Debate between Catholics and Oriental Christians in the 13th century, Acre 1290. (Photo credit: Wikipedia)
Catholicism – 1.2 billion
- Roman Catholic Church – 1,147 million[1]
- Roman Catholic Church (Latin Rite) – 1,125.5 million
- Eastern Catholic Churches (Eastern Rite) – 21.5 million
- Alexandrian
- Ethiopian Catholic Church – 0.21 million
- Coptic Catholic Church – 0.17 million
- Antiochian (Antiochene or West Syrian)
- Maronite Catholic Church – 3.1 million
- Syro-Malankara Catholic Church – 0.5 million
- Syriac Catholic Church – 0.17 million
- Armenian
- Armenian Catholic Church – 0.54 million
- Chaldean (Eastern Syrian)
- Syro-Malabar Catholic Church – 4.0 million
- Chaldean Catholic Church – 0.65 million
- Byzantine (Constantinopolitan)
- Ukrainian Greek Catholic Church – 4.3 million
- Melkite Greek Catholic Church – 1.6 million
- Romanian Church United with Rome, Greek-Catholic – 0.8 million
- Ruthenian Catholic Church – 0.65 million
- Slovak Greek Catholic Church – 0.37 million
- Hungarian Greek Catholic Church – 0.27 million
- Italo-Greek Catholic Church – 0.07 million
- Croatian Greek Catholic Church – 0.06 million
- Belarusian Greek Catholic Church – 0.01 million
- Bulgarian Greek Catholic Church – 0.01 million
- Georgian Byzantine Catholic Church – 0.01 million[2]
- Macedonian Greek Catholic Church – 0.01 million
- Albanian Greek-Catholic Church – 0.01 million
- Greek Byzantine Catholic Church – 0.01 million
Stripped image of John Wesley (Photo credit: Wikipedia)
- Russian Catholic Church – 0.01 million
- Alexandrian
- Breakaway Catholic Churches – 28 million
- Apostolic Catholic Church – 5 million
- Chinese Patriotic Catholic Association – 4 million[3]
- Philippine Independent Church – 3 million
- Brazilian Catholic Apostolic Church – 1 million
- Old Catholic Church – 0.6 million
- Mariavite Church – 0.03 million
Protestantism – 670 million
- Historical Protestantism – 350 million
- Baptist churches – 105 million[4]
- Southern Baptist Convention – 16.3 million[5]
- National Baptist Convention, USA, Inc. – 7.5 million[6]
- National Baptist Convention of America, Inc. – 5 million[7]
- Nigerian Baptist Convention – 3 million[8]
- Progressive National Baptist Convention – 2.5 million[9]
- American Baptist Churches USA – 1.4 million
- Brazilian Baptist Convention – 1.4 million
- Baptist Bible Fellowship International – 1.2 million[10]
- Myanmar Baptist Convention – 1.1 million[11]
- Baptist Community of the Congo River – 1 million[11]
- National Baptist Convention, Brazil – 1 million
- National Primitive Baptist Convention of the U.S.A. – 1 million[10]
- National Missionary Baptist Convention of America – 1 million
- Samavesam of Telugu Baptist Churches – 0.8 million[12]
- Baptist Convention of Kenya – 0.7 million[11]
- Union of Evangelical Christians-Baptists of Russia – 0.6 million
- Methodism – 75 million
- United Methodist Church – 12 million
- African Methodist Episcopal Church – 3 million
- Methodist Church Nigeria – 2 million[13]
- African Methodist Episcopal Zion Church – 1.5 million
- Church of the Nazarene – 1.8 million
- Methodist Church of Southern Africa – 1.7 million[14]
- Korean Methodist Church – 1.5 million[15]
- United Methodist Church of Ivory Coast[16]
- Christian Methodist Episcopal Church – 0.9 million
emblem of the Papacy: Triple tiara and keys Français : emblème pontifical Italiano: emblema del Papato Português: Emblema papal. (Photo credit: Wikipedia)
- Methodist Church Ghana – 0.8 million[17]
- Free Methodist Church – 0.7 million
- Methodist Church in India – 0.6 million[18]
- Lutheranism – 87 million[19]
- Evangelical Church in Germany – 26.9 million[20]
- Church of Sweden – 6.9 million
- Evangelical Lutheran Church in America – 4.8 million
- Ethiopian Evangelical Church Mekane Yesus – 4.7 million
- Evangelical Lutheran Church in Tanzania – 4.6 million[21]
- Danish National Church – 4.5 million
- Evangelical Lutheran Church of Finland – 4.3 million[22]
- Batak Christian Protestant Church – 4 million[23]
- Church of Norway – 3.9 million
- Malagasy Lutheran Church – 3 million
- Lutheran Church-Missouri Synod – 2 million
- Lutheran Church of Christ in Nigeria – 1.7 million[24]
- United Evangelical Lutheran Church in India – 1.5 million[25]
- Evangelical Lutheran Church in Papua New Guinea – 0.9 million[26]
- Andhra Evangelical Lutheran Church – 0.8 million[27]
- Evangelical Church of the Lutheran Confession in Brazil – 0.7 million[28]
- Evangelical Lutheran Church in Namibia – 0.6 million[29]
- Evangelical Lutheran Church in Southern Africa – 0.6 million[30]
- Reformed churches – 75 million
- Presbyterianism – 40 million
- Presbyterian Church of East Africa – 4 million[31]
- Presbyterian Church of Africa – 3.4 million[32]
- Presbyterian Church (U.S.A.) – 3.0 million
- United Church of Canada – 2.5 million
- Church of Christ in Congo-Presbyterian Community of Congo – 2.5 million[33]
- Presbyterian Church of Korea – 2.4 million[34]
- Presbyterian Church of Cameroon – 1.8 million[35]
- Church of Scotland – 1.1 million[36]
- Presbyterian Church of the Sudan – 1 million[37]
- Presbyterian Church in Cameroon – 0.7 million[38]
- Presbyterian Church of Ghana – 0.6 million[39]
- Presbyterian Church of Nigeria – 0.5 million[40]
- Uniting Presbyterian Church in Southern Africa – 0.5 million[41]
- Continental Reformed churches – 30 million
- Church of Jesus Christ in Madagascar – 3.5 million[42]
- United Church of Zambia – 3.0 million[43]
- Protestant Church in the Netherlands – 2.5 million[44]
- Swiss Reformed Church – 2.4 million
- Evangelical Church of Cameroon – 2 million[45]
- Protestant Evangelical Church in Timor – 2 million[46]
- Christian Evangelical Church in Minahasa – 0.7 million[47]
- United Church in Papua New Guinea – 0.6 million[48]
- United Church of Christ in the Philippines – 0.6 million[49]
- Protestant Church in Western Indonesia – 0.6 million[50]
- Evangelical Christian Church in Tanah Papua – 0.6 million[51]
- Protestant Church in the Moluccas – 0.6 million[52]
- Reformed Church in Hungary – 0.6 million[53]
- Reformed Church in Romania – 0.6 million[54]
- Uniting Reformed Church in Southern Africa – 0.5 million[55]
- Congregationalism – 5 million
- United Church of Christ – 1.2 million
- Evangelical Congregational Church in Angola – 0.9 million[56]
- United Congregational Church of Southern Africa – 0.5 million[57]
- Presbyterianism – 40 million
- Anabaptism and Free churches – 5 million
- Brethren – 1.5 million[58]
- Mennonites – 1.5 million
- Plymouth Brethren – 1 million[59]
- Moravians – 0.7 million[60]
English: Southern side of the Church of the Nativity (formerly Utica Reformed Presbyterian Church), a Roman Catholic church located located at 126 N. Main Street (State Route 13) in Utica, , . Church profile. (Photo credit: Wikipedia)
- Amish – 0.2 million
- Hutterites – 0.2 million
- Quakers – 0.4 million
- Waldensians – 0.05 million
- Baptist churches – 105 million[4]
- Modern Christian movements – 588 million[61]
- Pentecostalism – 130 million
- Assemblies of God – 60 million
- New Apostolic Church – 11 million
- International Circle of Faith – 11 million[62]
- The Pentecostal Mission – 10 million
- Church of God (Cleveland) – 9 million
- International Church of the Foursquare Gospel – 8 million
- Church of God in Christ – 5.5 million
- Apostolic Church – 6 million
- Christian Congregation of Brazil – 2.5 million
- Universal Church of the Kingdom of God – 2 million
Greek orthodox clergy waiting for their patriarch (Photo credit: Government Press Office (GPO))
- Church of God of Prophecy – 1 million
- God is Love Pentecostal Church – 0.8 million
- Indian Pentecostal Church of God – NA
- Non-denominational evangelicalism – 80 million
- Calvary Chapel – 25 million
- Born Again Movement – 20 million
- Association of Vineyard Churches – 15 million
- New Life Fellowship – 10 million[citation needed]
- True Jesus Church – 2.5 million
- Charismatic Episcopal Church – NA
- African initiated churches – 40 million
- Zion Christian Church – 15 million
- Eternal Sacred Order of Cherubim and Seraphim – 10 million
- Kimbanguist Church – 5.5 million
- Church of the Lord (Aladura) – 3.6 million[63]
- Council of African Instituted Churches – 3 million[64]
- Church of Christ Light of the Holy Spirit – 1.4 million[65]
- African Church of the Holy Spirit – 0.7 million[66]
- African Israel Niniveh Church[67]
- Seventh-day Adventist Church – 17 million
- Restoration Movement – 7 million
- Churches of Christ – 5 million
- Christian Churches and Churches of Christ – 1.1 million[10]
- Christian Church (Disciples of Christ) – 0.7 million
- Pentecostalism – 130 million
Eastern Orthodoxy – 210 million
- Autocephalous churches
- Russian Orthodox Church – 125 million
- Romanian Orthodox Church – 18 million
- Serbian Orthodox Church – 15 million
- Church of Greece – 11 million
- Bulgarian Orthodox Church – 10 million
- Georgian Orthodox Church – 5 million
- Greek Orthodox Church of Constantinople – 3.5 million
- Greek Orthodox Church of Antioch – 2.5 million
- Greek Orthodox Church of Alexandria – 1.5 million
- Orthodox Church in America – 1.2 million
- Polish Orthodox Church – 1 million
- Albanian Orthodox Church – 0.8 million
- Cypriot Orthodox Church – 0.7 million
- Greek Orthodox Church of Jerusalem – 0.14 million
- Czech and Slovak Orthodox Church – 0.07 million
- Autonomous churches
- Ukrainian Orthodox Church (Moscow Patriarchate) – 7.2 million[68]
- Moldovan Orthodox Church – 3.2 million
- Russian Orthodox Church Outside Russia – 1.25 million
- Metropolitan Church of Bessarabia – 0.62 million
- Orthodox Ohrid Archbishopric – 0.34 million
- Estonian Orthodox Church – 0.3 million
- Patriarchal Exarchate in Western Europe – 0.15 million
- Finnish Orthodox Church – 0.08 million
- Chinese Orthodox Church – 0.03 million
- Japanese Orthodox Church – 0.02 million
- Latvian Orthodox Church – 0.02 million
- Non-universally recognized churches
- Ukranian Orthodox Church (Kyiv Patriarchate) – 5.5 million[68]
- Belarusian Autocephalous Orthodox Church – 2.4 million
- Macedonian Orthodox Church – 2 million
- Orthodox Church of Greece (Holy Synod in Resistance) – 0.75 million
- Old Calendar Romanian Orthodox Church – 0.50 million
- Old Calendar Bulgarian Orthodox Church – 0.45 million
- Croatian Orthodox Church – 0.36 million
- Montenegrin Orthodox Church – 0.05 million
- Orthodox Church in Italy – 0.12 million
- Other separated Orthodox groups
- Old Believers – 1.8 million
- Greek Old Calendarists – 0.86 million
- Russian True Orthodox Church – 0.85 million
Oriental Orthodoxy – 75 million
- Autocephalous churches in communion
- Ethiopian Orthodox Tewahedo Church – 45 million
- Coptic Orthodox Church of Alexandria – 15.5 million
- Syriac Orthodox Church – 10 million
- Armenian Orthodox Church – 8 million
- Eritrean Orthodox Tewahedo Church – 2.5 million
- Indian (Malankara) Orthodox Church – 2 million[69]
- Armenian Orthodox Church of Cilicia – 1.5 million
- Autonomous churches in communion
- Jacobite Syrian Orthodox Church – 2.5 million
- Armenian Patriarchate of Constantinople – 0.42 million
- Armenian Patriarchate of Jerusalem – 0.34 million
- French Coptic Orthodox Church – 0.01 million
- British Orthodox Church – 0.01 million
- Churches not in communion
- Malabar Independent Syrian Church – 0.06 million
Anglicanism – 82 million
- Anglican Communion – 80 million[70]
- Church of Nigeria – 18 million
- Church of England – 13.4 million
- Church of Uganda – 8.8 million
- Church of South India – 3.8 million
- Anglican Church of Australia – 3.7 million
- Episcopal Church in the Philippines – 3.0 million
- Anglican Church in Aotearoa, New Zealand and Polynesia – 2.5 million
- Anglican Church of Tanzania – 2.5 million
- Anglican Church of Southern Africa – 2.4 million
- Episcopal Church of the United States – 2.2 million
- Anglican Church of Canada – 2.0 million
- Anglican Church of Kenya – 1.5 million
- Church of North India – 1.3 million
- Church of the Province of Rwanda – 1 million
- Church of Pakistan – 0.8 million
- Anglican Church of Burundi – 0.8 million[71]
- Church of the Province of Central Africa – 0.6 million
- Church of Christ in Congo-Anglican Community of Congo – 0.5 million[72]
- Scottish Episcopal Church – 0.4 million
- Church of Ireland – 0.4 million
- Continuing Anglican movement – 1.5 million
- Traditional Anglican Communion – 0.5 million
- Anglican Church in North America – 0.1 million
Nontrinitarianism – 27 million
- Latter Day Saint movement (Mormonism) – 14 million
- The Church of Jesus Christ of Latter-day Saints – 13.5[73]
- Community of Christ – 0.25 million[74]
- Jehovah’s Witnesses – 7.1 million
- Iglesia ni Cristo – 6 million[75]
- Oneness Pentecostalism – 6 million
- United Pentecostal Church International – 4 million
- Pentecostal Assemblies of the World – 1.5 million
- Church of Christ, Scientist – 0.4 million
- Friends of Man – 0.07 million
- Christadelphians – 0.05 million
Nestorianism – 1 million
National Baptist Evangelical Life and Soul Saving Assembly of the U.S.A. (Photo credit: Wikipedia)
- Assyrian Church of the East – 0.5 million
- Ancient Church of the East – 0.3 million
From Bible Press.com
1catholicsalmon 
Biltrix
/ July 26, 2012I met a Nestorian once. He was a classmate of mine in an upper-level summer Latin course in NY.
I was surprised when I found out he was Nestorian, because I did not know there were still any around (shows my ignorance). Real nice guy, though. Super-intelligent and morally solid through and through.
Now I see there’s roughly 1 million of them in the world. I guess the odds were that I should eventually meet up with one some day, and actually know about it, if I talked to enough people.
1catholicsalmon
/ July 26, 2012I don’t know much about Nestorianism at all. Some interesting denominations here to learn more about.
I learned from a novel I read that the Quakers originated in England. Fascinating. Since reading this I’ve been on the look-out for Quaker Rooms. They aren’t obvious if you are unaware of their existence. I have become aware of Christian Scientology buildings as well. Mostly because of the press reports regarding famous Scientologists.
I noticed that the ‘Free Church’ is not listed here. Any thoughts about why not?