Eastern Liturgical (Orthodox) Family

The Eastern Liturgical (Orthodox) family 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 were originally 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. Churches in the Eastern Liturgical family include the Greek Orthodox Archdiocese of America and the Orthodox Church in America.

Maps: Eastern Liturgical (Orthodox) Family1

Adherence Rate per 1,000 (2010)

Congregations (2010)

Top 5 Eastern Liturgical (Orthodox) Family States (2010)1 [View all states]

Rank State Adherents Adherence Rate
1 District Of Columbia 14,050 23.30
2 Alaska 13,480 19.00
3 Massachusetts 61,544 9.40
4 New Jersey 72,431 8.20
5 New York 140,297 7.20

Top 5 Eastern Liturgical (Orthodox) Family Counties (2010)1 [View all counties]

Rank County Adherents Adherence Rate
1 Lake and Peninsula Borough, Alaska 1,143 700.80
2 Bristol Bay Borough, Alaska 226 226.70
3 Dillingham Census Area, Alaska 988 203.80
4 Aleutians East Borough, Alaska 599 190.70
5 Bethel Census Area, Alaska 2,852 167.60

Top 5 Eastern Liturgical (Orthodox) Family Metro Areas (2010)1 [View all Metro Areas]

Eastern Liturgical (Orthodox) Family: Adherence Rates (1980 - 2010)1

Group Tradition Adh. Rate 2010 Adh. Rate 2000 Adh. Rate 1990 Adh. Rate 1980
Albanian Orthodox Diocese of America Orthodox 0.00 0.00 0.00
American Carpatho-Russian Orthodox Greek Catholic Church Orthodox 0.03 0.07 0.06 0.00
Antiochian Orthodox Christian Archdiocese of North America Orthodox 0.24 0.29
Apostolic Catholic Assyrian Church of the East, North American Diocese Orthodox 0.12 0.14 0.00
Armenian Apostolic Church of America (Catholicosate of Etchmiadzin) Orthodox 0.21 0.33
Armenian Apostolic Church, Diocese of America Orthodox 0.10 0.16 0.29 0.05
Bulgarian Eastern Orthodox Diocese of the USA, Canada, and Australia Orthodox 0.01 0.02
Byelorussion Council Of Orthodox Churches In North America Orthodox 0.00
Coptic Orthodox Church Orthodox 0.30
Eritrean Orthodox Orthodox 0.04
Ethiopian Orthodox Church in the United States of America Orthodox
Georgian Orthodox Parishes in the United States Orthodox 0.00
Greek Orthodox Archdiocese of America Orthodox 1.54 1.52 0.00
Greek Orthodox Archdiocese of Vasiloupolis Orthodox 0.11
Holy Orthodox Church in North America Orthodox 0.01 0.01
Macedonian Orthodox Church: American Diocese Orthodox 0.05 0.06
Malankara Archdiocese of the Syrian Orthodox Church in North America Orthodox 0.02 0.02
Malankara Orthodox Syrian Church Orthodox 0.05 0.05
Orthodox Church in America, The Orthodox 0.28 0.27 0.00
Orthodox Church in America: Albanian Orthodox Archdiocese Orthodox 0.02 0.00
Orthodox Church in America: Bulgarian Diocese Orthodox 0.03
Patriarchal Parishes of the Russian Orthodox Church in the U.S.A. Orthodox 0.04
Romanian Orthodox Archdiocese in the Americas Orthodox 0.04 0.03 0.07
Romanian Orthodox Episcopate of America Orthodox 0.06 0.00
Russian Orthodox Church Outside of Russia, The Orthodox 0.09
Serbian Orthodox Church in North and South America Orthodox 0.22 0.20
Serbian Orthodox Church in North, Central, and South America (New Gracanica Metropolitanate) Orthodox
Syrian Orthodox Church of Antioch Orthodox 0.05 0.05 0.12 0.11
Ukrainian Orthodox Church of the U.S.A. Orthodox 0.07 0.13 0.02
Vicariate for the Palestinian/Jordanian Orthodox Christian Communities Orthodox 0.02


1 Congregational adherents include all full members, their children, and others who regularly attend services. The adherence rate is the number of people per 1,000 who are an adherent of the group. For example an adherence rate of 600 means that 600 out of every 1,000 people in this area are adherents of the Southern Baptist Convention.

These data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data sources]