The world's faithful account for 83% of the global population; the great majority of these fall under twelve classical religions–Baha'i, Buddhism, Christianity, Confucianism, Hinduism, Islam, Jainism, Judaism, Shinto, Sikhism, Taoism, and Zoroastrianism.
World religions today
Currently, the world's largest religion is Christianity, followed by Islam, Hinduism, and then Buddhism.
Judaism, in spite of its significance as the foundational Abrahamic religion and the worldwide recognition of its beliefs, is followed by only 13 million people.