic Orthodox Christians (including migrants from Armenia), 25,000 Roman Catholics (including migrants from Africa and the Philippines), and 16,000 Jews. There are also approximately 25,000 Syrian Orthodox Christians (also known as Syriacs), 15,000 Russian Orthodox Christians (mostly immigrants from Russia who hold residence permits), and 10,000 Baha’is.

Estimates of other groups include 7,000-10,000 members of Protestant denominations, 5,000 Jehovah’s Witnesses, fewer than 3,000 Chaldean Christians, up to 2,500 Greek Orthodox Christians, and fewer than 1,000 Yezidis. There also are small, undetermined numbers of Bulgarian Orthodox, Nestorian, Georgian Orthodox, Ukrainian Orthodox, Syriac Catholic, Armenian Catholic, Chaldean Catholic, and Maronite Christians. The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ) estimates its membership at 300 individuals.

The U.S. government estimates the total Palestinian population at 2.9 million in the West Bank and 1.9 million in the Gaza Strip (midyear 2020 estimates). According to the U.S. government and other sources, Palestinian residents of these territories are predominantly Sunni Muslims, with small Shia and Ahmadi Muslim communities. The Israeli Central Bureau of Statistics reports an estimated 441,600 Jewish Israelis reside in Israeli settlements in the West Bank. According to various estimates, 50,000 Christian Palestinians reside in the West Bank and Jerusalem, and according to media reports and religious communities, there are at most 1,000 Christians residing in Gaza. According to local Christian leaders, Palestinian Christian emigration has continued at rapid rates. A majority of Christians are Greek Orthodox; the remainder includes Roman Catholics, Melkite Greek Catholics, Syrian Orthodox, Armenian Orthodox, Armenian Catholics, Coptic Orthodox, Maronites, Ethiopian Orthodox, Syrian Catholics, Episcopalians, Lutherans, other Protestant denominations, including evangelical Christians, and small numbers of members of The Church of Jesus Christ of Latter-day Saints and Jehovah’s Witnesses. Christians are concentrated primarily in Bethlehem, Ramallah, and Nablus; smaller communities exist elsewhere. Approximately 360 Samaritans (practitioners of Samaritanism, which is related to but distinct from Judaism) reside in the West Bank, primarily in the Nablus area.

The Israeli Central Bureau of Statistics estimates 563,200 Jews, 345,800 Muslims, and 12,850 Christians live in Jerusalem, accounting for approximately 99 percent of the city’s total population of 936,400, as of 2019.

The U.S. government estimates the total population at 29.8 million (midyear 2020 estimate). More than 99 percent of the population is Muslim (2010 estimate), associating their beliefs with either the Shafi’i order of Sunni Islam or Zaydi Islam, a distinct form of Shia Islam. There are also significant numbers of Sunni followers of the Maliki and Hanbali schools, and significant numbers of Ismaili and Twelver followers of Shia Islam. While there are no official statistics, the U.S. government estimates 65 percent of the population is Sunni and 35 percent Zaydi. Baha’is, Jews, Hindus, and Christians, many of whom are refugees or temporary foreign residents, comprise less than 1 percent of the population. Christian groups include Roman Catholics and Anglicans. According to the UN Group of Experts, many Ethiopian and Eritrean Christian economic migrants transit the country on their way to find work in Saudi Arabia, making the total number of Christians subject to fluctuation.

There is no firm estimate of the number of persons of Indian origin or of those who practice Hinduism, Sikhism, or the Dawoodi Bohra variant of Ismaili Shia Islam residing in the country. The preconflict Hindu population was 150,000 (2010 estimate), concentrated in Aden, Mukalla, Shihr, Lahaj, Mokha, and Hudayah. According to one source, the current number of Indian nationals is fewer than 3,000. Many members of the Indian-origin community have resided in the country for generations and hold Yemeni nationality.

The Jewish community is an indigenous non-Muslim minority religious group. Reports estimate approximately 20 to 40 Jews remain, concentrated in Sana’a and Raydah, in Amran Governorate north of Sana’a.