This is a list of Christian denominations by number of members. It is inevitably partial and generally based on claims by the denominations themselves. The numbers should therefore be considered approximate and the article is an ongoing work-in-progress.
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The list includes the following Christian denominations: the Catholic Church including the Eastern Catholic Churches as well as independent Catholic denominations, Protestant denominations with at least 0.2 million members (including Anglican churches, which are sometimes described as a via media between Catholicism and Protestantism), the Eastern Orthodox Church (and its offshoots), the Oriental Orthodox Churches (and their offshoots), the branches of the Church of the East and all the other Christian branches with distinct theologies, such as Restorationist and Nontrinitarian denominations.
Christianity is the largest religious group in the world, with an estimated 2.3 to 2.6 billion adherents in 2020.[2][3][4][5]
According to 2015 figures, Christians form the biggest religious group by some margin, with 2.3 billion adherents or 31.2% of the total world population of 7.3 billion.