| Russia |  | Islam | Russian Orthodox 15-20%, Muslim 10-15%, other Christian 2% (2006 est.) |
| Canada |  | Islam | Roman Catholic 42.6%, Protestant 23.3% (including United Church 9.5%, Anglican 6.8%, Baptist 2.4%, Lutheran 2%), other Christian 4.4%, Muslim 1.9%, other and unspecified 11.8%, none 16% (2001 census) |
| United States |  | Islam | Protestant 51.3%, Roman Catholic 23.9%, Mormon 1.7%, other Christian 1.6%, Jewish 1.7%, Buddhist 0.7%, Muslim 0.6%, other or unspecified 2.5%, unaffiliated 12.1%, none 4% (2007 est.) |
| China |  | Islam | Daoist (Taoist), Buddhist, Christian 3%-4%, Muslim 1%-2% |
| Australia |  | Islam | Catholic 25.8%, Anglican 18.7%, Uniting Church 5.7%, Presbyterian and Reformed 3%, Eastern Orthodox 2.7%, other Christian 7.9%, Buddhist 2.1%, Muslim 1.7%, other 2.4%, unspecified 11.3%, none 18.7% (2006 Census) |
| India |  | Islam | Hindu 80.5%, Muslim 13.4%, Christian 2.3%, Sikh 1.9%, other 1.8%, unspecified 0.1% (2001 census) |
| Kazakhstan |  | Islam | Muslim 47%, Russian Orthodox 44%, Protestant 2%, other 7% |
| Saudi Arabia |  | Islam | Muslim 100% |
| Indonesia |  | Islam | Muslim 86.1%, Protestant 5.7%, Roman Catholic 3%, Hindu 1.8%, other or unspecified 3.4% (2000 census) |
| Iran |  | Islam, Shia Islam, Sunni Islam | Muslim 98% (Shia 89%, Sunni 9%), other (includes Zoroastrian, Jewish, Christian, and Baha'i) 2% |
| Mongolia |  | Islam | Buddhist Lamaist 50%, Shamanist and Christian 6%, Muslim 4%, none 40% (2004) |
| Chad |  | Islam | Muslim 53.1%, Catholic 20.1%, Protestant 14.2%, animist 7.3%, other 0.5%, unknown 1.7%, atheist 3.1% (1993 census) |
| Niger |  | Islam | Muslim 80%, other (includes indigenous beliefs and Christian) 20% |
| Mali |  | Islam | Muslim 90%, Christian 1%, indigenous beliefs 9% |
| South Africa |  | Islam | Zion Christian 11.1%, Pentecostal/Charismatic 8.2%, Catholic 7.1%, Methodist 6.8%, Dutch Reformed 6.7%, Anglican 3.8%, Muslim 1.5%, other Christian 36%, other 2.3%, unspecified 1.4%, none 15.1% (2001 census) |
| Ethiopia |  | Islam | Christian 60.8% (Orthodox 50.6%, Protestant 10.2%), Muslim 32.8%, traditional 4.6%, other 1.8% (1994 census) |
| Mauritania |  | Islam | Muslim 100% |
| Egypt |  | Islam, Sunni Islam | Muslim (mostly Sunni) 90%, Coptic 9%, other Christian 1% |
| Tanzania |  | Islam | mainland - Christian 30%, Muslim 35%, indigenous beliefs 35%;Zanzibar - more than 99% Muslim |
| Nigeria |  | Islam | Muslim 50%, Christian 40%, indigenous beliefs 10% |
| Mozambique |  | Islam | Catholic 23.8%, Muslim 17.8%, Zionist Christian 17.5%, other 17.8%, none 23.1% (1997 census) |
| Pakistan |  | Islam, Shia Islam, Sunni Islam | Muslim 95% (Sunni 75%, Shia 20%), other (includes Christian and Hindu) 5% |
| Turkey |  | Islam, Sunni Islam | Muslim 99.8% (mostly Sunni), other 0.2% (mostly Christians and Jews) |
| Zambia |  | Islam | Christian 50%-75%, Muslim and Hindu 24%-49%, indigenous beliefs 1% |
| Burma |  | Islam | Buddhist 89%, Christian 4% (Baptist 3%, Roman Catholic 1%), Muslim 4%, animist 1%, other 2% |
| France |  | Islam | Roman Catholic 83%-88%, Protestant 2%, Jewish 1%, Muslim 5%-10%, unaffiliated 4% overseas departments: Roman Catholic, Protestant, Hindu, Muslim, Buddhist, pagan |
| Ubangi-Shari |  | Islam | indigenous beliefs 35%, Protestant 25%, Roman Catholic 25%, Muslim 15% |
| Madagascar |  | Islam | indigenous beliefs 52%, Christian 41%, Muslim 7% |
| Kenya |  | Islam | Protestant 45%, Roman Catholic 33%, Muslim 10%, indigenous beliefs 10%, other 2% |
| Yemen |  | Islam, Shia Islam, Sunni Islam | Muslim including Shaf'i (Sunni) and Zaydi (Shia), small numbers of Jewish, Christian, and Hindu |
| Thailand |  | Islam | Buddhist 94.6%, Muslim 4.6%, Christian 0.7%, other 0.1% (2000 census) |
| Turkmenistan |  | Islam | Muslim 89%, Eastern Orthodox 9%, unknown 2% |
| Cameroon |  | Islam | indigenous beliefs 40%, Christian 40%, Muslim 20% |
| Sweden |  | Islam | Lutheran 87%, other (includes Roman Catholic, Orthodox, Baptist, Muslim, Jewish, and Buddhist) 13% |
| Uzbekistan |  | Islam | Muslim 88% (mostly Sunnis), Eastern Orthodox 9%, other 3% |
| Morocco |  | Islam | Muslim 98.7%, Christian 1.1%, Jewish 0.2% |
| Iraq |  | Islam, Shia Islam, Sunni Islam | Muslim 97% (Shia 60%-65%, Sunni 32%-37%), Christian or other 3% |
| Zimbabwe |  | Islam | syncretic (part Christian, part indigenous beliefs) 50%, Christian 25%, indigenous beliefs 24%, Muslim and other 1% |
| Germany |  | Islam | Protestant 34%, Roman Catholic 34%, Muslim 3.7%, unaffiliated or other 28.3% |
| Congo-Brazzaville |  | Islam | Christian 50%, animist 48%, Muslim 2% |
| Vietnam |  | Islam | Buddhist 9.3%, Catholic 6.7%, Hoa Hao 1.5%, Cao Dai 1.1%, Protestant 0.5%, Muslim 0.1%, none 80.8% (1999 census) |
| Malaysia |  | Islam | Muslim 60.4%, Buddhist 19.2%, Christian 9.1%, Hindu 6.3%, Confucianism, Taoism, other traditional Chinese religions 2.6%, other or unknown 1.5%, none 0.8% (2000 census) |
| Norway |  | Islam | Church of Norway 85.7%, Pentecostal 1%, Roman Catholic 1%, other Christian 2.4%, Muslim 1.8%, other 8.1% (2004) |
| Cote d'Ivoire |  | Islam | Muslim 38.6%, Christian 32.8%, indigenous 11.9%, none 16.7% (2008 est.) |
| Oman |  | Islam, Shia Islam, Sunni Islam | Ibadhi Muslim 75%, other (includes Sunni Muslim, Shia Muslim, Hindu) 25% |
| Italy |  | Islam | Roman Catholic 90% (approximately;about one-third practicing), other 10% (includes mature Protestant and Jewish communities and a growing Muslim immigrant community) |
| Philippines |  | Islam | Roman Catholic 80.9%, Muslim 5%, Evangelical 2.8%, Iglesia ni Kristo 2.3%, Aglipayan 2%, other Christian 4.5%, other 1.8%, unspecified 0.6%, none 0.1% (2000 census) |
| Burkina Faso |  | Islam | Muslim 50%, indigenous beliefs 40%, Christian (mainly Roman Catholic) 10% |
| Gabon |  | Islam | Christian 55%-75%, animist, Muslim less than 1% |
| Western Sahara |  | Islam | Muslim |
| Guinea |  | Islam | Muslim 85%, Christian 8%, indigenous beliefs 7% |
| United Kingdom |  | Islam | Christian (Anglican, Roman Catholic, Presbyterian, Methodist) 71.6%, Muslim 2.7%, Hindu 1%, other 1.6%, unspecified or none 23.1% (2001 census) |
| Uganda |  | Islam | Roman Catholic 41.9%, Protestant 42% (Anglican 35.9%, Pentecostal 4.6%, Seventh Day Adventist 1.5%), Muslim 12.1%, other 3.1%, none 0.9% (2002 census) |
| Ghana |  | Islam | Christian 68.8% (Pentecostal/Charismatic 24.1%, Protestant 18.6%, Catholic 15.1%, other 11%), Muslim 15.9%, traditional 8.5%, other 0.7%, none 6.1% (2000 census) |
| Romania |  | Islam | Eastern Orthodox (including all sub-denominations) 86.8%, Protestant (various denominations including Reformate and Pentecostal) 7.5%, Roman Catholic 4.7%, other (mostly Muslim) and unspecified 0.9%, none 0.1% (2002 census) |
| Guyana |  | Islam | Hindu 28.4%, Pentecostal 16.9%, Roman Catholic 8.1%, Anglican 6.9%, Seventh Day Adventist 5%, Methodist 1.7%, Jehovah Witness 1.1%, other Christian 17.7%, Muslim 7.2%, other 4.3%, none 4.3% (2002 census) |
| Belarus |  | Islam | Eastern Orthodox 80%, other (including Roman Catholic, Protestant, Jewish, and Muslim) 20% (1997 est.) |
| Kyrgyzstan |  | Islam | Muslim 75%, Russian Orthodox 20%, other 5% |
| Senegal |  | Islam | Muslim 94%, Christian 5% (mostly Roman Catholic), indigenous beliefs 1% |
| Syria |  | Alawi faith, Druze faith, Islam, Sunni Islam | Sunni Muslim 74%, other Muslim (includes Alawite, Druze) 16%, Christian (various denominations) 10%, Jewish (tiny communities in Damascus, Al Qamishli, and Aleppo) |
| Cambodia |  | Islam | Buddhist 96.4%, Muslim 2.1%, other 1.3%, unspecified 0.2% (1998 census) |
| Suriname |  | Islam | Hindu 27.4%, Protestant 25.2% (predominantly Moravian), Roman Catholic 22.8%, Muslim 19.6%, indigenous beliefs 5% |
| Tunisia |  | Islam | Muslim 98%, Christian 1%, Jewish and other 1% |
| Nepal |  | Islam | Hindu 80.6%, Buddhist 10.7%, Muslim 4.2%, Kirant 3.6%, other 0.9% (2001 census) |
| Bangladesh |  | Islam | Muslim 89.5%, Hindu 9.6%, other 0.9% (2004) |
| Greece |  | Islam | Greek Orthodox 98%, Muslim 1.3%, other 0.7% |
| Malawi |  | Islam | Christian 79.9%, Muslim 12.8%, other 3%, none 4.3% (1998 census) |
| Eritrea |  | Islam | Muslim, Coptic Christian, Roman Catholic, Protestant |
| Benin |  | Islam | Christian 42.8% (Catholic 27.1%, Celestial 5%, Methodist 3.2%, other Protestant 2.2%, other 5.3%), Muslim 24.4%, Vodoun 17.3%, other 15.5% (2002 census) |
| Liberia |  | Islam | Christian 40%, Muslim 20%, indigenous beliefs 40% |
| Bulgaria |  | Islam | Bulgarian Orthodox 82.6%, Muslim 12.2%, other Christian 1.2%, other 4% (2001 census) |
| Azerbaijan |  | Islam | Muslim 93.4%, Russian Orthodox 2.5%, Armenian Orthodox 2.3%, other 1.8% (1995 est.) |
| Austria |  | Islam | Roman Catholic 73.6%, Protestant 4.7%, Muslim 4.2%, other 3.5%, unspecified 2%, none 12% (2001 census) |
| Emirates |  | Islam, Shia Islam | Muslim 96% (Shia 16%), other (includes Christian, Hindu) 4% |
| Serbia |  | Islam | Serbian Orthodox 85%, Catholic 5.5%, Protestant 1.1%, Muslim 3.2%, unspecified 2.6%, other, unknown, or atheist 2.6% (2002 census) |
| Sierra Leone |  | Islam | Muslim 60%, Christian 10%, indigenous beliefs 30% |
| Georgia |  | Islam | Orthodox Christian 83.9%, Muslim 9.9%, Armenian-Gregorian 3.9%, Catholic 0.8%, other 0.8%, none 0.7% (2002 census) |
| Sri Lanka |  | Islam | Buddhist 69.1%, Muslim 7.6%, Hindu 7.1%, Christian 6.2%, unspecified 10% (2001 census provisional data) |
| Togo |  | Islam | Christian 29%, Muslim 20%, indigenous beliefs 51% |
| Croatia |  | Islam | Roman Catholic 87.8%, Orthodox 4.4%, other Christian 0.4%, Muslim 1.3%, other and unspecified 0.9%, none 5.2% (2001 census) |
| Bosnia and Herzegovina |  | Islam | Muslim 40%, Orthodox 31%, Roman Catholic 15%, other 14% |
| Denmark |  | Islam | Evangelical Lutheran 95%, other Christian (includes Protestant and Roman Catholic) 3%, Muslim 2% |
| Netherlands |  | Islam | Roman Catholic 30%, Dutch Reformed 11%, Calvinist 6%, other Protestant 3%, Muslim 5.8%, other 2.2%, none 42% (2006) |
| Switzerland |  | Islam | Roman Catholic 41.8%, Protestant 35.3%, Muslim 4.3%, Orthodox 1.8%, other Christian 0.4%, other 1%, unspecified 4.3%, none 11.1% (2000 census) |
| Guinea-Bissau |  | Islam | Muslim 50%, indigenous beliefs 40%, Christian 10% |
| Albania |  | Islam | Muslim 70%, Albanian Orthodox 20%, Roman Catholic 10% |
| Burundi |  | Islam | Christian 67% (Roman Catholic 62%, Protestant 5%), indigenous beliefs 23%, Muslim 10% |
| Rwanda |  | Islam | Roman Catholic 56.5%, Protestant 26%, Adventist 11.1%, Muslim 4.6%, indigenous beliefs 0.1%, none 1.7% (2001) |
| Macedonia |  | Islam | Macedonian Orthodox 64.7%, Muslim 33.3%, other Christian 0.37%, other and unspecified 1.63% (2002 census) |
| Djibouti |  | Islam | Muslim 94%, Christian 6% |
| Israel |  | Druze faith, Islam | Jewish 76.4%, Muslim 16%, Arab Christians 1.7%, other Christian 0.4%, Druze 1.6%, unspecified 3.9% (2004) |
| Slovenia |  | Islam | Catholic 57.8%, Muslim 2.4%, Orthodox 2.3%, other Christian 0.9%, unaffiliated 3.5%, other or unspecified 23%, none 10.1% (2002 census) |
| Fiji |  | Islam | Christian 64.5% (Methodist 34.6%, Roman Catholic 9.1%, Assembly of God 5.7%, Seventh Day Adventist 3.9%, Anglican 0.8%, other 10.4%), Hindu 27.9%, Muslim 6.3%, Sikh 0.3%, other or unspecified 0.3%, none 0.7% (2007 census) |
| Kuwait |  | Islam, Shia Islam, Sunni Islam | Muslim 85% (Sunni 70%, Shia 30%), other (includes Christian, Hindu, Parsi) 15% |
| Swaziland |  | Islam | Zionist 40% (a blend of Christianity and indigenous ancestral worship), Roman Catholic 20%, Muslim 10%, other (includes Anglican, Bahai, Methodist, Mormon, Jewish) 30% |
| Timor-Leste |  | Islam | Roman Catholic 98%, Muslim 1%, Protestant 1% (2005) |
| Montenegro |  | Islam | Orthodox 74.2%, Muslim 17.7%, Catholic 3.5%, other 0.6%, unspecified 3%, atheist 1% (2003 census) |
| Qatar |  | Islam | Muslim 77.5%, Christian 8.5%, other 14% (2004 census) |
| Kosovo |  | Islam | Muslim, Serbian Orthodox, Roman Catholic |
| Lebanon |  | Alawi faith, Druze faith, Islam, Ismaili faith, Shia Islam, Sunni Islam | Muslim 59.7% (Shia, Sunni, Druze, Isma'ilite, Alawite or Nusayri), Christian 39% (Maronite Catholic, Greek Orthodox, Melkite Catholic, Armenian Orthodox, Syrian Catholic, Armenian Catholic, Syrian Orthodox, Roman Catholic, Chaldean, Assyrian, Copt, Protestant), other 1.3% |
| Cyprus |  | Islam | Greek Orthodox 78%, Muslim 18%, other (includes Maronite and Armenian Apostolic) 4% |
| West Bank |  | Islam, Sunni Islam | Muslim 75% (predominantly Sunni), Jewish 17%, Christian and other 8% |
| Brunei |  | Islam | Muslim (official) 67%, Buddhist 13%, Christian 10%, other (includes indigenous beliefs) 10% |
| Trinidad and Tobago |  | Islam | Roman Catholic 26%, Hindu 22.5%, Anglican 7.8%, Baptist 7.2%, Pentecostal 6.8%, Muslim 5.8%, Seventh Day Adventist 4%, other Christian 5.8%, other 10.8%, unspecified 1.4%, none 1.9% (2000 census) |
| Luxembourg |  | Islam | Roman Catholic 87%, other (includes Protestant, Jewish, and Muslim) 13% (2000) |
| Mauritius |  | Islam | Hindu 48%, Roman Catholic 23.6%, Muslim 16.6%, other Christian 8.6%, other 2.5%, unspecified 0.3%, none 0.4% (2000 census) |
| Kiribati |  | Islam | Roman Catholic 52%, Protestant (Congregational) 40%, other (includes Seventh-Day Adventist, Muslim, Baha'i, Latter-day Saints, Church of God) 8% (1999) |
| Bahrain |  | Islam, Shia Islam, Sunni Islam | Muslim (Shia and Sunni) 81.2%, Christian 9%, other 9.8% (2001 census) |
| Singapore |  | Islam | Buddhist 42.5%, Muslim 14.9%, Taoist 8.5%, Hindu 4%, Catholic 4.8%, other Christian 9.8%, other 0.7%, none 14.8% (2000 census) |
| Seychelles |  | Islam | Roman Catholic 82.3%, Anglican 6.4%, Seventh Day Adventist 1.1%, other Christian 3.4%, Hindu 2.1%, Muslim 1.1%, other non-Christian 1.5%, unspecified 1.5%, none 0.6% (2002 census) |
| Mayotte |  | Islam | Muslim 97%, Christian (mostly Roman Catholic) 3% |
| Gaza Strip |  | Islam, Sunni Islam | Muslim (predominantly Sunni) 99.3%, Christian 0.7% |
| Christmas Island |  | Islam | Buddhist 36%, Muslim 25%, Christian 18%, other 21% (1997) |
| Gibraltar |  | Islam | Roman Catholic 78.1%, Church of England 7%, other Christian 3.2%, Muslim 4%, Jewish 2.1%, Hindu 1.8%, other or unspecified 0.9%, none 2.9% (2001 census) |
| EU |  | Islam | Roman Catholic, Protestant, Orthodox, Muslim, Jewish |
| DRC |  | Islam | Roman Catholic 50%, Protestant 20%, Kimbanguist 10%, Muslim 10%, other (includes syncretic sects and indigenous beliefs) 10% |
| The Gambia |  | Islam | Muslim 90%, Christian 8%, indigenous beliefs 2% |
| Sudan |  | Sunni Islam | Sunni Muslim 70% (in north), Christian 5% (mostly in south and Khartoum), indigenous beliefs 25% |
| Algeria |  | Sunni Islam | Sunni Muslim (state religion) 99%, Christian and Jewish 1% |
| Libya |  | Sunni Islam | Sunni Muslim 97%, other 3% |
| Afghanistan |  | Shia Islam, Sunni Islam | Sunni Muslim 80%, Shia Muslim 19%, other 1% |
| Somalia |  | Sunni Islam | Sunni Muslim |
| Tajikistan |  | Shia Islam, Sunni Islam | Sunni Muslim 85%, Shia Muslim 5%, other 10% (2003 est.) |
| Jordan |  | Druze faith, Shia Islam, Sunni Islam | 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 Shia Muslim and Druze populations) (2001 est.) |
| Comoros |  | Sunni Islam | Sunni Muslim 98%, Roman Catholic 2% |
| Maldives |  | Sunni Islam | Sunni Muslim |
| Cocos (Keeling) Islands |  | Sunni Islam | Sunni Muslim 80%, other 20% (2002 est.) |
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