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.
Christianity
Estimates of the total number of Protestants are very uncertain, but it seems clear that Protestantism is the second largest major group of Christians after Catholicism in number of followers (although the Eastern Orthodox Church is larger than any single Protestant denomination). Often that number is put at more than 800 million, corresponding to nearly 40% of world's Christians. The majority of Protestants are members of just a handful of denominational families, i.e. Adventists, Anglicans, Baptists, Reformed (Calvinists), Lutherans, Methodists and Pentecostals. Nondenominational, evangelical, charismatic, neo-charismatic, independent and other churches are on the rise, and constitute a significant part of Protestant Christianity.