1. Christianity: Current Major Concentration: North and South America, Europe, Africa, Australia. Beliefs: Belief in one God, Jesus Christ as the son of God and savior, and the Bible as the holy text. Demography: About 2.3 billion followers, making it the largest religion in the world.
2. Islam: Current Major Concentration: Middle East, North Africa, Southeast Asia. Beliefs: Belief in one God (Allah) and Muhammad as his prophet, and the Quran as the holy text. Demography: About 1.9 billion followers, making it the second-largest religion in the world.
3. Hinduism: Current Major Concentration: India, Nepal, Mauritius. Beliefs: Belief in multiple gods and goddesses, karma, and reincarnation. Demography: About 1.2 billion followers, making it the third-largest religion in the world.
4. Buddhism: Current Major Concentration: East and Southeast Asia. Beliefs: Belief in the Four Noble Truths, the Eightfold Path, and the concept of Nirvana. Demography: About 535 million followers worldwide.
5. Sikhism: Current Major Concentration: India. Beliefs: Belief in one God, the teachings of the ten gurus, and the Guru Granth Sahib as the holy text. Demography: About 30 million followers worldwide.
6. Judaism: Current Major Concentration: Israel, United States, Europe. Beliefs: Belief in one God, the Torah as the holy text, and the covenant between God and the Jewish people. Demography: About 14 million followers worldwide.
7. Bahá’í: Current Major Concentration: Iran, United States, India. Beliefs: Belief in one God, the unity of all religions and humanity, and the teachings of Baha’u’llah. Demography: About 7 million followers worldwide.
8. Confucianism: Current Major Concentration: China, Taiwan. Beliefs: Belief in the importance of social relationships, respect for tradition and authority, and the teachings of Confucius. Demography: Confucianism is more of a philosophy than a religion, but it has had a significant impact on East Asian cultures.
9. Shinto: Current Major Concentration: Japan. Beliefs: Belief in the Kami (divine beings or spirits), and the importance of nature and purity. Demography: About 4 million followers worldwide.
10. Jainism: Current Major Concentration: India. Beliefs: Belief in non-violence, self-control, and the concept of ahimsa (non-harming). Demography: About 4 million followers worldwide.
11. Taoism: Current Major Concentration: China, Taiwan. Beliefs: Belief in the Tao (the way of the universe), and the importance of balance and harmony. Demography: About 20 million followers worldwide.
12. Zoroastrianism: Current Major Concentration: Iran, India. Beliefs: Belief in one God (Ahura Mazda), the concept of good and evil, and the teachings of Zoroaster. Demography: About 200,000 followers worldwide.
13. African Traditional Religions: Current Major Concentration: Sub-Saharan Africa. Beliefs: Belief in multiple gods and goddesses, ancestors, and the importance of community and nature. Demography: About 100 million followers worldwide.
14. Cao Dai: Current Major Concentration: Vietnam. Beliefs: Belief in a supreme being, and the teachings of the prophet, Ngo Minh Chieu. Demography: About 6 million followers worldwide.