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
Totalling about 16 million members, the greatest numbers of Eastern Catholics may be found in Eastern Europe (Ukraine, Romania, Slovakia), Eastern Africa and the Middle East (Egypt, Iraq, Lebanon, Syria) and India.