Question: How many people take part in Eastern Orthodox?

Eastern Orthodoxy by country














Part of a series on theEastern Orthodox ChurchMosaic of Christ Pantocrator, Hagia Sophia
Overview

Structure
Theology(History of theology)
Liturgy
Church history
Holy Mysteries
View of salvation
View of Mary
View of icons

Background
Crucifixion/Resurrection/Ascension
of Jesus

Christianity
Christian Church
Apostolic succession
Four Marks of the Church
Orthodoxy

Organization
Autocephaly
Patriarchate
Ecumenical Patriarch
Episcopal polity
Clergy
Bishops
Priests
Deacons
Monasticism
Degrees of monasticism

Autocephalous jurisdictionsAutocephalous Churches who are officially part of the communion:

Constantinople
Alexandria
Antioch
Jerusalem
Serbia
Romania
Bulgaria
Georgia
Cyprus
Greece
Poland
Albania
Czech lands and Slovakia

Autocephaly recognized universally de facto,   by some Autocephalous Churches de jure. Canonicity mostly recognized:

America

Partially recognized autocephaly by Constantinople and Church of Greece. Canonicity mildly recognized:

Ukraine

Autocephalous Church who retains a connection with the Communion, but cut ties with the 'Main Church'/Primus inter pares over reasons:

Russia

Noncanonical jurisdictions
Old Believers
Spiritual Christianity
True Orthodoxy
Catacomb Church
Old Calendarists

National:

Abkhazina
Belarus
Indonesia
Italy
Montenegro
North Macedonia
Turkey

Syncretic Orthodox Catholic Churches:

Evangelical Orthodox
Western Orthodoxy


Celts
France
Gaul

Ecumenical councils
Seven Ecumenical Councils:

First
Second
Third
Fourth
Fifth
Sixth
Seventh

Other important councils:

Quinisext Council
Constantinople IV
Constantinople V
Jassy
Jerusalem
(Synod of) Constantinople

History
Church Fathers
Pentarchy
Byzantine Empire
Christianization of Bulgaria
Christianization of Kievan Rus'
Great Schism
Russia
Ottoman Empire
North America
Moscow–Constantinople schism
1996
2018

Theology
History of Eastern Orthodox theology
(20th century (Neo-Palamism))

Apophaticism
Chrismation
Contemplative prayer
Essence vs. Energies
Hesychasm
Holy Trinity
Hypostatic union
Icons
Metousiosis
Mystical theology
Nicene Creed
Nepsis
Oikonomia
Ousia
Palamism
Philokalia
Phronema
Sin
Theosis
Theotokos

Differences from the Catholic Church
Opposition to the Filioque
Opposition to papal supremacy
Liturgy and worship
Divine Liturgy
Divine Services

Akathist
Apolytikion
Artos
Ectenia
Euchologion
Holy Water
Iconostasis
Jesus Prayer
Kontakion
Liturgical entrances
Liturgical fans
Lity
Memorial service
Memory Eternal
Omophorion
Orthodox bowing
Orthodox marriage
Praxis
Paraklesis
Paschal greeting
Paschal Homily
Paschal troparion
Prayer rope
Prosphora
Russian bell ringing
Semantron
Sign of the cross
Sticheron
Troparion
Vestments
Use of incense

Liturgical calendar
Paschal cycle
12 Great Feasts
Other feasts:

Feast of Orthodoxy
Intercession of the Theotokos

The four fasting periods:

Nativity Fast
Great Lent
Apostles' Fast
Dormition Fast

Major figures
Athanasius of Alexandria
Ephrem the Syrian
Basil of Caesarea
Cyril of Jerusalem
Gregory of Nazianzus
Gregory of Nyssa
John Chrysostom
Cyril of Alexandria
John Climacus
Maximus the Confessor
John of Damascus
Theodore the Studite
Kassiani
Cyril and Methodius
Photios I of Constantinople
Gregory Palamas

Other topics
Architecture
Encyclical of the Eastern Patriarchs
Orthodox cross
Saint titles
Statistics by country
vt
Based on the numbers of adherents, the Eastern Orthodox Church (also known as Eastern Orthodoxy) is the second largest Christian communion in the world after the Roman Catholic Church.[1] The most common estimates of the number of Eastern Orthodox Christians worldwide is approximately 200–260 million.[2][3][4][5] The numerous Protestant groups in the world, if taken all together, outnumber the Eastern Orthodox,[6] but they differ theologically and do not form a single communion.[7]
Eastern Orthodoxy is the largest single religious faith in the world's largest country by area: Russia (41%[8][9]-77%),[10][11][12] where roughly half of the Eastern Orthodox Christians live. It is the majority religion in  Ukraine (65.4%[13]-77%),[14] Romania (82%),[15] Belarus (48%[16]-73%[17]) Greece (95%-98%),[15] Serbia (85%),[15] Bulgaria (88%),[15] Moldova (93%),[15] Georgia (84%),[15] Macedonia (65%),[15] Cyprus (89%),[15] Montenegro (72%),[15] Estonia (14%), and it is also predominant in the disputed territories of Abkhazia, South Ossetia and Transnistria.
Significant minorities, making up between 1 and 31 per cent of the population, are present in several European countries: Bosnia and Herzegovina (31%),[15] Latvia (18%), Albania (7%),[18] Lithuania (4%), Croatia (4%), Slovenia (2%), and Finland (1.5%). In Asia, around the former USSR, Eastern Orthodoxy constitutes the dominant religion in northern Kazakhstan, representing 23.9%,[19] of the population of the region, and is also a significant minority in Kyrgyzstan (17%), Turkmenistan (5%), Uzbekistan (5%), Azerbaijan (2%),[15] and Tajikistan (1%). In Lebanon, 8% are Eastern Orthodox.[20] In Syria, 5-8% were Eastern Orthodox prior to the war, and Eastern Orthodox Christians represent between 0.5% and 2.5% in Palestine,[21] and over 1% in Jordan. Recent immigration and missionary activity raised the numbers of the Eastern Orthodox community in Catholic and Protestant countries such as Australia, Austria, Germany, Italy, Spain, Canada and Switzerland to roughly 2% of the population in each.
The percentage of Christians in Turkey fell from 19 percent in 1914 to 2.5 percent in 1927,[22] due to events which had a significant impact on the country's demographic structure, such as the Armenian Genocide, the population exchange between Greece and Turkey,[23] and the emigration of Christians to foreign countries (mostly in Europe and the Americas).[24] Today there are more than 160,000 people of different Christian denominations.[25]
Eastern Orthodox population by country
The number of members of the Eastern Orthodox Church in each country has been subject to a lot of debate. Each study performed that seeks to discover the number of adherents in a country may use different criteria, and be submitted to different populations. As such, some numbers may be inflated, and therefore inaccurate. Examples of this are Greece and Russia, where estimates of adherence to Eastern Orthodoxy may reach 80-98%, but where surveys found lower percentages professing Eastern Orthodoxy or belief in God. The likely reason for this disparity is that many people in these majority Eastern Orthodox countries will culturally identify with the Eastern Orthodox Church, especially if they were baptized as children, even if they are not currently practicing. This includes those who may be irreligious, yet culturally identify with the Eastern Orthodox Church, or for whom Eastern Orthodox Christianity is listed on official state records. Other cases of incongruent data also might be due to counting ethnic groups from Eastern Orthodox countries rather than actual adherents. A case of this is the United States, which has large numbers of immigrants from Eastern Orthodox countries. The Eastern Orthodox jurisdictions often reported large numbers of members, which together would total 2-3 million across the country. However, a 2010 study by Alexei Krindatch sought data from each parish, with the specific criteria of annual participation. This study produced the "Atlas of American Orthodox Christian Churches", and discovered that there were only about 817,000 Eastern Orthodox Christians actively practicing their faith (that is to say, attending church services on a regular basis) in the United States. The study explained that such a difference was due to a variety of circumstances, for example the higher numbers having counted all people who self-identify as Eastern Orthodox on a census regardless of active participation, or all people belonging to ethnic groups originating in Eastern Orthodox countries. This study, while initially controversial, proved groundbreaking, and has since been officially approved for use by the Assembly of Canonical Orthodox Bishops of the United States of America.
As such, any data used to figure the population of Eastern Orthodox per nation, should be understood as estimated rather than exact. Additionally, total numbers of Eastern Orthodox Christians throughout the world may be anywhere from 150 million to 300 million, depending on the studies and definitions which are used.


Eastern Orthodox Church by jurisdiction

Autocephalous Orthodox Churches
The Eastern Orthodox Church is organized as a union of several autocephalous subdivisions, which are also called "Churches" (or, sometimes, "jurisdictions"). Some are associated with a specific country, while others are not. This table presents some known data regarding individual jurisdictions. "NA" means that data is not available.

Notes