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 an ongoing work-in-progress. The list includes the following Christian denominations: the Catholic Church including the Eastern Catholic Churches; all the Eastern Orthodox and Oriental Orthodox churches with some recognition and their offshoots; Protestant denominations with at least 0.2 million members; all the other Christian branches with distinct theologies, such as Restorationist and Nontrinitarian denominations; the independent Catholic denominations; and the Church of the East. With an estimated 2.42 or 2.3 billion adherents in 2015, Christianity is the largest religious group in the world, and in 2020 there were about 2.6 billion adherents globally. Christian denominational families Christianity – 2.6 billion Catholicism – 1.345 billion Catholicism is the largest branch of Christianity with 1.345 billion, and the Catholic Church is the largest among churches. Figures below are in accordance with the Annuario Pontificio, at 2019. The total figure does not include independent denominations that self-identify as Catholic, numbering some 18 million adherents. Latin Church – 1.327 billion Eastern Catholic Churches – 18 million Byzantine Rite – 8.2 million Ukrainian Greek Catholic Church – 5.5 million Melkite Greek Catholic Church – 1.6 million Romanian Greek Catholic Church – 0.5 million Ruthenian Greek Catholic Church – 0.4 million Hungarian Greek Catholic Church – 0.3 million Slovak Greek Catholic Church – 0.3 million Belarusian Greek Catholic Church – 0.1 million Italo-Albanian Catholic Church – 0.01 million Greek Catholic Church of Croatia and Serbia – 0.01 million Georgian Byzantine Catholic Church – 0.01 million Albanian Greek Catholic Church – 0.01 million Russian Greek Catholic Church – 0.01 million Greek Byzantine Catholic Church – 0.006 million Macedonian Greek Catholic Church – 0.001 million Bulgarian Greek Catholic Church – 0.001 million East Syriac Rite – 4.9 million Syro-Malabar Church – 4.3 million Chaldean Catholic Church – 0.6 million West Syriac Rite – 4.1 million Maronite Church – 3.5 million Syro-Malankara Catholic Church – 0.5 million Syriac Catholic Church – 0.2 million Armenian Rite – 0.8 million Armenian Catholic Church – 0.8 million Alexandrian Rite – 0.5 million Coptic Catholic Church – 0.2 million Eritrean Catholic Church – 0.2 million Ethiopian Catholic Church – 0.07 million Canonically irregular groups Society of Saint Pius X – 1 million Sedevacantists Congregation of Mary Immaculate Queen Independent