Most Popular Religion in the World


Ye have indeed in the Messenger of Allah a beautiful pattern (of conduct) for any one whose hope is in Allah and the Final Day, and who engages much in the Praise of Allah. al-Qur’an 33:21

  • Islam is the second most popular religion in the world. There were about 1.6 billion Muslims in the world in 2010, according to Pew Research. Muslims constituted about 23% of all people on Earth. The religion is currently in a period of rapid growth, and is expected to reach 2.8 billion by 2050, when it will probably approximately equal the number of Christians.
  • Estimates of the number of Muslim adults in the U.S. have ranged from 1 to 7 million. The former estimate is based on polls and assume that almost all adults who identify as Muslims are willing to respond openly to public opinion pollsters. The latter estimate comes from Muslim groups in the U.S. who assume that immigrants to the U.S. from Muslim countries were all Muslims and have remained so to the present time.
  • A Pew Forum on Religion & Public Life report in 2015 concluded that the U.S. population of Muslim adults is 2.6 million — 0.6% of the total population. This places Islam as the third most popular organized religion in the U.S. after Christianity (70.6%) and Judaism (0.9%).