Christianity by country
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Christians made up 2.3 billion of the worldwide population of about 8 billion people in 2020 according to a 2025 Pew Research Center study. This represents 28.8% of the world's population. Christianity is the largest religion in the world. The three largest groups of Christians being the Catholic Church, Protestantism, and the Eastern Orthodox Church. The largest Christian denomination is the Catholic Church, with 1.3 billion baptized members. The second largest Christian branch is either Protestantism or the Eastern Orthodox Church depending on whether Protestants are considered to be one group or divided into multiple denominations.
According to the Pew Research Center study, of the 201 countries and territories, 120 had Christian majorities in 2020, four fewer than in 2010.
Christianity is the predominant religion and faith in Europe, the Americas, the Philippines, Sub-Saharan Africa, and Oceania. There are also large Christian communities in other parts of the world, such as Indonesia, Central Asia, the Middle East, and West Africa where Christianity is the second-largest religion after Islam. The United States has the largest Christian population in the world, followed by Brazil, Mexico, Russia, and the Philippines.
Christianity in multiple forms is the state religion of the following 14 nations: Armenia (Armenian Apostolic Church), Tuvalu (Church of Tuvalu), Costa Rica (Catholic Church), Kingdom of Denmark (Evangelical Lutheran Church in Denmark), England (Church of England), Greece (Church of Greece), Georgia (Eastern Orthodox Church), Iceland (Church of Iceland), Liechtenstein (Catholic Church), Malta (Catholic Church), Monaco (Catholic Church), Vatican City (Catholic Church), and Zambia. Christianity used to be the state religion of the former Ethiopian Empire (adopted in 340 A.D. by the Kingdom of Aksum) prior to the government's overthrow.