|c. 2.4 billion worldwide (2015)|
|Regions with significant populations|
| European Union||373,656,000|
| United States||246,790,000|
| Democratic Republic of the Congo||63,150,000|
- 50% Catholicism: Latin Church, Eastern Catholic Churches
- 37% Protestantism: Adventism, Anglicanism, Baptist churches, Reformed churches, Lutheranism, Methodism, Pentecostalism and other denominations
- 12% Orthodoxy: Eastern Orthodox Church and Oriental Orthodox Churches
- 1% Other Christian traditions: incl. Assyrian Church of the East, Latter Day Saint movement, Jehovah's Witnesses, Unitarianism and Nondenominational churches
- Predominant spoken languages:
Christians (/ (listen)) are people who follow or adhere to Christianity, a monotheistic Abrahamic religion based on the life and teachings of Jesus Christ. The words Christ and Christian derive from the Koine Greek title Christós (Χριστός), a translation of the Biblical Hebrew term mashiach (מָשִׁיחַ).
While there are diverse interpretations of Christianity which sometimes conflict, they are united in believing that Jesus has a unique significance.
The term "Christian" used as an adjective is descriptive of anything associated with Christianity or Christian churches, or in a proverbial sense "all that is noble, and good, and Christ-like." It does not have a meaning of 'of Christ' or 'related or pertaining to Christ'.
According to a 2011 Pew Research Center survey, there were 2.2 billion Christians around the world in 2010, up from about 600 million in 1910. By 2050, the Christian population is expected to exceed 3 billion. According to a 2012 Pew Research Center survey Christianity will remain the world's largest religion in 2050, if current trends continue.
Today, about 37% of all Christians live in the Americas, about 26% live in Europe, 24% live in sub-Saharan Africa, about 13% live in Asia and the Pacific, and 1% live in the Middle East and North Africa. About half of all Christians worldwide are Catholic, while more than a third are Protestant (37%). Orthodox communions comprise 12% of the world's Christians. Other Christian groups make up the remainder. Christians make up the majority of the population in 158 countries and territories. 280 million Christians live as a minority.
Christians have made noted contributions to a range of fields, including the sciences, arts, politics, literatures and business. According to 100 Years of Nobel Prizes, a review of Nobel prizes awarded between 1901 and 2000 reveals that (65.4%) of Nobel Prizes laureates identified Christianity in its various forms as their religious preference.
The Greek word Χριστιανός (Christianos), meaning "follower of Christ", comes from Χριστός (Christos), meaning "anointed one", with an adjectival ending borrowed from Latin to denote adhering to, or even belonging to, as in slave ownership. In the Greek Septuagint, christos was used to translate the Hebrew מָשִׁיחַ (Mašíaḥ, messiah), meaning "[one who is] anointed." In other European languages, equivalent words to Christian are likewise derived from the Greek, such as Chrétien in French and Cristiano in Spanish.
The abbreviations Xian and Xtian (and similarly-formed other parts of speech) have been used since at least the 17th century: Oxford English Dictionary shows a 1634 use of Xtianity and Xian is seen in a 1634-38 diary. The word Xmas uses a similar contraction.