There is no universally agreed definition of the term "denomination".
Denominations overlap. Some congregations, faithful to their own church's ways, might adopt practices from other denominations. Conversely, many denominations have a wide range of shades. Take, for example, the Baptist community: Their parish churches have the autonomy that each could be considered a separate denomination.
| Group |
Denomination |
Membership |
|---|
| | Latin | Latin Church | 1,149,000,000 |
| | | Alexandrian Rite | Ethiopian Catholic Church | 200,000 |
| | | | Coptic Catholic Church | 200,000 |
| | | | Maronite Catholic Church | 3,100,000 |
| | | Antiochene Rite | Syro-Malankara Catholic Church | 400,000 |
| | | | Syriac Catholic Church | 100,000 |
| | | Armenian Rite | Armenian Catholic Church | 400,000 |
| | | Chaldean Rite | Syro-Malabar Catholic Church | 3,800,000 |
| | | | Chaldean Catholic Church | 400,000 |
| | | | Ukrainian Greek Catholic Church | 4,300,000 |
| | | | Melkite Greek Catholic Church | 1,300,000 |
| | | | Romanian Catholic Church | 700,000 |
| | Eastern | | Ruthenian Catholic Church | 500,000 |
| | | | Hungarian Greek Catholic Church | 300,000 |
| Catholic | | | Slovak Greek Catholic Church | 200,000 |
| | | | Italo-Albanian Catholic Church | 100,000 |
| | | Byzantine Rite | Belarusian Greek Catholic Church | 100,000 |
| | | | Georgian Byzantine Catholic Church | 10,000 |
| | | | Albanian Byzantine Catholic Church | 10,000 |
| | | | Bulgarian Greek Catholic Church | 10,000 |
| | | | Croatian Greek Catholic Church | 10,000 |
| | | | Greek Byzantine Catholic Church | 10,000 |
| | | | Macedonian Greek Catholic Church | 10,000 |
| | | | Russian Catholic Church | 10,000 |
| | | Apostolic Catholic Church | 8,000,000 |
| | | Philippine Independent Church  | 6,000,000 |
| | Other | Chinese Patriotic Catholic Association | 5,000,000 |
| | | Brazilian Catholic Apostolic Church | 5,000,000 |
| | | Old Catholic Church | 600,000 |
| | | Society of St. Pius X | 500,000 |
| | | Southern Baptist Convention | 16,300,000 |
| | | National Baptist Convention, USA, Inc. | 8,500,000 |
| | | National Baptist Convention of America, Inc. | 3,100,000 |
| | | Nigerian Baptist Convention | 2,500,000 |
| | | Progressive National Baptist Convention | 2,500,000 |
| | | Baptist General Convention of Texas | 2,300,000 |
| | | Baptist Union of Uganda | 1,500,000 |
| | | American Baptist Churches USA | 1,400,000 |
| | | Brazilian Baptist Convention | 1,300,000 |
| | | Baptist Bible Fellowship International | 1,200,000 |
| | | Baptist Community of the Congo River | 1,000,000 |
| | | National Primitive Baptist Convention of the USA | 1,000,000 |
| | | National Missionary Baptist Convention of America | 1,000,000 |
| | | Samavesam of Telugu Baptist Churches | 800,000 |
| | | Korea Baptist Convention | 800,000 |
| | | Baptist Convention of Kenya | 800,000 |
| | | Myanmar Baptist Convention | 700,000 |
| | | Council of Baptist Churches in Northeast India | 600,000 |
| | | Cooperative Baptist Fellowship | 500,000 |
| | | Nagaland Baptist Church Council | 500,000 |
| | Baptist | Baptist Convention in Tanzania | 500,000 |
| | | Orissa Evangelical Baptist Crusade | 500,000 |
| | | Baptist General Association of Virginia | 500,000 |
| | | National Baptist Convention of Brazil | 400,000 |
| | | Church of Christ in Congo - Baptist Community of Congo | 400,000 |
| | | Convention of Philippine Baptist Churches | 300,000 |
| | | American Baptist Association | 300,000 |
| | | Association of Baptist Churches in Rwanda | 300,000 |
| | | Garo Baptist Convention | 200,000 |
| | | Baptist Community of Western Congo | 200,000 |
| | | Baptist Missionary Association of America | 200,000 |
| | | Conservative Baptist Association of America | 200,000 |
| | | National Association of Free Will Baptists | 200,000 |
| | | Canadian Baptist Ministries | 200,000 |
| | | National Baptist Convention of Mexico | 200,000 |
| | | Manipur Baptist Convention | 200,000 |
| | | Convention of Baptist Churches of the Northern Circars | 200,000 |
| | | Baptist Community in Central Africa | 200,000 |
| | | Baptist Convention of Malawi | 200,000 |
| | | Evangelical Church in Germany | 24,500,000 |
| | | Church of Sweden | 6,700,000 |
| | | Evangelical Lutheran Church in Tanzania | 5,600,000 |
| | | Ethiopian Evangelical Church Mekane Yesus | 5,300,000 |
| | | United Evangelical Lutheran Church in India | 4,500,000 |
| | | Evangelical Lutheran Church in America | 4,500,000 |
| | | Church of Denmark | 4,500,000 |
| | | Evangelical Lutheran Church of Finland | 4,400,000 |
| | | Batak Christian Protestant Church | 4,200,000 |
| | | Church of Norway | 4,000,000 |
| | | Christian Protestant Church in Indonesia | 3,600,000 |
| | | Malagasy Lutheran Church | 3,000,000 |
| | | Lutheran Church - Missouri Synod | 2,500,000 |
| | | Lutheran Church of Christ in Nigeria | 1,900,000 |
| | | Evangelical Lutheran Church of Papua New Guinea | 1,200,000 |
| | | Evangelical Church of the Lutheran Confession in Brazil | 700,000 |
| | Lutheran | Evangelical Lutheran Church in Namibia | 700,000 |
| | | Evangelical Lutheran Church in Southern Africa | 600,000 |
| | | Evangelical Lutheran Church in the Republic of Namibia | 400,000 |
| | | Wisconsin Evangelical Lutheran Synod | 400,000 |
| | | Evangelical Church of the Augsburg Confession in Slovakia | 400,000 |
| | | Indonesian Protestant Church | 400,000 |
| | | Evangelical Church of the Augsburg Confession in Austria | 300,000 |
| | | Evangelical Lutheran Church of Cameroon | 200,000 |
| | | Church of Iceland | 200,000 |
| | | Evangelical Lutheran Church of Brazil | 200,000 |
| | | Simalungun Protestant Christian Church | 200,000 |
| | | Evangelical Lutheran Church in Zimbabwe | 200,000 |
| | | Evangelical Lutheran Church of Latvia | 200,000 |
| | | Evangelical Lutheran Church in Hungary | 200,000 |
| | | Lutheran Council of Great Britain | 200,000 |
| | | Estonian Evangelical Lutheran Church | 200,000 |
| | | United Methodist Church | 12,000,000 |
| | | African Methodist Episcopal Church | 2,500,000 |
| | | Methodist Church Nigeria | 2,000,000 |
| | | Church of the Nazarene | 2,000,000 |
| | | Methodist Church of Southern Africa | 1,700,000 |
| | | Korean Methodist Church | 1,500,000 |
| | | African Methodist Episcopal Zion Church | 1,500,000 |
| | | Salvation Army | 1,400,000 |
| | Methodist | United Methodist Church of Ivory Coast | 1,000,000 |
| | | Free Methodist Church | 900,000 |
| | | Christian Methodist Episcopal Church | 900,000 |
| | | Methodist Church Ghana | 800,000 |
| | | Methodist Church in India | 600,000 |
| | | Methodist Church in Kenya | 500,000 |
| | | Wesleyan Church | 400,000 |
| | | Evangelical Free Church of America | 400,000 |
| | | Methodist Church of Great Britain | 300,000 |
| | | Methodist Church in Brazil | 200,000 |
| | | | Presbyterian Church of East Africa | 4,000,000 |
| | | | Presbyterian Church of Africa | 3,400,000 |
| | | | Presbyterian Church (USA) | 3,000,000 |
| Protestant | | | United Church of Canada | 2,800,000 |
| | | | Church of Christ in Congo - Presbyterian Community of Congo | 2,500,000 |
| | | | Presbyterian Church of Korea | 2,400,000 |
| | | | Presbyterian Church in Cameroon | 1,800,000 |
| | | | Church of Central Africa, Presbyterian | 1,300,000 |
| | | | Church of Scotland | 1,100,000 |
| | | | Presbyterian Church of Sudan | 1,000,000 |
| | | Presbyterian | Presbyterian Church of Brazil | 700,000 |
| | | | Evangelical Presbyterian Church, Ghana | 600,000 |
| | | | United Church of Christ in the Philippines | 500,000 |
| | | | Presbyterian Church of Nigeria | 500,000 |
| | | | Uniting Presbyterian Church in Southern Africa | 500,000 |
| | | | Presbyterian Church of Pakistan | 400,000 |
| | | | Presbyterian Church in Ireland | 300,000 |
| | | | Uniting Church in Australia | 300,000 |
| | | | Presbyterian Church in the Republic of Korea | 300,000 |
| | | | Presbyterian Church in Rwanda | 300,000 |
| | | | Presbyterian Church in Taiwan | 300,000 |
| | | | Church of Jesus Christ in Madagascar | 3,500,000 |
| | | | United Church of Zambia | 3,000,000 |
| | | | Protestant Church in Netherlands | 2,500,000 |
| | | | Swiss Reformed Church | 2,400,000 |
| | | | Evangelical Church of Cameroon | 2,000,000 |
| | | | Protestant Evangelical Church in Timor | 2,000,000 |
| | | | Nederduits Gereformeerde Kerk | 1,100,000 |
| | | | Christian Evangelical Church in Minahasa | 700,000 |
| | Reformed | | United Church in Papua New Guinea | 600,000 |
| | | | Protestant Church in Western Indonesia | 600,000 |
| | | | Evangelical Christian Church in Tanah Papua | 600,000 |
| | | | Protestant Church in the Moluccas | 600,000 |
| | | | Reformed Church in Hungary | 600,000 |
| | | | Reformed Church in Romania | 600,000 |
| | | | Uniting Reformed Church in Southern Africa | 500,000 |
| | | | Toraja Church | 400,000 |
| | | | Reformed Church of France | 400,000 |
| | | Continental | Lesotho Evangelical Church | 300,000 |
| | | | Evangelical Christian Church in Halmahera | 300,000 |
| | | | Christian Church of Sumba | 300,000 |
| | | | Karo Batak Protestant Church | 300,000 |
| | | | Reformed Church in America | 300,000 |
| | | | Christian Reformed Church in North America | 300,000 |
| | | | Reformed Church in Zambia | 300,000 |
| | | | Kalimantan Evangelical Church | 200,000 |
| | | | Javanese Christian Churches | 200,000 |
| | | | Indonesia Christian Church | 200,000 |
| | | | Church of Christ in the Sudan Among the Tiv | 200,000 |
| | | | Church of Lippe | 200,000 |
| | | | Evangelical Church of Congo | 200,000 |
| | | | Evangelical Church of Gabon | 200,000 |
| | | | Christian Evangelical Church of Sangihe Talaud | 200,000 |
| | | | Central Sulawesi Christian Church | 200,000 |
| | | | Evangelical Reformed Church in Bavaria & Northwestern Germany | 200,000 |
| | | | Christian Reformed Church of Nigeria | 160,000 |
| | | | United Church of Christ | 1,200,000 |
| | | Congregation
-alist | Evangelical Congregational Church in Angola | 900,000 |
| | | | United Congregational Church of Southern Africa | 500,000 |
| | | Schwarzenau Brethren | 1,500,000 |
| | | Mennonites | 1,500,000 |
| | Anabaptism and Free | Plymouth Brethren | 1,000,000 |
| | | Moravian Church | 700,000 |
| | | Amish | 250,000 |
| | | Hutterites | 200,000 |
| | Quaker | Religious Society of Friends (Quakers) | 400,000 |
| | Waldensians | Waldensian Church | 50,000 |
| | | Assemblies of God | 64,000,000 |
| | | International Circle of Faith | 11,000,000 |
| | | Pentecostal Mission | 10,000,000 |
| | | International Church of the Foursquare Gospel | 8,000,000 |
| | | Apostolic Church | 6,000,000 |
| | Pentecostal | Church of God in Christ | 6,500,000 |
| | | United Pentecostal Church International | 4,000,000 |
| | | Christian Congregation of Brazil | 2,500,000 |
| | | Universal Church of the Kingdom of God | 2,000,000 |
| | | Church of God (Cleveland, Tennessee | 1,000,000 |
| | | Church of God of Prophecy | 1,000,000 |
| | | God is Love Pentecostal Church | 800,000 |
| | | Calvary Chapel | 25,000,000 |
| | | Born Again Movement | 20,000,000 |
| | Other evangelical | Association of Vineyard Churches | 15,000,000 |
| | | Christian and Missionary Alliance | 4,000,000 |
| | | True Jesus Church | 2,500,000 |
| | | Church of God (Anderson, Indiana) | 1,200,000 |
| | | Zion Christian Church | 15,000,000 |
| | | Kimbanguist Church | 5,500,000 |
| | | Eternal Sacred Order of Cherubim & Seraphim | 5,000,000 |
| | African | Church of the Lord (Aladura) | 3,600,000 |
| | | Council of African Instituted Churches | 3,000,000 |
| | | Church of Christ Light of the Holy Spirit | 1,400,000 |
| | | African Church of the Holy Spirit | 700,000 |
| | | African Israel Church Nineveh | 500,000 |
| | Seventh-day Adventist Church | Seventh-day Adventist Church | 17,000,000 |
| | Restorationist | Churches of Christ | 5,000,000 |
| | | Christian Church (Disciples of Christ) | 700,000 |
| | Oneness Pentecostalism | Pentecostal Assemblies of the World | 1,500,000 |
| | Russian Orthodox Church | 125,000,000 |
| | Romanian Orthodox Church | 23,000,000 |
| | Serbian Orthodox Church | 11,500,000 |
| | Church of Greece | 11,000,000 |
| | Bulgarian Orthodox Church | 10,000,000 |
| | Ukrainian Orthodox Church (Moscow Patriarchate) | 7,200,000 |
| | Ukrainian Orthodox Church (Kyiv Patriarchate) | 5,500,000 |
| | Old Believers | 5,500,000 |
| | Georgian Orthodox Church | 5,000,000 |
| | Ukrainian Autocephalous Orthodox Church | 3,800,000 |
| | Greek Orthodox Church of Constantinople | 3,500,000 |
| | Moldovan Orthodox Church | 3,200,000 |
| | Greek Orthodox Patriarchate of Antioch & All the East | 2,500,000 |
| | Belarusian Autocephalous Orthodox Church | 2,400,000 |
| | Macedonian Orthodox Church | 2,000,000 |
| | Greek Orthodox Patriarchate of Alexandria & All Africa | 1,500,000 |
| | Russian Orthodox Church Outside Russia | 1,250,000 |
| | Orthodox Church in America | 1,200,000 |
| | Polish Orthodox Church | 1,000,000 |
| Eastern Orthodox | Greek Old Calendarists | 860,000 |
| | Russian True Orthodox Church | 850,000 |
| | Albanian Orthodox Church | 800,000 |
| | Orthodox Church of Greece (Holy Synod in Resistance) | 750,000 |
| | Cypriot Orthodox Church | 700,000 |
| | Metropolitan Church of Bessarabia | 620,000 |
| | Old Calendar Romanian Orthodox Church | 500,000 |
| | Old Calendar Bulgarian Orthodox Church | 450,000 |
| | Orthodox Ohrid Archbishopric | 340,000 |
| | Estonian Orthodox Church | 300,000 |
| | Patriarchal Exarchate in Western Europe | 150,000 |
| | Greek Orthodox Patriarchate of Jerusalem | 140,000 |
| | Orthodox Church in Italy | 120,000 |
| | Finnish Orthodox Church | 80,000 |
| | Czech and Slovak Orthodox Church | 70,000 |
| | Montenegrin Orthodox Church | 50,000 |
| | Chinese Orthodox Church | 30,000 |
| | Japanese Orthodox Church | 20,000 |
| | Latvian Orthodox Church | 20,000 |
| | Church of England | 25,000,000 |
| | Church of Nigeria | 18,000,000 |
| | Church of Uganda | 8,100,000 |
| | Anglican Church of Kenya | 5,000,000 |
| | Episcopal Church of Sudan | 4,500,000 |
| | Church of South India | 4,000,000 |
| | Anglican Church of Australia | 3,900,000 |
| | Episcopal Church in the United States | 2,400,000 |
| | Anglican Church of Southern Africa | 2,300,000 |
| Anglican | Anglican Church of Tanzania | 2,000,000 |
| | Anglican Church of Canada | 2,000,000 |
| | Church of North India | 1,500,000 |
| | Church of the Province of Rwanda | 1,000,000 |
| | Church of the Province of Central Africa | 900,000 |
| | Anglican Church of Burundi | 800,000 |
| | Church of the Province of the West Indies | 800,000 |
| | Church of the Province of the Indian Ocean | 500,000 |
| | Church of Christ in Congo - Anglican Community of Congo | 500,000 |
| | Church of Pakistan | 500,000 |
| | Traditional Anglican Communion | 500,000 |
| | Church of Ireland | 400,000 |
| | Church of the Province of West Africa | 300,000 |
| | Church of the Province of Melanesia | 200,000 |
| | Anglican Church in North America | 100,000 |
| | Ethiopian Orthodox Tewahedo Church | 48,000,000 |
| | Coptic Orthodox Church of Alexandria | 15,500,000 |
| | Armenian Apostolic Orthodox Church | 9,000,000 |
| | Eritrean Orthodox Tewahedo Church | 2,500,000 |
| | Indian (Malankara) Orthodox Church | 2,000,000 |
| | Armenian Orthodox Church of Cilicia | 1,500,000 |
| Oriental Orthodox | Malankara Mar Thoma Syrian Church | 1,100,000 |
| | Syriac Orthodox Church | 1,050,000 |
| | Jacobite Syrian Orthodox Church | 1,200,000 |
| | Armenian Patriarchate of Constantinople | 420,000 |
| | Armenian Patriarchate of Jerusalem | 340,000 |
| | Malabar Independent Syrian Church | 60,000 |
| | French Coptic Orthodox Church | 10,000 |
| | British Orthodox Church | 10,000 |
| | Latter Day Saint movement | Church of Jesus Christ of Latter-day Saints | 14,800,000 |
| | | Community of Christ | 200,000 |
| | New Apostolic Church | 11,000,000 |
| Restorationist | Jehovah's Witnesses | 7,500,000 |
| | Iglesia ni Cristo | 1,800,000 |
| | Church of Christ, Scientist | 400,000 |
| | Friends of Man | 70,000 |
| | Christadelphians | 60,000 |
| Unitarian Universalist | Unitarian Universalist Association | 200,000 |
| Nestorian | Assyrian Church of the East | 500,000 |
| | Ancient Church of the East | 100,000 |