| Country | Population | Percentage of Muslims | Muslim Population |
| Indonesia | 231,328,092 | 88.0% | 203,568,721 |
| Pakistan | 147,663,429 | 97.0% | 143,233,526 |
| India | 1,045,845,226 | 12.0% | 125,501,427 |
| Bangladesh | 133,376,684 | 83.0% | 110,702,648 |
| Turkey | 67,308,928 | 99.8% | 67,174,310 |
| Egypt | 70,712,345 | 94.0% | 66,469,604 |
| Iran | 66,622,704 | 99.0% | 65,956,477 |
| Nigeria | 129,934,911 | 50.0% | 64,967,456 |
| Ehtiopia | 67,673,031 | 47.5% | 32,144,690 |
| Morocco | 31,167,783 | 98.7% | 30,762,602 |
Special Registration for Homeland Security: (25) Afghanistan, Algeria, Bahrain, Bangladesh, Egypt, Eritrea, Indonesia, Iran, Iraq, Jordan, Kuwait, Lebanon, Libya, Morocco, North Korea, Oman, Pakistan, Qatar, Saudi Arabia, Somalia, Sudan, Syria, Tunisia, United Arab Emirates and Yemen (Source; Homeland Security)
Group - Arab Bank for Economic Development in Africa (ABEDA)
Established - 18 February 1974; effective - 16 September 1974
Aim - to promote economic development
Members - (17 plus the Palestine Liberation Organization) Algeria, Bahrain,
Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania, Morocco, Oman, Qatar,
Saudi Arabia, Sudan, Syria, Tunisia, UAE, Palestine Liberation Organization;
note - these are all the members of the Arab League excluding Comoros, Djibouti,
Somalia, Yemen
Group - Arab Fund for Economic and Social Development (AFESD)
Established - 16 May 1968
Aim - to promote economic and social development
Members - (20 plus the Palestine Liberation Organization) Algeria, Bahrain,
Djibouti, Egypt, Iraq (suspended 1993), Jordan, Kuwait, Lebanon, Libya, Mauritania,
Morocco, Oman, Qatar, Saudi Arabia, Somalia (suspended 1993), Sudan, Syria,
Tunisia, UAE, Yemen, Palestine Liberation Organization
Group - Arab League (AL) aka League of Arab States
Established - 22 March 1945
Aim - to promote economic, social, political, and military cooperation
Members - (21 plus the Palestine Liberation Organization) Algeria, Bahrain,
Comoros, Djibouti, Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania,
Morocco, Oman, Qatar, Saudi Arabia, Somalia, Sudan, Syria, Tunisia, UAE, Yemen,
Palestine Liberation Organization
Group - Arab Monetary Fund (AMF)
Established - 27 April 1976; effective - 2 February 1977
Aim - to promote Arab cooperation, development, and integration in monetary
and economic affairs
Members - (21 plus the Palestine Liberation Organization) Algeria, Bahrain,
Comoros, Djibouti, Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania,
Morocco, Oman, Qatar, Saudi Arabia, Somalia, Sudan, Syria, Tunisia, UAE, Yemen,
Palestine Liberation Organization
| Arab Associations | Special Registration |
Country
|
Muslim
Pop. over 40%
|
| Yes | Afghanistan | Sunni Muslim 84%, Shi'a Muslim 15%, other 1% | |
| Albania | Muslim 70%, Albanian Orthodox 20%, Roman Catholic 10%
note: all mosques and churches were closed in 1967 and religious observances prohibited; in November 1990, Albania began allowing private religious practice |
||
|
ABEDA, AL, AFESD, AMF |
Yes | Algeria | Muslim (state religion) 99%, Christian and Jewish 1% |
| Azerbaijan | Muslim 93.4%, Russian Orthodox 2.5%, Armenian Orthodox
2.3%, other 1.8% (1995 est.) note: religious affiliation is still nominal in Azerbaijan; percentages for actual practicing adherents are much lower |
||
| ABEDA, AL, AFESD, AMF | Yes | Bahrain | Shi'a Muslim 70%, Sunni Muslim 30% |
| Yes | Bangladesh | Muslim 83%, Hindu 16%, other 1% (1998) | |
| Bosnia and Herzegovina | Muslim 40%, Orthodox 31%, Roman Catholic 15%, Protestant 4%, other 10% | ||
| Brunei | Muslim (official) 67%, Buddhist 13%, Christian 10%, indigenous beliefs and other 10% | ||
| Burkina Faso | indigenous beliefs 40%, Muslim 50%, Christian (mainly Roman Catholic) 10% | ||
| Chad | Muslim 51%, Christian 35%, animist 7%, other 7% | ||
| Cocos (Keeling) Islands | Sunni Muslim 80%, other 20% (2002 est.) | ||
| AL, AMF | Comoros | Sunni Muslim 98%, Roman Catholic 2% | |
| Cote d'Ivoire | Christian 20-30%, Muslim 35-40%, indigenous 25-40% (2001)
note: the majority of foreigners (migratory workers) are Muslim (70%) and Christian (20%) |
||
| AL, AFESD, AMF | Djibouti | Muslim 94%, Christian 6% | |
| ABEDA, AL, AFESD, AMF | Yes | Egypt | Muslim (mostly Sunni) 94%, Coptic Christian and other 6% |
| Yes | Eritrea | Muslim, Coptic Christian, Roman Catholic, Protestant | |
| Ethiopia | Muslim 45%-50%, Ethiopian Orthodox 35%-40%, animist 12%, other 3%-8% | ||
| Gambia, The | Muslim 90%, Christian 9%, indigenous beliefs 1% | ||
| AMF, AL, AFESD, ABEDA | Gaza Strip | Muslim (predominantly Sunni) 98.7%, Christian 0.7%, Jewish 0.6% | |
| Guinea | Muslim 85%, Christian 8%, indigenous beliefs 7% | ||
| Guinea-Bissau | indigenous beliefs 50%, Muslim 45%, Christian 5% | ||
| Yes | Indonesia | Muslim 88%, Protestant 5%, Roman Catholic 3%, Hindu 2%, Buddhist 1%, other 1% (1998) | |
| Yes | Iran | Shi'a Muslim 89%, Sunni Muslim 10%, Zoroastrian, Jewish, Christian, and Baha'i 1% | |
| ABEDA, AL, AFESD, AMF | Yes | Iraq | Muslim 97% (Shi'a 60%-65%, Sunni 32%-37%), Christian or other 3% |
| Italy | predominately Roman Catholic with mature Protestant and Jewish communities and a growing Muslim immigrant community | ||
| ABEDA, AL, AFESD, AMF | Yes | Jordan | Sunni Muslim 92%, Christian 6% (majority Greek Orthodox, but some Greek and Roman Catholics, Syrian Orthodox, Coptic Orthodox, Armenian Orthodox, and Protestant denominations), other 2% (several small Shi'a Muslim and Druze populations) (2001 est.) |
| Kazakhstan | Muslim 47%, Russian Orthodox 44%, Protestant 2%, other 7% | ||
| ABEDA, AL, AFESD, AMF | Yes | Kuwait | Muslim 85% (Sunni 70%, Shi'a 30%), Christian, Hindu, Parsi, and other 15% |
| Kyrgyzstan | Muslim 75%, Russian Orthodox 20%, other 5% | ||
| ABEDA, AL, AFESD, AMF | Yes | Lebanon | Muslim 70% (including Shi'a, Sunni, Druze, Isma'ilite, Alawite or Nusayri), Christian 30% (including Orthodox Christian, Catholic, Protestant), Jewish NEGL% |
| ABEDA, AL, AFESD, AMF | Yes | Libya | Sunni Muslim 97% |
| Malaysia | Muslim, Buddhist, Daoist, Hindu, Christian, Sikh; note - in addition, Shamanism is practiced in East Malaysia | ||
| Maldives | Sunni Muslim | ||
| Mali | Muslim 90%, indigenous beliefs 9%, Christian 1% | ||
|
ABEDA, AL, AFESD, AMF |
Mauritania | Muslim 100% | |
| Mayotte | Muslim 97%, Christian (mostly Roman Catholic) | ||
| Mongolia | Tibetan Buddhist Lamaism 96%, Muslim (primarily in the southwest), Shamanism, and Christian 4% (1998) | ||
| ABEDA, AL, AFESD, AMF | Yes | Morocco | Muslim 98.7%, Christian 1.1%, Jewish 0.2% |
| Niger | Muslim 80%, remainder indigenous beliefs and Christian | ||
| Nigeria | Muslim 50%, Christian 40%, indigenous beliefs 10% | ||
|
ABEDA, AL, AFESD, AMF |
Yes | Oman | Ibadhi Muslim 75%, Sunni Muslim, Shi'a Muslim, Hindu |
| Yes | Pakistan | Muslim 97% (Sunni 77%, Shi'a 20%), Christian, Hindu, and other 3% | |
|
ABEDA, AL, AFESD, AMF |
Yas | Qatar | Muslim 95% |
| Reunion | Roman Catholic 86%, Hindu, Muslim, Buddhist (1995) | ||
| Russia | Russian Orthodox, Muslim, other | ||
|
ABEDA, AL, AFESD, AMF |
Yes | Saudi Arabia | Muslim 100% |
| Senegal | Muslim 94%, indigenous beliefs 1%, Christian 5% (mostly Roman Catholic) | ||
| Sierra Leone | Muslim 60%, indigenous beliefs 30%, Christian 10% | ||
| Singapore | Buddhist (Chinese), Muslim (Malays), Christian, Hindu, Sikh, Taoist, Confucianist | ||
| AL, AFESD, AMF | Yes | Somalia | Sunni Muslim |
|
ABEDA, AL, AFESD, AMF |
Yes | Sudan | Sunni Muslim 70% (in north), indigenous beliefs 25%, Christian 5% (mostly in south and Khartoum) |
| Sweden | Lutheran 87%, Roman Catholic, Orthodox, Baptist, Muslim, Jewish, Buddhist | ||
|
ABEDA, AL, AFESD, AMF |
Yes | Syria | Sunni Muslim 74%, Alawite, Druze, and other Muslim sects 16%, Christian (various sects) 10%, Jewish (tiny communities in Damascus, Al Qamishli, and Aleppo) |
| Tajikistan | Sunni Muslim 85%, Shi'a Muslim 5% | ||
|
ABEDA, AL, AFESD, AMF |
Yes | Tunisia | Muslim 98%, Christian 1%, Jewish and other 1% |
| Turkey | Muslim 99.8% (mostly Sunni), other 0.2% (mostly Christians and Jews) | ||
| Turkmenistan | Muslim 89%, Eastern Orthodox 9%, unknown 2% | ||
|
ABEDA, AL, AFESD, AMF |
Yes | United Arab Emirates | Muslim 96% (Shi'a 16%), Christian, Hindu, and other 4% |
| Uzbekistan | Muslim 88% (mostly Sunnis), Eastern Orthodox 9%, other 3% | ||
| Vietnam | Buddhist, Hoa Hao, Cao Dai, Christian (predominantly Roman Catholic, some Protestant), indigenous beliefs, Muslim | ||
| AMF, AL, AFESD, ABEDA | West Bank | Muslim 75% (predominantly Sunni), Jewish 17%, Christian and other 8% | |
| Western Sahara | Muslim | ||
| World | Christians 32.79% (of which Roman Catholics 17.33%, Protestants 5.62%, Orthodox 3.51%, Anglicans 1.31%), Muslims 19.6%, Hindus 13.31%, Buddhists 5.88%, Sikhs 0.38%, Jews 0.24%, other religions 12.83%, non-religious 12.53%, atheists 2.44% (2001 est.) | ||
| AL, AFESD | Yes | Yemen | Muslim including Shaf'i (Sunni) and Zaydi (Shi'a), small numbers of Jewish, Christian, and Hindu |