This category includes Christians from a variety of denominations. About 50% are Catholic, 37% are Protestant or Anglican, 12% are Greek or Russian Orthodox, and the final 1% include the Church of Jesus Christ of Latter-day Saints, Christian Scientists and Jehovah’s Witnesses.
The Islamic category includes two main groupings, Sunni and Shia. The overwhelming majority of Muslims are Sunnis at about 90%, with only 1/10th of Muslims being Shia Muslims. Due to the lack of data on population differences among Muslim in the world, they are recorded together.
This category includes atheists (believe there is no higher power), agnostics (are unsure of a higher power), and people who do not identify with any specific religion. However, many religiously unaffiliated have partial religious beliefs.
Due to a lack of census or survey data on Hindus in many countries, reliable estimates of the global size of various Hindu subgroups are not available.
The three major branches of Buddhism in the modern world are Mahayana, Theravada and Vajrayana (also known as Tibetan). The Buddhist population also include members of other groups that identify as Buddhist, such as Soka Gakkai and Hoa Hao.
These are people of faith that belong to a specific ethnicity or tribe. There are often no formal creeds or sacred texts. Examples include African traditions, Chinese folk stories, Native American worship, and Australian aboriginals.
This data is based on people who self-identify as Jewish. The figures could be larger if a broader definition (such as having a Jewish grandparent) or smaller if a tighter definition (such as an unbroken line of matrilineal Jewish descent) were imposed.
This category includes followers of religions that are not specifically measured due to their small size: Some of which include the Baha’i faith, Taoism, Jainism, Shintoism, Sikhism, Tenrikyo, Wicca, Zoroastrianism and more.