World Population – World Religions
| Religion | Adherents |
| Christianity | 2,170,000,000 |
| Islam | 1,340,000,000 |
| Hinduism | 900,000,000 |
| Buddhism | 400,000,000 |
| Atheism | 150,000,000 |
| Sikhism | 26,000,000 |
| Judaism | 15,000,000 |
| Baha'i | 8,000,000 |
| Confucianism | 6,000,000 |
| Jainism | 5,000,000 |
