This is a very hard question - my Priest told me that we shouldn't think in numbers. However, most estimates are between 250 million to 350 million. Other estimates are much higher including people who are Orthodox on paper but are not actively involved in the Church. Also, this number is steadily increasing in many former Communist countries where people are returning back to the Church. There are also many non-Orthodox parishes accepting the Orthodox faith throughout lands that are not traditionally Orthodox. There are also many millions of Non-Chaledonian Oriental Orthodox Christians, with the largest number in Ethiopia.
Various sources report various results, but none fewer than 440,000. Most facts about the Greek Orthodox Church can be answered by following the link below: http://www.goarch.org/
According to the OCA (Orthodox Churches of America) there are between 1 million and 6 million who call themselves that.
The population of Orthodox Church in America is 22,619.
About 90,000 real ones and about 50,000 nominal ones (by name or tradition only)
Over 350 million
The Orthodox Church of Greece (Eastern Orthodox Church).
They are the Greek Orthodox Church, one of the many branches of The Orthodox Church.
No. Not by many, many years
There is an Orthodox Church and a Catholic Church. There is no Catholic Orthodox Church.
Eastern Orthodox Church (or the Christian Orthodox Church).
The term "Syrian Church" can refer to various churches with Syrian roots, including the Syrian Orthodox Church. The Syrian Orthodox Church is a specific Christian denomination that follows the West Syrian liturgical tradition and is a member of the Oriental Orthodox family of churches. While the Syrian Church may encompass a broader category, the Syrian Orthodox Church is a distinct denomination within that group.
No, the Greek Orthodox church is a part of the Eastern Orthodox Churches.
The Russian Orthodox Church
The majority of Serbs follow Serbian Orthodox Christianity. It is a major religion in Serbia and holds significant cultural and historical importance for the Serbian people.
Anglican Orthodox Church was created in 2001.
The Orthodox Church has seven sacraments: Baptism, Chrismation, Eucharist Confession, Holy Unction, Marriage, and Ordination
The ‘Greek Orthodox’ church only exists in Greece. In the rest of the world, it is known as the Orthodox Christian Faith. The words "greek orthodox" should not be used to describe the Eastern Orthodox Church. Those people who are Greek and Orthodox are Christians and they belong to the Orthodox Christian Faith. There is no nationality in the Orthodox Church. It is open to people of all backgrounds, races and cultures. It is very important because it brings salvation to its members through belief in the Lord Jesus Christ as Son of God and Saviour of the world.