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World religions


Islam: The second largest
world religion...and growing.

Islamic terms About Islam:

  • 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. 1

  • 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. 2

    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%). 3

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Symbol of Islam 4 Topics included in this section:

In addition to the above, we have short passages on:

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The "Chat Now" button below links to the Da'wah service.

"Da'wah"is an Arabic word that means an invitation -- in this case an invitation to consider Islam.
They offer a free chat service to non-Muslims who want to learn about Islam. They are active 24/7.
Their service is staffed with over 80 professional Duát and over 300 students and volunteers.
They provide one-on-one dialogue in ten languages.


If you engage in a chat with, we would appreciate your comments on their service:
E-mail us about errors, etc. 

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References used:

The following information sources were used to prepare and update the above essay. The hyperlinks are not necessarily still active today.

  1. Michael Lipka & Conrad HacketT, "Why Muslims are the world's fastest-growing religious group," Pew Research Center, 2015-APR-23, at:
  2. The estimate of 1.1 million Muslim in the U.S. was derived from the American Religious Identification Survey (ARIS) of 2001. It was based on a telephone survey. See: The seven million estimate was obtained from the Council on American-Islamic Relations (CAIR) web site. It was based on the number of immigrants from Islamic countries. See:
  3. "Christians Decline Sharply as Share of Population; Unaffiliated and Other Faiths Continue to Grow," Pew Research Center, 2015-MAY-12, at:
  4. "Symbols of Islam -- Allah," Wikipedia, as on 2015-OCT-24, at:

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Copyright © 1995 to 2016 by Ontario Consultants on Religious Tolerance
Last update: 2016-JAN-08
Author: B. A. Robinson

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