Cambodia Theravada Buddhist 95%, others 5%
Cameroon indigenous beliefs 40%, Christian 40%, Islam 20%
Canada Roman Catholic 46%, Protestant 36%, other 18% (based on 1991 census)
Cape Verde Roman Catholic (infused with indigenous beliefs), Protestant (mostly Church of the Nazarene)
Central African Republic indigenous beliefs 35%, Protestant and Roman Catholic (both with animist influence) 25% each, Islam 15%
Chad Islam 51%, Christian 35%, animist 7%, other 7%
Chile Roman Catholic 89%, Protestant 11%, small Jewish and Muslim populations
China Christian 3%-4%; Daoist (Taoist), Buddhist, Muslim 1%-2%. Officially atheist (2002 est.)
Colombia Roman Catholic 90%
Comoros Sunni Muslim 98%, Roman Catholic 2%
Congo, Republic of Christian 50%, animist 48%, Islam 2%
Congo, Democratic Republic of the Roman Catholic 50%, Protestant 20%, Kimbanguist 10%, Islam 10%; other syncretic and indigenous, 10%
Costa Rica Roman Catholic 76.3%, Evangelical 13.7%, Jehovah's Witnesses 1.3%, other Protestant 0.7%, other 4.8%, none 3.2%
Côte d'Ivoire indigenous 25%-40%, Islam 35%-40%, Christian 20%-30% (2001)
Croatia Roman Catholic 87.8%, Orthodox 4.4%, Muslim 1.3%, Protestant 0.3%, others and unknown 6.2% (2001)
Cuba nominally 85% Roman Catholic before Castro assumed power
Cyprus Greek Orthodox 78%, Islam 18%, Maronite, Armenian Apostolic, and other 4%
Czech Republic atheist 39.8%, Roman Catholic 39.2%, Protestant 4.6%, Orthodox 3%, other 13.4%
 

Denmark Evangelical Lutheran 95%, other Protestant and Roman Catholic 3%, Muslim 2%
Djibouti Islam 94%, Christian 6%
Dominica Roman Catholic 77%, Protestant 15% (Methodist 5%, Pentecostal 3%, Seventh-Day Adventist 3%, Baptist 2%, other 2%), none 2%, other 6%
Dominican Republic Roman Catholic 95%
 

East Timor Roman Catholic 90%, Islam 4%, Protestant 3%, Hindu 0.5%, Buddhist, animist (1992 est.)
Ecuador Roman Catholic 95%
Egypt Islam (mostly Sunni) 94%, Coptic Christian and other 6%
El Salvador Catholics 83%; growing population of evangelical Protestants (1992)
Equatorial Guinea nominally Christian and predominantly Roman Catholic, pagan practices
Eritrea Islam, Eritrean Orthodox Christianity, Roman Catholic, Protestant
Estonia Evangelical Lutheran, Russian Orthodox, Estonian Orthodox, Baptist, Methodist, Seventh-Day Adventist, Roman Catholic, Pentecostal, Word of Life, Jewish
Ethiopia Islam 45%–50%, Ethiopian Orthodox 35%–40%, animist 12%, other 3%–8%
 

Fiji Christian 52% (Methodist 37%, Roman Catholic 9%), Hindu 38%, Islam 8%, other 2%
Finland Evangelical Lutheran 89%, Greek Orthodox 1%, none 9%, other 1%
France Roman Catholic 83%-88%, Protestant 2%, Islam 5%-10%, Jewish 1%
 

Gabon Christian 55%-75%, Animist, Islam less than 1%
Gambia, The Islam 90%, Christian 9%, indigenous 1%
Georgia Georgian Orthodox 65%, Islam 11%, Russian Orthodox 10%, Armenian Orthodox 8%, unknown 6%
Germany Protestant 34%, Roman Catholic 34%, Islam 3.7%, Unaffiliated or other 28.3%
Ghana Christian 63%, indigenous beliefs 21%, Islam 16%
Greece Greek Orthodox 98%, Islam 1.3%, other 0.7%
Grenada Roman Catholic 53%, Anglican 13.8%, other Protestant 33.2%
Guatemala Roman Catholic, Protestant, indigenous Mayan beliefs
Guinea Islam 85%, Christian 8%, indigenous 7%
Guinea-Bissau indigenous beliefs 50%, Islam 45%, Christian 5%
Guyana Christian 50%, Hindu 35%, Islam 10%, other 5%
 

Haiti Roman Catholic 80%, Protestant 16% (Baptist 10%, Pentecostal 4%, Adventist 1%, other 1%), other 3%, none 1%. Note: roughly half the population practices Vaudou.
Honduras Roman Catholic 97%, growing population of evangelical Protestants
Hungary Roman Catholic 67.5%, Calvinist 20%, Lutheran 5%, atheist and others 7.5%
 

Iceland Church of Iceland (Evangelical Lutheran) 87.1%, other Protestant 4.1%, Roman Catholic 1.7%, other 7.1% (2002)
India Hindu 81.3%, Islam 12%, Christian 2.3%, Sikh 1.9%, other (including Buddhists, Jains, and Parsis) 2.5%
Indonesia Islam 88%, Protestant 5%, Roman Catholic 3%, Hindu 2%, Buddhist 1%, other 1%
Iran Islam 98% (Shi'a 89%, Sunni 9%); Zoroastrian, Jewish, Christian, and Baha'i 2%
Iraq Islam 97% (Shiite 60%–65%, Sunni 32%–37%), Christian or other 3%
Ireland Roman Catholic 91.6%, Anglican 2.5%, other 5.9%
Israel Judaism 80.1%, Islam 14.6% (mostly Sunni), Christian 2.1%, others 3.2% (1996 est.)
Italy Roman Catholic (predominant), Protestant, Jewish, Islamic
 

Jamaica Protestant 61.3% (Church of God 21.2%, Baptist 8.8%, Anglican 5.5%, Seventh-Day Adventist 9%, Pentecostal 7.6%, Methodist 2.7%, United Church 2.7%, Brethren 1.1%, Jehovah's Witness 1.6%, Moravian 1.1%), Roman Catholic 4%, other including some spiritual cults 34.7%
Japan Shintoist and Buddhist 84%, other 16% (including Christian 0.7%)
Jordan Islam (Sunni) 92%, Christian 6% (mostly Greek Orthodox), other 2%
 

Kazakhstan Islam 47%, Russian Orthodox 44%, Protestant 2%, other 7%
Kenya Protestant 45%, Roman Catholic 33%, indigenous beliefs 10%, Islam 10%, others 2% (note: estimates vary widely)
Kiribati Roman Catholic 52%, Protestant (Congregational) 40%, some Seventh-Day Adventist, Muslim, Baha'i, Latter-day Saints, and Church of God (1999)
Korea, North Buddhism and Confucianism; religious activities almost nonexistent
Korea, South no affiliation 46%, Christian 26%, Buddhist 26%, Confucianist 1%, other 1%
Kuwait Islam 85% (Sunni 70%, Shiite 30%); Christian, Hindu, Parsi, and other 15%
Kyrgyzstan Islam, 75%; Russian Orthodox, 20%; other, 5%
 

Laos Buddhist 60%, animist and other 40% (including Christian 1.5%)
Latvia Lutheran, Roman Catholic, Russian Orthodox
Lebanon Islam 70% (including Shi'a, Sunni, Druze, Isma'ilite, Alawite, Nusayri), Christian 30% (including Orthodox Christian, Catholic, Protestant), Jewish negl.
Lesotho Christian 80%, indigenous beliefs 20%
Liberia traditional 40%, Christian 40%, Islam 20%
Libya Islam (Sunni) 97%
Liechtenstein Roman Catholic, 76.2%, Protestant, 7%; unknown, 10.6%; other, 6.2% (2002)
Lithuania Roman Catholic (primarily); others include Lutheran, Russian Orthodox, Protestant, evangelical Christian Baptist, Islam, Judaism
Luxembourg Roman Catholic 87%; Protestant, Jewish, Islamic 13% (2000)
 

Macedonia Macedonian Orthodox 70%, Islam 29%, other 1% (1994)
Madagascar indigenous beliefs 52%, Christian 41%, Islam 7%
Malawi Protestant 55%, Roman Catholic 20%, Islam 20%, indigenous beliefs 3%, other 2%
Malaysia Muslim, Buddhist, Daoist, Hindu, Christian, Sikh; Shamanism (East Malaysia)
Maldives Islam (Sunni)
Mali Islam 90%, indigenous beliefs 9%, Christian 1%
Malta Roman Catholic 98%
Marshall Islands Christian (mostly Protestant)
Mauritania Islam 100%
Mauritius Hindu 52%, Christian 28.3% (Roman Catholic 26%, Protestant 2.3%), Islam 16.6%, other 3.1%
Mexico nominally Roman Catholic 89%, Protestant 6%, other 5%
Micronesia Roman Catholic 50%, Protestant 47%
Moldova Eastern Orthodox 98%, Jewish 1.5%, Baptist and other 0.5% (2000)
Monaco Roman Catholic 90%
Mongolia Tibetan Buddhist Lamaism 96%, Islam (primarily in the southwest), Shamanism, and Christian 4% (1998)
Morocco Islam 98.7%, Christian 1.1%, Jewish 0.2%
Mozambique indigenous beliefs 50%, Christian 30%, Islam 20%
Myanmar Buddhist 89%, Christian 4% (Baptist 3%, Roman Catholic 1%), Islam 4%, Animist 1%, other 2%
 

Namibia Christian 80%–90% (Lutheran at least 50%), indigenous beliefs 10%–20%
Nauru Christian (two-thirds Protestant, one-third Roman Catholic)
Nepal Hindu 86.2%, Buddhist 7.8%, Islam 3.8%, other 2.2% (1995)
The Netherlands Roman Catholic 31%, Protestant 21%, Islam 4.4%, other 3.6%, unaffiliated 40% (1998)
New Zealand Anglican 24%, Presbyterian 18%, Roman Catholic 15%, Methodist 5%, Baptist 2%, other Protestant 3%, unspecified or none 33% (1986)
Nicaragua Roman Catholic 85%, Protestant
Niger Islam 80%, indigenous beliefs and Christian 20%
Nigeria Islam 50%, Christian 40%, indigenous beliefs 10%
Norway Evangelical Lutheran 86% (state church), other Protestant and Roman Catholic 3%, other 1%, none and unknown 10%
 

Oman Islam: Ibadhi 75%, Sunni, Shi'a; Hindu
 

Pakistan Islam 97% (Sunni 77%, Shiite 20%); Christian, Hindu, and other 3%
Palau Christian (Roman Catholics 49%, Seventh-Day Adventists, Jehovah's Witnesses, the Assembly of God, the Liebenzell Mission, and Latter-Day Saints), Modekngei (one-third observes this indigenous religion)
Palestinian State (proposed) West Bank: Islam 75% (predominantly Sunni), Jewish 17%, Christian and other 8%; Gaza Strip: Islam 98.7% (predominantly Sunni), Christian 0.7%, Jewish 0.6%
Panama Roman Catholic 85%, Protestant 15%
Papua New Guinea Roman Catholic 22%, Lutheran 16%, Presbyterian/Methodist/London Missionary Society 8%, Anglican 5%, Evangelical Alliance 4%, Seventh-Day Adventist 1%, other Protestant 10%, indigenous beliefs 34%
Paraguay Roman Catholic 90%, Mennonite, other Protestant
Peru Roman Catholic 90%
The Philippines Roman Catholic 83%, Protestant 9%, Islam 5%, Buddhist and other 3%
Poland Roman Catholic 95% (about 75% practicing), Eastern Orthodox, Protestant, and other 5%
Portugal Roman Catholic 94%, Protestant (1995)
 

Qatar Islam 95%
 

Romania Romanian Orthodox 87%, Protestant 6.8%, Roman Catholic 5.6%, other (mostly Islam) 0.4%, unaffiliated 0.2% (2002)
Russia Russian Orthodox, Islam, others
Rwanda Roman Catholic 56.5%, Protestant 26%, Adventist 11.1%, Islam 4.6%, indigenous beliefs 0.1%, none 1.7% (2001)
 

St. Kitts and Nevis Anglican, other Protestant, Roman Catholic
St. Lucia Roman Catholic 90%, Anglican 3%, other Protestant 7%
St. Vincent and the Grenadines Anglican 47%, Methodist 28%, Roman Catholic 13%, Hindu, Seventh-Day Adventist, other Protestant
Samoa Christian 99.7% (about half associated with the London Missionary Society; includes Congregational, Roman Catholic, Methodist, Latter-Day Saints, Seventh-Day Adventist)
San Marino Roman Catholic
São Tomé and Príncipe Christian 80% (Roman Catholic, Evangelical Protestant, Seventh-Day Adventist)
Saudi Arabia Islam 100%
Senegal Islam 94%, Christian 5% (mostly Roman Catholic), indigenous 1%
Serbia and Montenegro Orthodox 65%, Islam 19%, Roman Catholic 4%, Protestant 1%, other 11%
Seychelles Roman Catholic 86.6%, Anglican 6.8%, other Christian 2.5%, other 4.1%
Sierra Leone Islam 60%, indigenous 30%, Christian 10%
Singapore Buddhist (Chinese), Islam (Malays), Christian, Hindu, Sikh, Taoist, Confucianist
Slovakia Roman Catholic 60.3%, atheist 9.7%, Protestant 8.4%, Orthodox 4.1%, other 17.5%
Slovenia Roman Catholic 70.8% (including 2% Uniate), Lutheran 1%, Islam 1%, atheist 4.3%, other 22.9%
Solomon Islands Anglican 45%, Roman Catholic 18%, United (Methodist/Presbyterian) 12%, Baptist 9%, Seventh-Day Adventist 7%, other Protestant 5%, indigenous beliefs 4%
Somalia Islam (Sunni)
South Africa Christian 68% (includes most whites and Coloreds, about 60% of blacks, and about 40% of Indians), indigenous beliefs and animist 28.5%, Islam 2%, Hindu 1.5% (60% of Indians)
Spain Roman Catholic 94%, other 6%
Sri Lanka Buddhist 70%, Hindu 15%, Christian 8%, Islam 7% (1999)
Sudan Islam (Sunni) 70% (in north), indigenous 25%, Christian 5% (mostly in south and Khartoum)
Suriname Hindu 27.4%, Protestant 25.2% (predominantly Moravian), Roman Catholic 22.8%, Islam 19.6%, indigenous 5%
Swaziland Zionist (a blend of Christianity and indigenous ancestral worship) 40%; Roman Catholic 20%; Muslim 10%; Anglican, Bahai, Methodist, Mormon, Jewish, and other 30%
Sweden Lutheran 87%, Roman Catholic, Orthodox, Baptist, Muslim, Jewish, Buddhist
Switzerland Roman Catholic 46.1%, Protestant 40%, other 5%, no religion 8.9% (1990)
Syria Islam (Sunni) 74%; Alawite, Druze, and other Islamic sects 16%; Christian (various sects) 10%; Jewish (tiny communities in Damascus, Al Qamishli, and Aleppo)
 

Taiwan mixture of Buddhist, Confucian, and Taoist 93%, Christian 4.5%, other 2.5%
Tajikistan Islam: Sunni 85%, Shiite 5%; other 10% (2003 est.)
Tanzania mainland: Christian 30%, Islam 35%, indigenous 35%; Zanzibar: more than 99% Islam
Thailand Buddhist 95%, Islam 3.8%, Christian 0.5%, Hindu 0.1%, other 0.6% (1991)
Togo Indigenous beliefs 51%, Christian 29%, Islam 20%
Tonga Christian (Free Wesleyan Church claims over 30,000 adherents)
Trinidad and Tobago Roman Catholic 29.4%, Hindu 23.8%, Anglican 10.9%, Islam 5.8%, Presbyterian 3.4%, other 26.7%
Tunisia Islam (Sunni) 98%, Christian 1%, Jewish and other 1%
Turkey Islam (mostly Sunni) 99.8%, other 0.2% (mostly Christians and Jews)
Turkmenistan Islam 89%, Eastern Orthodox 9%, unknown 2%
Tuvalu Church of Tuvalu (Congregationalist) 97%, Seventh-Day Adventist 1.4%, Baha'i 1%, other 0.6%
 

Uganda Roman Catholic 33%, Protestant 33%, Islam 16%, indigenous beliefs 18%
Ukraine Ukrainian Orthodox (Moscow Patriarchate, Kiev Patriarchate), Ukrainian Autocephalous Orthodox, Ukrainian Catholic (Uniate), Protestant, Jewish
United Arab Emirates Islam 96% (Sunni 80%, Shiite 16%) , Christian, Hindu, and other 4%
United Kingdom Anglican and Roman Catholic 40 million, Muslim 1.5 million, Presbyterian 800,000, Methodist 760,000, Sikh 500,000, Hindu 500,000, Jewish 350,000
United States Protestant 56%; Roman Catholic 28%; Jewish 2%; other 4%; none 10% (1989)
Uruguay Roman Catholic 66%, Protestant 2%, Jewish 1%, nonprofessing or other 31%
Uzbekistan Islam (mostly Sunnis) 88%, Eastern Orthodox 9%, other 3%
 

Vanuatu Presbyterian 36.7%, Anglican 15%, Roman Catholic 15%, indigenous beliefs 7.6%, Seventh-Day Adventist 6.2%, Church of Christ 3.8%, other 15.7% (including Jon Frum Cargo cult)
Vatican City (Holy See) Roman Catholic.
Venezuela Roman Catholic 96%, Protestant 2%, other 2%
Vietnam Buddhist, Hoa Hao, Cao Dai, Christian (predominantly Roman Catholic, some Protestant), indigenous beliefs, Muslim
 

Western Sahara (proposed state) Islam
Yemen Islam (including Sunni and Shiite), small numbers of Jewish, Christian, and Hindu