Eastern Orthodoxy by country

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, with the most common estimates of adherents being around 220 million. Eastern Orthodox Church is the third-largest religious community in the world, after Sunni Islam and the Catholic Church.

Source: Wikipedia — Eastern Orthodoxy by country (CC BY-SA 4.0)