Pew Research Center reports and data on the world’s fastest growing religious group.

ReligionJan 6, 2016

A new estimate of the U.S. Muslim population

Pew Research Center estimates that there were about 3.3 million Muslims of all ages living in the United States in 2015. This means that Muslims made up about 1% of the total U.S. population.

GlobalDec 31, 2015

Your favorite Fact Tank data in 2015

From Millennials in the workforce to religion in America, our most popular posts told important stories about trends shaping our world.

GlobalDec 22, 2015

15 striking findings from 2015

From trust in government to views of climate change, here are some of Pew Research Center’s most memorable findings of the year.

U.S. PoliticsDec 15, 2015

5 facts about Republicans and national security

When GOP presidential candidates meet in Las Vegas tonight for their sixth debate, terrorism, foreign policy and national security are expected to be major topics.

GlobalDec 7, 2015

Muslims and Islam: Key findings in the U.S. and around the world

Muslims are the fastest-growing religious group in the world. Here are some questions and answers about their public opinions and demographics.

GlobalNov 19, 2015

U.S. public seldom has welcomed refugees into country

Public opinion data going back to the 1930s shows that generally speaking, Americans oppose large numbers of refugees entering the country.

GlobalNov 17, 2015

In nations with significant Muslim populations, much disdain for ISIS

Most people in the countries we surveyed – including 11 countries with significant Muslim populations – had negative views of the Islamic State extremist group as of spring.

GlobalNov 17, 2015

5 facts about the Muslim population in Europe

The Muslim share of Europe’s total population has been increasing steadily, growing from 4% in 1990 to 6% in 2010.

ReligionNov 3, 2015

U.S. Public Becoming Less Religious

There has been a modest drop in overall rates of belief in God and participation in religious practices. But religiously affiliated Americans are as observant as before.

ReligionJul 27, 2015

The most and least racially diverse U.S. religious groups

The nation’s population is growing more racially and ethnically diverse – and so are many of its religious groups, both at the congregational level and among broader Christian traditions.