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Afghanistan
Muslim 99.7% (Sunni 84.7 - 89.7%, Shia 10 - 15%), other 0.3% (2009 est.)
Albania
Muslim 56.7%, Roman Catholic 10%, Orthodox 6.8%, atheist 2.5%, Bektashi (a Sufi order) 2.1%, other 5.7%, unspecified 16.2% (2011 est.)

note: all mosques and churches were closed in 1967 and religious observances prohibited; in November 1990, Albania began allowing private religious practice

Algeria
Muslim (official; predominantly Sunni) 99%, other (includes Christian and Jewish) <1% (2012 est.)
American Samoa
Christian 98.3%, other 1%, unaffiliated 0.7% (2010 est.)
Andorra
Roman Catholic (predominant)
Angola
Roman Catholic 41.1%, Protestant 38.1%, other 8.6%, none 12.3% (2014 est.)
Anguilla
Protestant 73.2% (includes Anglican 22.7%, Methodist 19.4%, Pentecostal 10.5%, Seventh Day Adventist 8.3%, Baptist 7.1%, Church of God 4.9%, Presbytarian 0.2%, Brethren 0.1%), Roman Catholic 6.8%, Jehovah's Witness 1.1%, other Christian 10.9%, other 3.2%, unspecified 0.3%, none 4.5% (2011 est.)
Antigua and Barbuda
Protestant 68.3% (Anglican 17.6%, Seventh Day Adventist 12.4%, Pentecostal 12.2%, Moravian 8.3%, Methodist 5.6%, Wesleyan Holiness 4.5%, Church of God 4.1%, Baptist 3.6%), Roman Catholic 8.2%, other 12.2%, unspecified 5.5%, none 5.9% (2011 est.)
Argentina
nominally Roman Catholic 92% (less than 20% practicing), Protestant 2%, Jewish 2%, other 4%
Armenia
Armenian Apostolic 92.6%, Evangelical 1%, other 2.4%, none 1.1%, unspecified 2.9% (2011 est.)
Aruba
Roman Catholic 75.3%, Protestant 4.9% (includes Methodist 0.9%, Adventist 0.9%, Anglican 0.4%, other Protestant 2.7%), Jehovah's Witness 1.7%, other 12%, none 5.5%, unspecified 0.5% (2010 est.)
Australia
Protestant 23.1% (Anglican 13.3%, Uniting Church 3.7%, Presbyterian and Reformed 2.3%, Baptist 1.5%, Pentecostal 1.1%, Lutheran .7%, other Protestant .5%), Roman Catholic 22.6%, other Christian 4.2%, Muslim 2.6%, Buddhist 2.4%, Orthodox 2.3% (Eastern Orthodox 2.1%, Oriental Orthodox .2%), Hindu 1.9%, other 1.3%, none 30.1%, unspecified 9.6% (2016 est.)
Austria
Catholic 73.8% (includes Roman Catholic 73.6%, other Catholic 0.2%), Protestant 4.9%, Muslim 4.2%, Orthodox 2.2%, other 0.8% (includes other Christian), none 12%, unspecified 2% (2001 est.)
Azerbaijan
Muslim 96.9% (predominantly Shia), Christian 3%, other <0.1, unaffiliated <0.1 (2010 est.)

note: religious affiliation is still nominal in Azerbaijan, percentages for actual practicing adherents are much lower

Bahamas, The
Protestant 69.9% (includes Baptist 34.9%, Anglican 13.7%, Pentecostal 8.9% Seventh Day Adventist 4.4%, Methodist 3.6%, Church of God 1.9%, Brethren 1.6%, other Protestant .9%), Roman Catholic 12%, other Christian 13% (includes Jehovah's Witness 1.1%), other 0.6%, none 1.9%, unspecified 2.6% (2010 est.)
Bahrain
Muslim 73.7%, Christian 9.3%, Jewish 0.1%, other 16.9% (2017 est.)
Bangladesh
Muslim 89.1%, Hindu 10%, other 0.9% (includes Buddhist, Christian) (2013 est.)
Barbados
Protestant 66.4% (includes Anglican 23.9%, other Pentecostal 19.5%, Adventist 5.9%, Methodist 4.2%, Wesleyan 3.4%, Nazarene 3.2%, Church of God 2.4%, Baptist 1.8%, Moravian 1.2%, other Protestant 0.9%), Roman Catholic 3.8%, other Christian 5.4% (includes Jehovah's Witness 2.0%, other 3.4%), Rastafarian 1%, other 1.5%, none 20.6%, unspecified 1.2% (2010 est.)
Belarus
Orthodox 48.3%, Catholic 7.1%, other 3.5%, non-believers 41.1% (2011 est.)
Belgium
Roman Catholic 50%, Protestant and other Christian 2.5%, Muslim 5%, Jewish 0.4%, Buddhist 0.3%, atheist 9.2%, none 32.6% (2009 est.)
Belize
Roman Catholic 40.1%, Protestant 31.5% (includes Pentecostal 8.4%, Seventh Day Adventist 5.4%, Anglican 4.7%, Mennonite 3.7%, Baptist 3.6%, Methodist 2.9%, Nazarene 2.8%), Jehovah's Witness 1.7%, other 10.5% (includes Baha'i, Buddhist, Hindu, Mormon, Muslim, Rastafarian, Salvation Army), unspecified 0.6%, none 15.5% (2010 est.)
Benin
Muslim 27.7%, Roman Catholic 25.5%, Protestant 13.5% (Celestial 6.7%, Methodist 3.4%, other Protestant 3.4%), Vodoun 11.6%, other Christian 9.5%, other traditional religions 2.6%, other 2.6%, none 5.8% (2013 est.)
Bermuda
Protestant 46.2% (includes Anglican 15.8%, African Methodist Episcopal 8.6%, Seventh Day Adventist 6.7, Pentecostal 3.5%, Methodist 2.7%, Presbyterian 2.0%, Church of God 1.6%, Baptist 1.2%, Salvation Army 1.1%, Brethren 1.0%, other Protestant 2.0%), Roman Catholic 14.5%, Jehovah's Witness 1.3%, other Christian 9.1%, Muslim 1%, other 3.9%, none 17.8%, unspecified 6.2% (2010 est.)
Bhutan
Lamaistic Buddhist 75.3%, Indian- and Nepalese-influenced Hinduism 22.1%, other 2.6% (2005 est.)
Bolivia
Roman Catholic 76.8%, Evangelical and Pentecostal 8.1%, Protestant 7.9%, other 1.7%, none 5.5% (2012 est.)
Bosnia and Herzegovina
Muslim 50.7%, Orthodox 30.7%, Roman Catholic 15.2%, atheist 0.8%, agnostic 0.3%, other 1.2%, undeclared/no answer 1.1% (2013 est.)
Botswana
Christian 79.1%, Badimo 4.1%, other 1.4% (includes Baha'i, Hindu, Muslim, Rastafarian), none 15.2%, unspecified 0.3% (2011 est.)
Brazil
Roman Catholic 64.6%, other Catholic 0.4%, Protestant 22.2% (includes Adventist 6.5%, Assembly of God 2.0%, Christian Congregation of Brazil 1.2%, Universal Kingdom of God 1.0%, other Protestant 11.5%), other Christian 0.7%, Spiritist 2.2%, other 1.4%, none 8%, unspecified 0.4% (2010 est.)
British Virgin Islands
Protestant 70.2% (Methodist 17.6%, Church of God 10.4%, Anglican 9.5%, Seventh Day Adventist 9.0%, Pentecostal 8.2%, Baptist 7.4%, New Testament Church of God 6.9%, other Protestant 1.2%), Roman Catholic 8.9%, Jehovah's Witness 2.5%, Hindu 1.9%, other 6.2%, none 7.9%, unspecified 2.4% (2010 est.)
Brunei
Muslim (official) 78.8%, Christian 8.7%, Buddhist 7.8%, other (includes indigenous beliefs) 4.7% (2011 est.)
Bulgaria
Eastern Orthodox 59.4%, Muslim 7.8%, other (including Catholic, Protestant, Armenian Apostolic Orthodox, and Jewish) 1.7%, none 3.7%, unspecified 27.4% (2011 est.)
Burkina Faso
Muslim 61.5%, Roman Catholic 23.3%, traditional/animist 7.8%, Protestant 6.5%, other/no answer 0.2%, none 0.7% (2010 est.)
Burma
Buddhist 87.9%, Christian 6.2%, Muslim 4.3%, Animist 0.8%, Hindu 0.5%, other 0.2%, none 0.1% (2014 est.)

note: religion estimate is based on the 2014 national census, including an estimate for the non-enumerated population of Rakhine State, which is assumed to mainly affiliate with the Islamic faith

Burundi
Roman Catholic 62.1%, Protestant 23.9% (includes Adventist 2.3% and other Protestant 21.6%), Muslim 2.5%, other 3.6%, unspecified 7.9% (2008 est.)
Cambodia
Buddhist (official) 97.9%, Muslim 1.1%, Christian 0.5%, other 0.6% (2013 est.)
Cameroon
Roman Catholic 38.4%, Protestant 26.3%, other Christian 4.5%, Muslim 20.9%, animist 5.6%, other 1%, non-believer 3.2% (2005 est.)
Canada
Catholic 39% (includes Roman Catholic 38.8%, other Catholic .2%), Protestant 20.3% (includes United Church 6.1%, Anglican 5%, Baptist 1.9%, Lutheran 1.5%, Pentecostal 1.5%, Presbyterian 1.4%, other Protestant 2.9%), Orthodox 1.6%, other Christian 6.3%, Muslim 3.2%, Hindu 1.5%, Sikh 1.4%, Buddhist 1.1%, Jewish 1%, other 0.6%, none 23.9% (2011 est.)
Cape Verde
Roman Catholic 77.3%, Protestant 4.6% (includes Church of the Nazarene 1.7%, Adventist 1.5%, Assembly of God 0.9%, Universal Kingdom of God 0.4%, and God and Love 0.1%), other Christian 3.4% (includes Christian Rationalism 1.9%, Jehovah's Witness 1%, and New Apostolic 0.5%), Muslim 1.8%, other 1.3%, none 10.8%, unspecified 0.7% (2010 est.)
Cayman Islands
Protestant 67.8% (includes Church of God 22.6%, Seventh Day Adventist 9.4%, Presbyterian/United Church 8.6%, Baptist 8.3%, Pentecostal 7.1%, non-denominational 5.3%, Anglican 4.1%, Wesleyan Holiness 2.4%), Roman Catholic 14.1%, Jehovah's Witness 1.1%, other 7%, none 9.3%, unspecified 0.7% (2010 est.)
Central African Republic
indigenous beliefs 35%, Protestant 25%, Roman Catholic 25%, Muslim 15% (2018)

note: animistic beliefs and practices strongly influence the Christian majority

Chad
Muslim 52.1%, Protestant 23.9%, Roman Catholic 20%, animist 0.3%, other Christian 0.2%, none 2.8%, unspecified 0.7% (2014-15 est.)
Chile
Roman Catholic 66.7%, Evangelical or Protestant 16.4%, Jehovah's Witness 1%, other 3.4%, none 11.5%, unspecified 1.1% (2012 est.)
China
Buddhist 18.2%, Christian 5.1%, Muslim 1.8%, folk religion 21.9%, Hindu < 0.1%, Jewish < 0.1%, other 0.7% (includes Daoist (Taoist)), unaffiliated 52.2% (2010 est.)

note: officially atheist

Christmas Island
Muslim 19.4%, Buddhist 18.3%, Roman Catholic 8.8%, Protestant 6.5% (includes Anglican 3.6%, Uniting Church 1.2%, other 1.7%), other Christian 3.3%, other 0.6%, none 15.3%, unspecified 27.7% (2016 est.)
Cocos (Keeling) Islands
Muslim (predominantly Sunni) 75%, Anglican 3.5%, Roman Catholic 2.2%, none 12.9%, unspecified 6.3% (2016 est.)
Colombia
Roman Catholic 79%, Protestant 14% (includes Pentecostal 6%, mainline Protestant 2%, other 6%), other 2%, unspecified 5% (2014 est.)
Comoros
Sunni Muslim 98%, other (including Shia Muslim, Roman Catholic, Jehovah's Witness, Protestant) 2%

note: Sunni Islam is the state religion

Congo, Democratic Republic of the
Roman Catholic 29.9%, Protestant 26.7%, Kimbanguist 2.8%, other Christian 36.5%, Muslim 1.3%, other (includes syncretic sects and indigenous beliefs) 1.2%, none 1.3%, unspecified .2% (2014 est.)
Congo, Republic of the
Roman Catholic 33.1%, Awakening Churches/Christian Revival 22.3%, Protestant 19.9%, Salutiste 2.2%, Muslim 1.6%, Kimbanguiste 1.5%, other 8.1%, none 11.3% (2010 est.)
Cook Islands
Protestant 62.8% (Cook Islands Christian Church 49.1%, Seventh Day Adventist 7.9%, Assemblies of God 3.7%, Apostolic Church 2.1%), Roman Catholic 17%, Mormon 4.4%, other 8%, none 5.6%, no response 2.2% (2011 est.)
Costa Rica
Roman Catholic 71.8%, Evangelical and Pentecostal 12.3%, other Protestant 2.6%, Jehovah's Witness 0.5%, other 2.4%, none 10.4% (2016 est.)
Cote d'Ivoire
Muslim 42.9%, Catholic 17.2%, Evangelical 11.8%, Methodist 1.7%, other Christian 3.2%, animist 3.6%, other religion 0.5%, none 19.1% (2014 est.)

note: the majority of foreign migrant workers are Muslim (72.7%) and Christian (17.7%)

Croatia
Roman Catholic 86.3%, Orthodox 4.4%, Muslim 1.5%, other 1.5%, unspecified 2.5%, not religious or atheist 3.8% (2011 est.)
Cuba
Christian 59.2%, folk 17.4%, other .4%, none 23% (2010 est.)

note: folk religion includes religions of African origin, spiritualism, and others intermingled with Catholicism or Protestantism; data is estimative because no authoritative source on religious affiliation exists in Cuba

Cyprus
Orthodox Christian 89.1%, Roman Catholic 2.9%, Protestant/Anglican 2%, Muslim 1.8%, Buddhist 1%, other (includes Maronite, Armenian Church, Hindu) 1.4%, unknown 1.1%, none/atheist 0.6% (2011 est.)

note: data represent only the government-controlled area of Cyprus

Czech Republic
Roman Catholic 10.4%, Protestant (includes Czech Brethren and Hussite) 1.1%, other and unspecified 54%, none 34.5% (2011 est.)
Denmark
Evangelical Lutheran (official) 74.7%, Muslim 5.5%, other/none/unspecified (denominations of less than 1% each in descending order of size include Roman Catholic, Jehovah's Witness, Serbian Orthodox Christian, Jewish, Baptist, Buddhist, Mormon, Pentecostal, and nondenominational Christian) 19.8% (2019 est.)
Djibouti
Sunni Muslim 94% (nearly all Djiboutians), Christian 6% (mainly foreign-born residents)
Dominica
Roman Catholic 61.4%, Protestant 28.6% (includes Evangelical 6.7%, Seventh Day Adventist 6.1%, Pentecostal 5.6%, Baptist 4.1%, Methodist 3.7%, Church of God 1.2%, other 1.2%), Rastafarian 1.3%, Jehovah's Witness 1.2%, other 0.3%, none 6.1%, unspecified 1.1% (2001 est.)
Dominican Republic
Roman Catholic 47.8%, Protestant 21.3%, other 2.2%, none 28%, don't know/no response .7% (2017 est.)
East Timor
Roman Catholic 97.6%, Protestant/Evangelical 2%, Muslim 0.2%, other 0.2% (2015 est.)
Ecuador
Roman Catholic 74%, Evangelical 10.4%, Jehovah's Witness 1.2%, other 6.4% (includes Mormon, Buddhist, Jewish, Spiritualist, Muslim, Hindu, indigenous, African American, Pentecostal), atheist 7.9%, agnostic 0.1% (2012 est.)

note: data represent persons at least 16 years of age from five Ecuadoran cities

Egypt
Muslim (predominantly Sunni) 90%, Christian (majority Coptic Orthodox, other Christians include Armenian Apostolic, Catholic, Maronite, Orthodox, and Anglican) 10% (2015 est.)
El Salvador
Roman Catholic 50%, Protestant 36%, other 2%, none 12% (2014 est.)
Equatorial Guinea
nominally Christian and predominantly Roman Catholic, Muslim, Baha'i, animist, indigenous
Eritrea
Sunni Muslim, Coptic Christian, Roman Catholic, Protestant
Estonia
Orthodox 16.2%, Lutheran 9.9%, other Christian (including Methodist, Seventh-Day Adventist, Roman Catholic, Pentecostal) 2.2%, other 0.9%, none 54.1%, unspecified 16.7% (2011 est.)
Ethiopia
Ethiopian Orthodox 43.5%, Muslim 33.9%, Protestant 18.5%, traditional 2.7%, Catholic 0.7%, other 0.6% (2007 est.)
Falkland Islands (Islas Malvinas)
Christian 57.1%, other 1.6%, none 35.4%, unspecified 6% (2016 est.)
Faroe Islands
Christian 89.3% (predominantly Evangelical Lutheran), other 1%, none 3.8%, unspecified 6% (2011 est.)
Fiji
Protestant 45% (Methodist 34.6%, Assembly of God 5.7%, Seventh Day Adventist 3.9%, and Anglican 0.8%), Hindu 27.9%, other Christian 10.4%, Roman Catholic 9.1%, Muslim 6.3%, Sikh 0.3%, other 0.3%, none 0.8% (2007 est.)
Finland
Lutheran 69.8%, Greek Orthodox 1.1%, other 1.7%, unspecified 27.4% (2018 est.)
France
Christian (overwhelmingly Roman Catholic) 63-66%, Muslim 7-9%, Buddhist 0.5-0.75%, Jewish 0.5-0.75%, other 0.5-1.0%, none 23-28% (2015 est.)

note: France maintains a tradition of secularism and has not officially collected data on religious affiliation since the 1872 national census, which complicates assessments of France's religious composition; an 1872 law prohibiting state authorities from collecting data on individuals' ethnicity or religious beliefs was reaffirmed by a 1978 law emphasizing the prohibition of the collection or exploitation of personal data revealing an individual's race, ethnicity, or political, philosophical, or religious opinions; a 1905 law codified France's separation of church and state

French Polynesia
Protestant 54%, Roman Catholic 30%, other 10%, no religion 6%
Gabon
Roman Catholic 42.3%, Protestant 12.3%, other Christian 27.4%, Muslim 9.8%, animist 0.6%, other 0.5%, none/no answer 7.1% (2012 est.)
Gambia, The
Muslim 95.7%, Christian 4.2%, none 0.1%, no response 0.1% (2013 est.)
Gaza Strip
Muslim 98.0 - 99.0% (predominantly Sunni), Christian <1.0%, other, unaffiliated, unspecified <1.0% (2012 est.)

note: dismantlement of Israeli settlements was completed in September 2005; Gaza has had no Jewish population since then

Georgia
Orthodox (official) 83.4%, Muslim 10.7%, Armenian Apostolic 2.9%, other 1.2% (includes Catholic, Jehovah's Witness, Yazidi, Protestant, Jewish), none 0.5%, unspecified/no answer 1.2% (2014 est.)
Germany
Roman Catholic 28.2%, Protestant 26%, Muslim 5%, Orthodox 1.9%, other Christian 1.1%, other .9%, none 37% (2017 est.)
Ghana
Christian 71.2% (Pentecostal/Charismatic 28.3%, Protestant 18.4%, Catholic 13.1%, other 11.4%), Muslim 17.6%, traditional 5.2%, other 0.8%, none 5.2% (2010 est.)
Gibraltar
Roman Catholic 72.1%, Church of England 7.7%, other Christian 3.8%, Muslim 3.6%, Jewish 2.4%, Hindu 2%, other 1.1%, none 7.1%, unspecified 0.1% (2012 est.)
Greece
Greek Orthodox (official) 81-90%, Muslim 2%, other 3%, none 4-15%, unspecified 1% (2015 est.)
Greenland
Evangelical Lutheran, traditional Inuit spiritual beliefs
Grenada
Protestant 49.2% (includes Pentecostal 17.2%, Seventh Day Adventist 13.2%, Anglican 8.5%, Baptist 3.2%, Church of God 2.4%, Evangelical 1.9%, Methodist 1.6%, other 1.2%), Roman Catholic 36%, Jehovah's Witness 1.2%, Rastafarian 1.2%, other 5.5%, none 5.7%, unspecified 1.3% (2011 est.)
Guam
Roman Catholic 85%, other 15% (1999 est.)
Guatemala
Roman Catholic, Protestant, indigenous Maya
Guernsey
Protestant (Anglican, Presbyterian, Baptist, Congregational, Methodist), Roman Catholic
Guinea
Muslim 89.1%, Christian 6.8%, animist 1.6%, other .1%, none 2.4% (2014 est.)
Guinea-Bissau
Muslim 45.1%, Christian 22.1%, animist 14.9%, none 2%, unspecified 15.9% (2008 est.)
Guyana
Protestant 34.8% (Pentecostal 22.8%, Seventh Day Adventist 5.4%, Anglican 5.2%, Methodist 1.4%), Hindu 24.8%, Roman Catholic 7.1%, Muslim 6.8%, Jehovah's Witness 1.3%, Rastafarian 0.5%, other Christian 20.8%, other 0.9%, none 3.1% (2012 est.)
Haiti
Roman Catholic 54.7%, Protestant 28.5% (Baptist 15.4%, Pentecostal 7.9%, Adventist 3%, Methodist 1.5%, other 0.7%), Vodou 2.1%, other 4.6%, none 10.2% (2003 est.)

note: many Haitians practice elements of Vodou in addition to another religion, most often Roman Catholicism; Vodou was recognized as an official religion in 2003

Holy See (Vatican City)
Roman Catholic
Honduras
Roman Catholic 46%, Protestant 41%, atheist 1%, other 2%, none 9% (2014 est.)
Hong Kong
Buddhist or Taoist 27.9%, Protestant 6.7%, Roman Catholic 5.3%, Muslim 4.2%, Hindu 1.4%, Sikh 0.2%, other or none 54.3% (2016 est.)

note: many people practice Confucianism, regardless of their religion or not having a religious affiliation

Hungary
Roman Catholic 37.2%, Calvinist 11.6%, Lutheran 2.2%, Greek Catholic 1.8%, other 1.9%, none 18.2%, no response 27.2% (2011 est.)
Iceland
Evangelical Lutheran Church of Iceland (official) 67.2%, Roman Catholic 3.9%, Reykjavik Free Church 2.8%, Hafnarfjordur Free Church 2%, Asatru Association 1.2%, The Independent Congregation .9%, other religions 4% (includes Zuist and Pentecostal), none 6.7%, other or unspecified 11.3% (2018 est.)
India
Hindu 79.8%, Muslim 14.2%, Christian 2.3%, Sikh 1.7%, other and unspecified 2% (2011 est.)
Indonesia
Muslim 87.2%, Protestant 7%, Roman Catholic 2.9%, Hindu 1.7%, other 0.9% (includes Buddhist and Confucian), unspecified 0.4% (2010 est.)
Iran
Muslim (official) 99.4% (Shia 90-95%, Sunni 5-10%), other (includes Zoroastrian, Jewish, and Christian) 0.3%, unspecified 0.4% (2011 est.)
Iraq
Muslim (official) 95-98% (Shia 64-69%, Sunni 29-34%), Christian 1% (includes Catholic, Orthodox, Protestant, Assyrian Church of the East), other 1-4% (2015 est.)

note: while there has been voluntary relocation of many Christian families to northern Iraq, the overall Christian population has decreased at least 50% and perhaps as high as 90% since the fall of the SADDAM Husayn regime in 2003, according to US Embassy estimates, with many fleeing to Syria, Jordan, and Lebanon

Ireland
Roman Catholic 78.3%, Church of Ireland 2.7%, other Christian 1.6%, Orthodox 1.3%, Muslim 1.3%, other 2.4%, none 9.8%, unspecified 2.6% (2016 est.)
Isle of Man
Protestant (Anglican, Methodist, Baptist, Presbyterian, Society of Friends), Roman Catholic
Israel
Jewish 74.7%, Muslim 17.7%, Christian 2%, Druze 1.6%, other 4% (2016 est.)
Italy
Christian 83.3% (overwhelmingly Roman Catholic with very small groups of Jehovah's Witnesses and Protestants), Muslim 3.7%, unaffiliated 12.4%, other 0.6% (2010 est.)
Jamaica
Protestant 64.8% (includes Seventh Day Adventist 12.0%, Pentecostal 11.0%, Other Church of God 9.2%, New Testament Church of God 7.2%, Baptist 6.7%, Church of God in Jamaica 4.8%, Church of God of Prophecy 4.5%, Anglican 2.8%, United Church 2.1%, Methodist 1.6%, Revived 1.4%, Brethren 0.9%, and Moravian 0.7%), Roman Catholic 2.2%, Jehovah's Witness 1.9%, Rastafarian 1.1%, other 6.5%, none 21.3%, unspecified 2.3% (2011 est.)
Japan
Shintoism 70.4%, Buddhism 69.8%, Christianity 1.5%, other 6.9% (2015 est.)

note: total adherents exceeds 100% because many people practice both Shintoism and Buddhism

Jersey
Protestant (Anglican, Baptist, Congregational New Church, Methodist, Presbyterian), Roman Catholic
Jordan
Muslim 97.2% (official; predominantly Sunni), Christian 2.2% (majority Greek Orthodox, but some Greek and Roman Catholics, Syrian Orthodox, Coptic Orthodox, Armenian Orthodox, and Protestant denominations), Buddhist 0.4%, Hindu 0.1%, Jewish <0.1, folk <0.1, unaffiliated <0.1, other <0.1 (2010 est.)
Kazakhstan
Muslim 70.2%, Christian 26.2% (mainly Russian Orthodox), other 0.2%, atheist 2.8%, unspecified 0.5% (2009 est.)
Kenya
Christian 83% (Protestant 47.7%, Catholic 23.4%, other Christian 11.9%), Muslim 11.2%, Traditionalists 1.7%, other 1.6%, none 2.4%, unspecified 0.2% (2009 est.)
Kiribati
Roman Catholic 57.3%, Kiribati Uniting Church 31.3%, Mormon 5.3%, Baha'i 2.1%, Seventh Day Adventist 1.9%, other 2.1% (2015 est.)
Korea, North
traditionally Buddhist and Confucianist, some Christian and syncretic Chondogyo (Religion of the Heavenly Way)

note: autonomous religious activities now almost nonexistent; government-sponsored religious groups exist to provide illusion of religious freedom

Korea, South
Protestant 19.7%, Buddhist 15.5%, Catholic 7.9%, none 56.9% (2015 est.)

note: many people also carry on at least some Confucian traditions and practices

Kosovo
Muslim 95.6%, Roman Catholic 2.2%, Orthodox 1.5%, other 0.1%, none 0.1%, unspecified 0.6% (2011 est.)
Kuwait
Muslim (official) 74.6%, Christian 18.2%, other and unspecified 7.2% (2013 est.)

note: data represent the total population; about 69% of the population consists of immigrants

Kyrgyzstan
Muslim 90% (majority Sunni), Christian 7% (Russian Orthodox 3%), other 3% (includes Jewish, Buddhist, Baha'i) (2017 est.)
Laos
Buddhist 64.7%, Christian 1.7%, none 31.4%, other/not stated 2.1% (2015 est.)
Latvia
Lutheran 36.2%, Roman Catholic 19.5%, Orthodox 19.1%, other Christian 1.6%, other 0.1%, unspecified/none 23.5% (2017 est.)
Lebanon
Muslim 57.7% (28.7% Sunni, 28.4% Shia, smaller percentages of Alawites and Ismailis), Christian 36.2% (Maronite Catholics are the largest Christian group), Druze 5.2%, very small numbers of Jews, Baha'is, Buddhists, and Hindus (2017 est.)

note: data represent the religious affiliation of the citizen population (data do not include Lebanon's sizable Syrian and Palestinian refugee populations) ; 18 religious sects recognized

Lesotho
Protestant 47.8% (Pentecostal 23.1%, Lesotho Evangelical 17.3%, Anglican 7.4%), Roman Catholic 39.3%, other Christian 9.1%, non-Christian 1.4%, none 2.3% (2014 est.)
Liberia
Christian 85.6%, Muslim 12.2%, Traditional 0.6%, other 0.2%, none 1.5% (2008 est.)
Libya
Muslim (official; virtually all Sunni) 96.6%, Christian 2.7%, Buddhist 0.3%, Hindu <0.1, Jewish <0.1, folk religion <0.1, unafilliated 0.2%, other <0.1 (2010 est.)

note: non-Sunni Muslims include native Ibadhi Muslims (<1% of the population) and foreign Muslims

Liechtenstein
Roman Catholic (official) 73.4%, Protestant Reformed 6.3%, Muslim 5.9%,  Christian Orthodox 1.3%, Lutheran 1.2%, other Protestant .7%, other Christian .3%, other .8%, none 7%, unspecified 3.3% (2015 est.)
Lithuania
Roman Catholic 77.2%, Russian Orthodox 4.1%, Old Believer 0.8%, Evangelical Lutheran 0.6%, Evangelical Reformist 0.2%, other (including Sunni Muslim, Jewish, Greek Catholic, and Karaite) 0.8%, none 6.1%, unspecified 10.1% (2011 est.)
Luxembourg
Christian (predominantly Roman Catholic) 70.4%, Muslim 2.3%, other (includes Buddhist, folk religions, Hindu, Jewish) 0.5%, none 26.8% (2010 est.)
Macau
folk religionist 58.9%, Buddhist 17.3%, Christian 7.2%, other 1.2%, none 15.4% (2010 est.)
Macedonia
Macedonian Orthodox 64.8%, Muslim 33.3%, other Christian 0.4%, other and unspecified 1.5% (2002 est.)
Madagascar
Christian, indigenous, Muslim
Malawi
Protestant 33.5% (includes Church of Central Africa Presbyterian 14.2%, Seventh Day Adventist/Baptist 9.4%, Pentecostal 7.6%, Anglican 2.3%), Roman Catholic 17.2%, other Christian 26.6%, Muslim 13.8%, traditionalist 1.1%, other 5.6%, none 2.1% (2018 est.)
Malaysia
Muslim (official) 61.3%, Buddhist 19.8%, Christian 9.2%, Hindu 6.3%, Confucianism, Taoism, other traditional Chinese religions 1.3%, other 0.4%, none 0.8%, unspecified 1% (2010 est.)
Maldives
Sunni Muslim (official)
Mali
Muslim 93.9%, Christian 2.8%, Animist .7%, none 2.5% (2018 est.)
Malta
Roman Catholic (official) more than 90% (2006 est.)
Marshall Islands
Protestant 80.5% (United Church of Christ 47%, Assembly of God 16.2%, Bukot Nan Jesus 5.4%, Full Gospel 3.3%, Reformed Congressional Church 3%, Salvation Army 1.9%, Seventh Day Adventist 1.4%, Meram in Jesus 1.2%, other Protestant 1.1%), Roman Catholic 8.5%, Mormon 7%, Jehovah's Witness 1.7%,  other 1.2%, none 1.1% (2011 est.)
Mauritania
Muslim (official) 100%
Mauritius
Hindu 48.5%, Roman Catholic 26.3%, Muslim 17.3%, other Christian 6.4%, other 0.6%, none 0.7%, unspecified 0.1% (2011 est.)
Mexico
Roman Catholic 82.7%, Pentecostal 1.6%, Jehovah's Witness 1.4%, other Evangelical Churches 5%, other 1.9%, none 4.7%, unspecified 2.7% (2010 est.)
Micronesia, Federated States of
Roman Catholic 54.7%, Protestant 41.1% (includes Congregational 38.5%, Baptist 1.1%, Seventh Day Adventist 0.8%, Assembly of God 0.7%), Mormon 1.5%, other 1.9%, none 0.7%, unspecified 0.1% (2010 est.)
Moldova
Orthodox 90.1%, other Christian 2.6%, other 0.1%, agnostic (2014 est.)
Monaco
Roman Catholic 90% (official), other 10%
Mongolia
Buddhist 53%, Muslim 3%, Shamanist 2.9%, Christian 2.2%, other 0.4%, none 38.6% (2010 est.)
Montenegro
Orthodox 72.1%, Muslim 19.1%, Catholic 3.4%, atheist 1.2%, other 1.5%, unspecified 2.6% (2011 est.)
Montserrat
Protestant 67.1% (includes Anglican 21.8%, Methodist 17%, Pentecostal 14.1%, Seventh Day Adventist 10.5%, and Church of God 3.7%), Roman Catholic 11.6%, Rastafarian 1.4%, other 6.5%, none 2.6%, unspecified 10.8% (2001 est.)
Morocco
Muslim 99% (official; virtually all Sunni, <0.1% Shia), other 1% (includes Christian, Jewish, and Baha'i); note - Jewish about 6,000 (2010 est.)
Mozambique
Roman Catholic 27.2%, Muslim 18.9%, Zionist Christian 15.6%, Evangelical/Pentecostal 15.3%, Anglican 1.7%, other 4.8%, none 13.9%, unspecified 2.5% (2017 est.)
Namibia
Christian 80% to 90% (at least 50% Lutheran), indigenous beliefs 10% to 20%
Nauru
Protestant 60.4% (includes Nauru Congregational 35.7%, Assembly of God 13%, Nauru Independent Church 9.5%, Baptist 1.5%, and Seventh Day Adventist 0.7%), Roman Catholic 33%, other 3.7%, none 1.8%, unspecified 1.1% (2011 est.)
Nepal
Hindu 81.3%, Buddhist 9%, Muslim 4.4%, Kirant 3.1%, Christian 1.4%, other 0.5%, unspecified 0.2% (2011 est.)
Netherlands
Roman Catholic 23.6%, Protestant 14.9% (includes Dutch Reformed 6.4%, Protestant Church of The Netherlands 5.6%, Calvinist 2.9%), Muslim 5.1%, other 5.6% (includes Hindu, Buddhist, Jewish), none 50.7% (2017 est.)
New Caledonia
Roman Catholic 60%, Protestant 30%, other 10%
New Zealand
Christian 37.3% (Catholic 10.1%, Anglican 6.8%, Presbyterian and Congregational 5.2%, Pentecostal 1.8%, Methodist 1.6%, Mormon 1.2%, other 10.7%), Hindu 2.7%, Maori 1.3%, Muslim, 1.3%, Buddhist 1.1%, other religion 1.6% (includes Judaism, Spiritualism and New Age religions, Baha'i, Asian religions other than Buddhism), no religion 48.6%, objected to answering 6.7% (2018 est.)

note: based on the 2018 census of the usually resident population; percentages add up to more than 100% because respondents were able to identify more than one religion

Nicaragua
Roman Catholic 50%, Evangelical 33.2%, other 2.9%, unspecified 13.2%, none 0.7% (2017 est.)
Niger
Muslim 99.3%, Christian 0.3%, animist 0.2%, none 0.1% (2012 est.)
Nigeria
Muslim 53.5%, Roman Catholic 10.6%, other Christian 35.3%, other .6% (2018 est.)
Niue
Ekalesia Niue (Congregational Christian Church of Niue - a Protestant church founded by missionaries from the London Missionary Society) 67%, other Protestant 3% (includes Seventh Day Adventist 1%, Presbyterian 1%, and Methodist 1%), Mormon 10%, Roman Catholic 10%, Jehovah's Witnesses 2%, other 6%, none 2% (2011 est.)
Norfolk Island
Protestant 46.8% (Anglican 33.6%, Uniting Church in Australia 12.8%, Seventh Day Adventist 3.2%), Roman Catholic 12.6%, other Christian 2.9%, other 1.4%, none 26.7%, unspecified 9.5% (2016 est.)
Northern Mariana Islands
Christian (Roman Catholic majority, although traditional beliefs and taboos may still be found)
Norway
Church of Norway (Evangelical Lutheran - official) 70.6%, Muslim 3.2%, Roman Catholic 3%, other Christian 3.7%, other 2.5%, unspecified 17% (2016 est.)
Oman
Muslim 85.9%, Christian 6.5%, Hindu 5.5%, Buddhist 0.8%, Jewish <0.1%, other 1%, unaffiliated 0.2% (2010 est.)

note: Omani citizens represent approximately 56.4% of the population and are overwhelming Muslim (Ibadhi and Sunni sects each constitute about 45% and Shia about 5%); Christians, Hindus, and Buddhists account for roughly 5% of Omani citizens

Pakistan
Muslim (official) 96.4% (Sunni 85-90%, Shia 10-15%), other (includes Christian and Hindu) 3.6% (2010 est.)
Palau
Roman Catholic 45.3%, Protestant 34.9% (includes Evangelical 26.4%, Seventh Day Adventist 6.9%, Assembly of God .9%, Baptist .7%), Modekngei 5.7% (indigenous to Palau), Muslim 3%, Mormon 1.5%, other 9.7% (2015 est.)
Panama
Roman Catholic 85%, Protestant 15%
Papua New Guinea
Protestant 64.3% (Evangelical Lutheran 18.4%, Seventh Day Adventist 12.9%, Pentecostal 10.4%, United Church 10.3%, Evangelical Alliance 5.9%, Anglican 3.2%, Baptist 2.8%, Salvation Army .4%), Roman Catholic 26%, other Christian 5.3%, non-Christian 1.4%, unspecified 3.1% (2011 est.)
note: data represent only the citizen population; roughly .3% of the population are non-citizens, consisting of Christian 52% (predominantly Roman Catholic), other 10.7% , none 37.3%
Paraguay
Roman Catholic 89.6%, Protestant 6.2%, other Christian 1.1%, other or unspecified 1.9%, none 1.1% (2002 census)
Peru
Roman Catholic 60%, Christian 14.6% (includes evangelical 11.1%, other 3.5%), other .3%, none 4%, unspecified 21.1% (2017 est.)
Philippines
Roman Catholic 80.6%, Protestant 8.2% (includes Philippine Council of Evangelical Churches 2.7%, National Council of Churches in the Philippines 1.2%, other Protestant 4.3%), other Christian 3.4%, Muslim 5.6%, tribal religions .2%, other 1.9%, none .1% (2010 est.)
Pitcairn Islands
Seventh-Day Adventist 100%
Poland
Catholic 85.9% (includes Roman Catholic 85.6% and Greek Catholic, Armenian Catholic, and Byzantine-Slavic Catholic .3%), Orthodox 1.3% (almost all are Polish Autocephalous Orthodox), Protestant 0.4% (mainly Augsburg Evangelical and Pentacostal), other 0.4% (includes Jehovah's Witness, Buddhist, Hare Krishna, Gaudiya Vaishnavism, Muslim, Jewish, Mormon), unspecified 12.1% (2017 est.)
Portugal
Roman Catholic 81%, other Christian 3.3%, other (includes Jewish, Muslim) 0.6%, none 6.8%, unspecified 8.3% (2011 est.)

note: represents population 15 years of age and older

Puerto Rico
Roman Catholic 85%, Protestant and other 15%
Qatar
Muslim 67.7%, Christian 13.8%, Hindu 13.8%, Buddhist 3.1%, folk religion <.1%, Jewish <.1%, other 0.7%, unaffiliated 0.9% (2010 est.)
Romania
Eastern Orthodox (including all sub-denominations) 81.9%, Protestant (various denominations including Reformed and Pentecostal) 6.4%, Roman Catholic 4.3%, other (includes Muslim) 0.9%, none or atheist 0.2%, unspecified 6.3% (2011 est.)
Russia
Russian Orthodox 15-20%, Muslim 10-15%, other Christian 2% (2006 est.)

note: estimates are of practicing worshipers; Russia has large populations of non-practicing believers and non-believers, a legacy of over seven decades of official atheism under Soviet rule; Russia officially recognizes Orthodox Christianity, Islam, Judaism, and Buddhism as the country's traditional religions

Rwanda
Protestant 49.5% (includes Adventist 11.8% and other Protestant 37.7%), Roman Catholic 43.7%, Muslim 2%, other 0.9% (includes Jehovah's Witness), none 2.5%, unspecified 1.3% (2012 est.)
Saint Barthelemy
Roman Catholic, Protestant, Jehovah's Witnesses
Saint Helena
Protestant 75.9% (includes Anglican 68.9, Baptist 2.1%, Seventh Day Adventist 1.8%, Salvation Army 1.7%, New Apostolic 1.4%), Jehovah's Witness 4.1%, Roman Catholic 1.2%, other 2.5% (includes Baha'i), unspecified 0.8%, none 6.1%, no response 9.4% (2016 est.)

note: data represent Saint Helena only

Saint Kitts and Nevis
Protestant 74.4% (includes Anglican 20.6%, Methodist 19.1%, Pentecostal 8.2%, Church of God 6.8%, Moravian 5.5%, Baptist 4.8%, Seventh Day Adventist 4.7%, Evangelical 2.6%, Bretheren 1.8%, other .3%), Roman Catholic 6.7%, Rastafarian 1.7%, Jehovah's Witness 1.3%, other 7.6%, none 5.2%, unspecified 3.2% (2001 est.)
Saint Lucia
Roman Catholic 61.5%, Protestant 25.5% (includes Seventh Day Adventist 10.4%, Pentecostal 8.9%, Baptist 2.2%, Anglican 1.6%, Church of God 1.5%, other Protestant 0.9%), other Christian 3.4% (includes Evangelical 2.3% and Jehovah's Witness 1.1%), Rastafarian 1.9%, other 0.4%, none 5.9%, unspecified 1.4% (2010 est.)
Saint Martin
Roman Catholic, Jehovah's Witness, Protestant, Hindu
Saint Pierre and Miquelon
Roman Catholic 99%, other 1%
Saint Vincent and the Grenadines
Protestant 75% (Pentecostal 27.6%, Anglican 13.9%, Seventh Day Adventist 11.6%,  Baptist 8.9%, Methodist 8.7%, Evangelical 3.8%, Salvation Army .3%, Presbyterian/Congregational .3%), Roman Catholic 6.3%,  Rastafarian 1.1%, Jehovah's Witness 0.8%, other 4.7%, none 7.5%, unspecified 4.7% (2012 est.)
Samoa
Protestant 54.9% (Congregationalist 29%, Methodist 12.4%, Assembly of God 6.8%, Seventh Day Adventist 4.4%, other Protestant 2.3%), Roman Catholic 18.8%, Mormon 16.9%, Worship Centre 2.8%, other Christian 3.6%, other 2.9% (includes Baha'i, Muslim), none 0.2% (2016 est.)
San Marino
Roman Catholic
Sao Tome and Principe
Catholic 55.7%, Adventist 4.1%, Assembly of God 3.4%, New Apostolic 2.9%, Mana 2.3%, Universal Kingdom of God 2%, Jehovah's Witness 1.2%, other 6.2%, none 21.2%, unspecified 1% (2012 est.)
Saudi Arabia
Muslim (official; citizens are 85-90% Sunni and 10-15% Shia), other (includes Eastern Orthodox, Protestant, Roman Catholic, Jewish, Hindu, Buddhist, and Sikh) (2012 est.)

note: despite having a large expatriate community of various faiths (more than 30% of the population), most forms of public religious expression inconsistent with the government-sanctioned interpretation of Sunni Islam are restricted; non-Muslims are not allowed to have Saudi citizenship and non-Muslim places of worship are not permitted (2013)

Senegal
Muslim 95.9% (most adhere to one of the four main Sufi brotherhoods), Christian 4.1% (mostly Roman Catholic) (2016 est.)
Serbia
Orthodox 84.6%, Catholic 5%, Muslim 3.1%, Protestant 1%, atheist 1.1%, other 0.8% (includes agnostics, other Christians, Eastern, Jewish), undeclared or unknown 4.5% (2011 est.)

note: most ethnic Albanians boycotted the 2011 census

Seychelles
Roman Catholic 76.2%, Protestant 10.5% (Anglican 6.1%, Pentecostal Assembly 1.5%, Seventh Day Adventist 1.2%, other Protestant 1.7%), other Christian 2.4%, Hindu 2.4%, Muslim 1.6%, other non-Christian 1.1%, unspecified 4.8%, none 0.9% (2010 est.)
Sierra Leone
Muslim 78.6%, Christian 20.8%, other 0.3%, unspecified 0.2% (2013 est.)
Singapore
Buddhist 33.2%, Christian 18.8%, Muslim 14%, Taoist 10%, Hindu 5%, other 0.6%, none 18.5% (2015 est.)
Slovakia
Roman Catholic 62%, Protestant 8.2%, Greek Catholic 3.8%, other or unspecified 12.5%, none 13.4% (2011 est.)
Slovenia
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)
Solomon Islands
Protestant 73.4% (Church of Melanesia 31.9%, South Sea Evangelical 17.1%, Seventh Day Adventist 11.7%, United Church 10.1%, Christian Fellowship Church 2.5%), Roman Catholic 19.6%, other Christian 2.9%, other 4%, unspecified 0.1% (2009 est.)
Somalia
Sunni Muslim (Islam) (official, according to the 2012 Transitional Federal Charter)
South Africa
Christian 86%, ancestral, tribal, animist, or other traditional African religions 5.4%, Muslim 1.9%, other 1.5%, nothing in particular 5.2% (2015 est.)
South Sudan
animist, Christian, Muslim
Spain
Roman Catholic 68.9%, atheist 11.3%, agnostic 7.6%, other 2.8%, non-believer 8.2%, unspecified 1.1% (2019 est.)
Sri Lanka
Buddhist (official) 70.2%, Hindu 12.6%, Muslim 9.7%, Roman Catholic 6.1%, other Christian 1.3%, other 0.05% (2012 est.)
Sudan
Sunni Muslim, small Christian minority
Suriname
Protestant 23.6% (includes Evangelical 11.2%, Moravian 11.2%, Reformed .7%, Lutheran .5%), Hindu 22.3%, Roman Catholic 21.6%, Muslim 13.8%, other Christian 3.2%, Winti 1.8%, Jehovah's Witness 1.2%, other 1.7%, none 7.5%, unspecified 3.2% (2012 est.)
Swaziland
Christian 90% (Zionist - a blend of Christianity and indigenous ancestral worship - 40%, Roman Catholic 20%, other 30% - includes Anglican, Methodist, Mormon, Jehovah's Witness), Muslim 2%, other 8% (includes Baha'i, Buddhist, Hindu, indigenous, Jewish) (2015 est.)
Sweden
Church of Sweden (Lutheran) 60.2%, other (includes Roman Catholic, Orthodox, Baptist, Muslim, Jewish, and Buddhist) 8.5%, none or unspecified 31.3% (2017 est.)

note: estimates reflect registered members of faith communities eligible for state funding (not all religions are state-funded and not all people who identify with a particular religion are registered members); an estimated 57.7% of Sweden's population were members of the Church of Sweden in 2018

Switzerland
Roman Catholic 35.9%, Protestant 23.8%, other Christian 5.9%, Muslim 5.4%, Jewish 0.3%, other 1.4%, none 26%, unspecified 1.4% (2017 est.)
Syria
Muslim 87% (official; includes Sunni 74% and Alawi, Ismaili, and Shia 13%), Christian 10% (includes Orthodox, Uniate, and Nestorian), Druze 3%, Jewish (few remaining in Damascus and Aleppo)
note:  the Christian population may be considerably smaller as a result of Christians fleeing the country during the ongoing civil war
Taiwan
Buddhist 35.3%, Taoist 33.2%, Christian 3.9%, folk (includes Confucian) approximately 10%, none or unspecified 18.2% (2005 est.)
Tajikistan
Muslim 98% (Sunni 95%, Shia 3%) other 2% (2014 est.)
Tanzania
Christian 61.4%, Muslim 35.2%, folk religion 1.8%, other 0.2%, unaffiliated 1.4% (2010 est.)

note: Zanzibar is almost entirely Muslim

Thailand
Buddhist 94.6%, Muslim 4.3%, Christian 1%, other (2015 est.)
Togo
Christian 43.7%, folk 35.6%, Muslim 14%, Hindu <.1%, Buddhist <.1%, Jewish <.1%, other .5%, none 6.2% (2010 est.)
Tokelau
Congregational Christian Church 50.4%, Roman Catholic 38.7%, Presbyterian 5.9%, other Christian 4.2%, unspecified 0.8% (2016 est.)
Tonga
Protestant 64.1% (includes Free Wesleyan Church 35%, Free Church of Tonga 11.9%, Church of Tonga 6.8%, Assembly of God 2.3%, Seventh Day Adventist 2.2%, Tokaikolo Christian Church 1.6%, other 4.3%), Mormon 18.6%, Roman Catholic 14.2%, other 2.4%, none 0.5%, unspecified 0.1% (2016 est.)
Trinidad and Tobago
Protestant 32.1% (Pentecostal/Evangelical/Full Gospel 12%, Baptist 6.9%, Anglican 5.7%, Seventh-Day Adventist 4.1%, Presbyterian/Congregational 2.5%, other Protestant 0.9%), Roman Catholic 21.6%, Hindu 18.2%, Muslim 5%, Jehovah's Witness 1.5%, other 8.4%, none 2.2%, unspecified 11.1% (2011 est.)
Tunisia
Muslim (official; Sunni) 99.1%, other (includes Christian, Jewish, Shia Muslim, and Baha'i) 1%
Turkey
Muslim 99.8% (mostly Sunni), other 0.2% (mostly Christians and Jews)
Turkmenistan
Muslim 89%, Eastern Orthodox 9%, unknown 2%
Turks and Caicos Islands
Protestant 72.8% (Baptist 35.8%, Church of God 11.7%, Anglican 10%, Methodist 9.3%, Seventh-Day Adventist 6%), Roman Catholic 11.4%, Jehovah's Witness 1.8%, other 14% (2006 est.)
Tuvalu
Protestant 92.4% (Congregational Christian Church of Tuvalu 85.7%, Brethren 3%, Seventh Day Adventist 2.8%, Assemblies of God .9%), Baha'i 2%, Jehovah's Witness 1.3%, Mormon 1%, other 3.1%, none 0.2% (2012 est.)
Uganda
Protestant 45.1% (Anglican 32.0%, Pentecostal/Born Again/Evangelical 11.1%, Seventh Day Adventist 1.7%, Baptist .3%), Roman Catholic 39.3%, Muslim 13.7%, other 1.6%, none 0.2% (2014 est.)
Ukraine
Orthodox (includes Ukrainian Autocephalous Orthodox (UAOC), Ukrainian Orthodox - Kyiv Patriarchate (UOC-KP), Ukrainian Orthodox - Moscow Patriarchate (UOC-MP)), Ukrainian Greek Catholic, Roman Catholic, Protestant, Muslim, Jewish (2013 est.)

note: Ukraine's population is overwhelmingly Christian; the vast majority - up to two-thirds - identify themselves as Orthodox, but many do not specify a particular branch; the UOC-KP and the UOC-MP each represent less than a quarter of the country's population, the Ukrainian Greek Catholic Church accounts for 8-10%, and the UAOC accounts for 1-2%; Muslim and Jewish adherents each compose less than 1% of the total population

United Arab Emirates
Muslim (official) 76%, Christian 9%, other (primarily Hindu and Buddhist, less than 5% of the population consists of Parsi, Baha'i, Druze, Sikh, Ahmadi, Ismaili, Dawoodi Bohra Muslim, and Jewish) 15% (2005 est.)

note: data represent the total population; about 85% of the population consists of noncitizens

United Kingdom
Christian (includes Anglican, Roman Catholic, Presbyterian, Methodist) 59.5%, Muslim 4.4%, Hindu 1.3%, other 2%, unspecified 7.2%, none 25.7% (2011 est.)
United States
Protestant 46.5%, Roman Catholic 20.8%, Jewish 1.9%, Mormon 1.6%, other Christian 0.9%, Muslim 0.9%, Jehovah's Witness 0.8%, Buddhist 0.7%, Hindu 0.7%, other 1.8%, unaffiliated 22.8%, don't know/refused 0.6% (2014 est.)
Uruguay
Roman Catholic 47.1%, non-Catholic Christians 11.1%, nondenominational 23.2%, Jewish 0.3%, atheist or agnostic 17.2%, other 1.1% (2006 est.)
Uzbekistan
Muslim 88% (mostly Sunni), Eastern Orthodox 9%, other 3%
Vanuatu
Protestant 70% (includes Presbyterian 27.9%, Anglican 15.1%, Seventh Day Adventist 12.5%, Assemblies of God 4.7%, Church of Christ 4.5%, Neil Thomas Ministry 3.1%, and Apostolic 2.2%), Roman Catholic 12.4%, customary beliefs 3.7% (including Jon Frum cargo cult), other 12.6%, none 1.1%, unspecified 0.2% (2009 est.)
Venezuela
nominally Roman Catholic 96%, Protestant 2%, other 2%
Vietnam
Buddhist 7.9%, Catholic 6.6%, Hoa Hao 1.7%, Cao Dai 0.9%, Protestant 0.9%, Muslim 0.1%, none 81.8% (2009 est.)
Virgin Islands
Protestant 59% (Baptist 42%, Episcopalian 17%), Roman Catholic 34%, other 7%
Wallis and Futuna
Roman Catholic 99%, other 1%
West Bank
Muslim 80-85% (predominantly Sunni), Jewish 12-14%, Christian 1-2.5% (mainly Greek Orthodox), other, unaffiliated, unspecified <1% (2012 est.)
Western Sahara
Muslim
World

Christian 31.4%, Muslim 23.2%, Hindu 15%, Buddhist 7.1%, folk religions 5.9%, Jewish 0.2%, other 0.8%, unaffiliated 16.4%

Yemen
Muslim 99.1% (official; virtually all are citizens, an estimated 65% are Sunni and 35% are Shia), other 0.9% (includes Jewish, Baha'i, Hindu, and Christian; many are refugees or temporary foreign residents) (2010 est.)
Zambia
Protestant 75.3%, Roman Catholic 20.2%, other 2.7% (includes Muslim Buddhist, Hindu, and Baha'i), none 1.8% (2010 est.)
Zimbabwe
Protestant 74.8% (includes Apostolic 37.5%, Pentecostal 21.8%, other 15.5%), Roman Catholic 7.3%, other Christian 5.3%, traditional 1.5%, Muslim 0.5%, other 0.1%, none 10.5% (2015 est.)

Source: CIA Factbook