# Christianity by country

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As of the year 2025, Christianity has around 1.2 billion true adherents and is the 2nd largest religion by population and the one that has experienced the greatest decline due to the rise of atheism. While now considered widely outdated, according to a PEW estimation in 2020, Christians made up to 2.38 billion of the worldwide population of about 8 billion people. It represents nearly one-third of the world's population and is the largest religion in the world, with 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 (if it is considered a single group), or the Eastern Orthodox Church (if Protestants are considered to be divided into multiple denominations).
According to a 2012 Pew Research Center study, of the then 232 countries and territories, 157 had Christian majorities.
Christianity is the predominant religion and faith in Europe, the Americas, the Philippines, East Timor, 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 15 nations: Argentina (Catholic Church), 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.

## Lists

Population data are compiled using statistical science and are subject to observational error; these numbers should therefore be considered estimates only. The total number of Christians for each country is based on the number of people who are members of a Christian denomination or who identify themselves as Christian, plus their children. The number of people who actually believe in God or who regularly attend church is not addressed.

### Top ten by numbers

A list of the top ten countries by largest number of Christians according to Pew Research Center in 2010.
| Rank | Country | Christians | % Christian |
| 1 | United States | 246,790,000 | 79.5% |
| 2 | Brazil | 175,700,000 | 81.6% |
| 3 | Mexico | 107,780,000 | 95.0% |
| 4 | Russia | 105,220,000 | 73.6% |
| 5 | Philippines | 86,790,000 | 93.1% |
| 6 | Nigeria | 80,510,000 | 50.8% |
| 7 | China | 67,070,000 | 5.0% |
| 8 | Congo DR | 63,150,000 | 95.7% |
| 9 | Germany | 58,240,000 | 70.8% |
| 10 | South Africa | 52,886,000 | 85.3% |

### Top ten by percentage

A list of the top ten countries by highest percentage of the population that is Christian according to Pew Research Center in 2010.
| Rank | Country | % Christian | Christians |
| 1 | Vatican City | 100.0% | 800 |
| 2 | Romania | 99.0% | 21,490,000 |
| 3 | Papua New Guinea | 99.0% | 6,860,000 |
| 4 | Timor-Leste | 99.0% | 1,120,000 |
| 5 | Tonga | 99.0% | 100,000 |
| 6 | Armenia | 98.5% | 3,090,000 |
| 7 | Namibia | 97.6% | 2,280,000 |
| 8 | Moldova | 97.5% | 3,570,000 |
| 9 | Solomon Islands | 97.5% | 520,000 |
| 10 | Marshall Islands | 97.5% | 50,000 |

### Other states

| State | Christians | % Christian |
| Abkhazia (details) | 130,000 | 68.0% |
| Kosovo (details) | 150,000 | 8.7% |
| Palestine (details) | 173,000 | 3.0% |
| Sahrawi Arab Democratic Republic (details) | 200 | 0.03% |
| South Ossetia (details) | 69,000 | 96.4% |
| Taiwan (details) | 902,000 | 3.9% |
| Transnistria (details) | 510,000 | 95.0% |
| Vatican City (details) | 836 | 100.0% |

## Population growth

According to World Population Review, there were 2.38 billion Christians around the world in 2021. According to a 2012 Pew Research Center survey, if current trends continue, Christianity will remain the world's largest religion by year 2050. According to a 2015 Pew Research Center study, Christianity is estimated to reach 3 billion adherents out of a projected population of 9.3 billion people in 2050, achieving parity with Muslim populations for the first time in history, which are predicted to be about 2.8 billion in 2050.
Demographics of major traditions within Christianity (Pew Research Center, 2010 data) :
| Tradition | Followers | % of the Christian population | % of the world population | Follower dynamics | Dynamics inside and outside Christianity |
| Catholicism | 1,200,000,000 | 52.4 | 15.9 | Growing | Stable |
| Protestantism | 800,640,000 | 34.9 | 11.6 | Growing | Growing |
| Orthodoxy | 260,380,000 | 11.4 | 3.8 | Growing | Growing |
| Other Christianity | 28,430,000 | 1.3 | 0.4 | Growing | Growing |
| Christianity | 2,289,450,000 | 100 | 31.7 | Growing | Stable |