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.
List of Pentecostals and non-denominational Evangelicals
Numbering 169 million adherents worldwide, Pentecostals and non-denominational evangelicals comprise a significant part of the Christian church, outnumbering more widely recognised groups such as the Baptists (105 million), Lutherans (87 million), Anglicans (77 million), Reformed Churches, i.e. Calvinists, Presbyterians and Congregationalists (75 million), but a smaller proportion than those adhering to Eastern Orthodoxy (260 million). Cf. the Wikipedia page on denomination sizes for sources and further detail.