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Orthodox - Religious Tradition

Orthodox Christianity represents one of the three great divisions of Christianity; the others are the Protestant churches and the Roman Catholic Church. The Catholic and Orthodox churches originally were united, but they parted in the 11th century when they differed over several points of doctrine, including the supreme authority of the pope, which Orthodox Christians reject. Since the 20th century, the Catholic and Orthodox churches have made greater efforts toward reconciliation. Orthodox churches include the Greek Orthodox Archdiocese of America and the Orthodox Church in America.

Maps: Orthodox1

Adherence Rate per 1,000 (2020)

Congregations (2020)

Top 5 Orthodox States (2020)1 [View all States]

Rank State Adherents Adherence Rate
1 District Of Columbia 12,930 18.80
2 Alaska 10,993 15.00
3 New Jersey 78,816 8.50
4 Massachusetts 58,432 8.30
5 Rhode Island 7,653 7.00

Top 5 Orthodox Counties (2020)1 [View all counties]

Rank County Adherents Adherence Rate
1 Lake and Peninsula Borough, Alaska 663 449.20
2 Dillingham Census Area, Alaska 1,185 244.00
3 Bethel Census Area, Alaska 3,613 193.60
4 Kusilvak Census Area, Alaska 983 117.50
5 Aleutians East Borough, Alaska 290 84.80

Top 5 Orthodox Metro Areas (2020)1 [View all Metro Areas]

Rank Metro Area Adherents Adherence Rate
1 Worthington, MN Micro Area 300 13.50
2 Craig, CO Micro Area 150 11.30
3 Nashville-Davidson--Murfreesboro--Franklin, TN Metro Area 20,924 10.50
4 Bridgeport-Stamford-Norwalk, CT Metro Area 10,063 10.50
5 Worcester, MA-CT Metro Area 9,914 10.10

Orthodox Groups: Adherence Rates (1980 - 2020)1

Group Family Adh. Rate 2020 Adh. Rate 2010 Adh. Rate 2000 Adh. Rate 1990 Adh. Rate 1980
Albanian Orthodox Archdiocese of the Orthodox Church in America Eastern Liturgical (Orthodox) 0.02 0.00
Albanian Orthodox Diocese of America Eastern Liturgical (Orthodox) 0.00 0.00 0.00 0.00
American Carpatho-Russian Orthodox Diocese of the USA Eastern Liturgical (Orthodox) 0.02 0.03 0.07 0.06 0.00
Antiochian Orthodox Christian Archdiocese of North America Eastern Liturgical (Orthodox) 0.21 0.24 0.29
Armenian Apostolic Church (Catholicosate of Cilicia) Eastern Liturgical (Orthodox) 0.11 0.10 0.16 0.29 0.05
Armenian Apostolic Church (Catholicosate of Etchmiadzin) Eastern Liturgical (Orthodox) 0.29 0.21 0.33
Belarusian Autocephalous Orthodox Church Eastern Liturgical (Orthodox)
Bulgarian Diocese of the Orthodox Church in America Eastern Liturgical (Orthodox) 0.03
Bulgarian Eastern Orthodox Diocese of the USA, Canada, and Australia Eastern Liturgical (Orthodox) 0.02 0.01 0.02
Church of the Genuine Orthodox Christians of America Eastern Liturgical (Orthodox) 0.02
Coptic Orthodox Church Eastern Liturgical (Orthodox) 0.54 0.30
Eritrean Orthodox Church Eastern Liturgical (Orthodox) 0.13 0.04
Ethiopian Orthodox Church Eastern Liturgical (Orthodox) 0.29
Georgian Orthodox Church in North America Eastern Liturgical (Orthodox) 0.00 0.00
Greek Orthodox Archdiocese of America Eastern Liturgical (Orthodox) 1.13 1.54 1.52 0.00
Greek Orthodox Archdiocese of Vasiloupolis Eastern Liturgical (Orthodox) 0.11
Holy Apostolic Catholic Assyrian Church of the East Eastern Liturgical (Orthodox) 0.12 0.14 0.00
Holy Orthodox Church in North America Eastern Liturgical (Orthodox) 0.00 0.01 0.01
Macedonian Orthodox Church: American-Canadian Diocese Eastern Liturgical (Orthodox) 0.05 0.05 0.06
Malankara (Indian) Orthodox Syrian Church Eastern Liturgical (Orthodox) 0.07 0.05 0.05
Malankara Archdiocese of the Syrian Orthodox Church in North America Eastern Liturgical (Orthodox) 0.02 0.02 0.02
North American and Europe Region of the Knanaya Archdiocese of the Syriac Orthodox Church of Antioch Eastern Liturgical (Orthodox) 0.01
Orthodox Church in America, The Eastern Liturgical (Orthodox) 0.22 0.28 0.27 0.00
Patriarchal Parishes of the Russian Orthodox Church in the U.S.A. Eastern Liturgical (Orthodox) 0.03 0.04
Romanian Orthodox Episcopate of America (Diocese of the Orthodox Church in America) Eastern Liturgical (Orthodox) 0.06 0.00
Romanian Orthodox Metropolia of the Americas Eastern Liturgical (Orthodox) 0.02 0.04 0.03 0.07
Russian Orthodox Church Outside of Russia, The Eastern Liturgical (Orthodox) 0.07 0.09
Serbian Metropolitanate of New Gracanica Eastern Liturgical (Orthodox)
Serbian Orthodox Church in North and South America Eastern Liturgical (Orthodox) 0.18 0.22 0.20
Syriac-Greek Antiochian Orthodox Catholic Church Eastern Liturgical (Orthodox)
Syrian (Syriac) Orthodox Church of Antioch Eastern Liturgical (Orthodox) 0.04 0.05 0.05 0.12 0.11
Ukrainian Orthodox Church of the U.S.A. Eastern Liturgical (Orthodox) 0.05 0.07 0.13 0.02
Vicariate for the Palestinian and Jordanian Orthodox Christian Communities in America Eastern Liturgical (Orthodox) 0.02


1 The 2020 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include data for 372 religious bodies or groups. Of these, the ASARB was able to gather data on congregations and adherents for 217 and on congregations only for 155. [More information on the data sources]

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