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 Orthodox Church
Politics, wars, persecutions, oppressions, and related potential threats can make precise counts of Orthodox membership difficult to obtain at best in some regions. Historically, forced migrations have also altered demographics in relatively short periods of time. The most reliable estimates currently available number Orthodox adherents at around 200 million worldwide, making Eastern Orthodoxy the second largest Christian communion in the world after the Catholic Church. 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. According to the 2015 Yearbook of International Religious Demography, the Eastern Orthodox population in 2010 decreased to 4% of the global population from 7.1% of the global population in 1910. According to the same source, in terms of the total Christian population, the relative percentages were 12.2% and 20.4% respectively. According to the Pew Research Center, the Eastern Orthodox share of the world's total Christian population was 12% in 2011.