Islam. Islam is the world's second-largest religion. People that practice Islam are known as Muslims.
Globally, Muslims make up the second largest religious group, with 1.8 billion people, or 24% of the world's population, followed by religious “nones” (16%), Hindus (15%) and Buddhists (7%). Adherents of folk religions, Jews and members of other religions make up smaller shares of the world's people.
