Major world religions have been distinguished from minor religions using a variety of methods, though any such division naturally reflects a particular bias, since many adherent of a religion are likely to consider their own faith "major". Two methods are mentioned in this article, number of adherents and the definitions used by classical scholars of religions.
For a list of all religions, please see the article List of religions.
Defined by population
One way to define a major religion is by the current number of current adherents. Population numbers by religion are computed by combination of census reports and population surveys (in countries where religion data is not collected in census, for example USA or France), but results can vary widely depending on the way questions are phrased, the definitions of religion used, and the bias of the agencies or organizations conducting the survey. Informal or unorganized religions are especially difficult to count.
All religions or belief systems by number of adherents
This listing does not draw distinctions between organized religion, which has a single belief code and religious hierarchies, and informal religions, such as Chinese traditional religions, which are a mix of different informal religious ideas.
Christianity 2 billion
Islam 1.3 billion
- Hinduism 900 million
- Secular/Nonreligious/Agnostic/Atheist 850 million
- Buddhism 360 million
Chinese traditional religion 225 million
- Not a single organized religion, includes elements of Taoism, Confucianism, and traditional nonscriptural religious observance.
Primal indigenous 150 million
- Not a single organized religion, includes a wide range of primarily Asian traditional or tribal religions, including Shamanism and Paganism.
African Traditional and Diasporic 95 million
- Not a single organized religion, this includes traditional African beliefs such as Yoruba as well as Diasporic beliefs such as Santeria and Vodoun.
- Sikhism 23 million
Juche 19 million
- Not considered a religion by adherents. Juche is the political ideology taught by North Korean communists; some have argued it constitutes a religion.
Spiritism 14 million
- Not a single organized religion, includes a variety of beliefs including some forms of Umbanda.
- Judaism 14 million
- Bahá'í Faith 6 million
- Jainism 5 million
- Shinto 4 million
- Cao Dai 3 million
- Tenrikyo 2.4 million
- Neopaganism 1 million
- Unitarian Universalism 800,000
- Not an organized religion
- Scientology 600,000
- Zoroastrianism 150,000
Organized religions by population ranking
The Christian Science Monitor used a separate standard, examining only organized religions. The newspaper listed the following in 1998 as the "Top 10 Organized Religions in the World" based on descending level of population:
- Bahá'í Faith
Major religions have also been identified based on their importance, whether theological or temporal. The earliest Christian scholars, the first to define major religions, recognized only three religions: Christianity, Judaism, and Paganism (which they considered to encompass every other religion). Views evolved during the enlightenment, however, and, by the 19th century, Western scholars considered the five major religions to be Judaism, Christianity, Islam, Hinduism, and Buddhism. As the exposure of Westerners to other religions increased, five other religions were added to the original five: Confucianism, Taoism, Jainism, Shinto and Zoroastrianism. Later, the Bahá'í Faith was added to this list, resulting in eleven classic religions:
- Bahá'í Faith
The standard modern definition of major religion comes from the classical definition, often expanding on "Christianity," and omitting Jainism and Zoroastrianism, like this list found in the New York Public Library Student Reference:
- Bahá'í Faith
- Orthodox Eastern Church
See also: Religions of the world.