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. The most common estimates of the number of Eastern Orthodox Christians worldwide is approximately 200–260 million. The numerous Protestant groups in the world, if taken all together, outnumber the Eastern Orthodox, but they differ theologically and do not form a single communion.
Eastern Catholic Churches
Eastern Catholic Churches make up a small percentage of the membership in the Catholic Church when compared to the Latin Church, which has over 1.2 billion members. The 2017 statistics collected by the Catholic Near East Welfare Association (CNEWA) show that Syriac Christians make up 51% of Eastern Catholics and Greek Catholics make up 42%, the remainder being of Armenian (4%) and Alexandrian (2.4%) tradition. The same statistics also show that the four largest Eastern churches are the Byzantine Ukrainian Greek Catholic Church with 4.5 million members (in 2017, 25% of all Eastern Catholics), the Syriac Syro-Malabar Catholic Church at 4.3 million faithful (in 2008, 24%), the Maronite Church with 3.5 million adherents (20%), and the Melkite Greek Catholic Church with more than 1.5 million members around the world.
The list shows that an individual autonomous particular church may have distinct jurisdictions (local particular churches) in several countries.