Berdasarkan pada jumlah pengikut, Gereja Ortodoks Timur (juga dikenal sebagai Ortodoks Timur) adalah persekutuan Kristen terbesar kedua di dunia setelah Gereja Katolik Roma.[1] Perkiraan paling umum dari jumlah umat Kristen Ortodoks Timur di seluruh dunia adalah sekitar 200–260 juta.[2][3][4][5] Jumlah kelompok Protestan di seluruh dunia, jika dihitung secara keseluruhan, mengalahkan jumlah Ortodoks Timur,[6] namun karena gereja-gereja Protestan memiliki perbedaan teologi, Protestan tidak membentuk sebuah persekutuan tunggal.[7]
Populasi Ortodoks Timur menurut negara
Pengikut agama Gereja Ortodoks Timur menurut negara
^Adherents (28 October 2005). "Christianity". Major Branches of Religions Ranked by Number of Adherents. Diarsipkan dari versi asli tanggal 2015-03-15. Diakses tanggal 18 December 2016.
^Greek Orthodox Archdiocese of America (2016). "The Greek Orthodox Archdiocese of America". Diakses tanggal 18 December 2016. The Orthodox Church today, numbering over 250 million worldwide, is a communion of self governing Churches, each administratively independent of the other, but united by a common faith and spirituality.
^Jay Diamond, Larry. Plattner, Marc F. and Costopoulos, Philip J. World Religions and Democracy. 2005, page 119.(also in PDF fileDiarsipkan 2008-04-13 di Wayback Machine., p49), saying "Not only do Protestants presently constitute 13 percent of the world's population—about 800 million people—but since 1900 Protestantism has spread rapidly in Africa, Asia, and Latin America." "Archived copy"(PDF). Diarsipkan dari versi asli(PDF) tanggal March 25, 2009. Diakses tanggal 2013-07-03.
^ ???????????? ???? ????????? ? ??? ????? ?????? ?????? (dalam bahasa Russian). Interfax Russia. 2009-12-07.Tidak memiliki atau membutuhkan |url= (bantuan)Pemeliharaan CS1: Bahasa yang tidak diketahui (link)
^"Popis stanovništva, domacinstava i stanova u Crnoj Gori 2011. godine" [Census of Population, Households and Dwellings in Montenegro 2011] (PDF) (Siaran pers) (dalam bahasa Serbo-Croatian and English). Statistical office, Montenegro. 12 July 2011. Diakses tanggal 30 March 2011.Pemeliharaan CS1: Bahasa yang tidak diketahui (link)
^There is no official census of Agama di Russia, and estimates are based on surveys only. In August 2012, ARENA determined that about 46.8% of Russians are Christians (including Orthodox, Catholic, Protestant, and non-denominational), which is slightly less than an absolute 50%+ majority. However, later that year the Levada CenterDiarsipkan 2012-12-31 di Wayback Machine. determined that 76% of Russians are Christians, and in June 2013 the Public Opinion Foundation determined that 65% of Russians are Christians. These findings are in line with Pew's 2010 survey, which determined that 73.6% of Russians are Christians, with VTSIOMDiarsipkan 2020-09-29 di Wayback Machine.'s 2010 survey (~77% Christian), and with Ipsos MORIDiarsipkan 2013-01-17 di Wayback Machine.'s 2011 survey (69%).