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Religious Affiliation

Individuals identify with particular religious traditions for theological, doctrinal, cultural or other reasons. Explore Pew Forum publications—including public opinion polls, demographic reports, research studies, event transcripts and interviews—about various faiths and their members.

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The Global Religious Landscape
A country-by-country analysis of data from more than 2,500 censuses, surveys and population registers finds that 84% of adults and children around the globe are religiously affiliated. The study also finds that the median age of two major groups – Muslims (23 years) and Hindus (26) – is younger than the world’s overall population (28), while Jews have the highest median age (36).

 

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ANALYSIS April 23, 2013
Concerns About Religious Extremism in Boston Bombings Suspects' Homelands
A new Pew Research Center survey finds high levels of concern about religious extremism among Muslims living in the North Caucasus area of Russia and the neighboring Central Asian countries of Kyrgyzstan and Kazakhstan. It also finds that most Muslims in the region reject violence against civilians.
ANALYSIS April 8, 2013
Applying God’s Law: Religious Courts and Mediation in the U.S.
Across the U.S., religious courts operate on a routine, everyday basis. How do some of the country's major Christian traditions and other religions - including Islam, Judaism, Buddhism and Hinduism - decide internal matters and apply their religious laws?
ANALYSIS March 18, 2013
Latin America’s Catholics in the Spotlight as Pope Francis is Installed
Latin America's share of the global Catholic population has increased over the past century, according to Pew Research Center estimates, but the portion of the region’s population that is Catholic has declined.
ANALYSIS March 13, 2013
Resources on Catholicism and the Pope
The Pew Forum on Religion & Public Life has a variety of resources on Catholicism and Pope Benedict XVI, including public opinion polls, research studies, event transcripts and interviews. 
ANALYSIS March 13, 2013
‘Strong’ Catholic Identity at a Four-Decade Low in U.S.
The percentage of U.S. Catholics with a strong identification with the Catholic Church was as low in 2012 as it has ever been in General Social Surveys. During the same period, the percentage of Protestants who consider themselves strong members of their faith has been rising.
ANALYSIS March 5, 2013
During Benedict’s Papacy, Religious Observance Among Catholics in Europe Remained Low but Stable
When Benedict XVI was elected pope in 2005, religious observance among Europeans had been in decline for decades, and he set out to stem the tide of secularization. How successful was he? Pew Research polls indicate that during his papacy, religious observance among Catholics in France, Germany, Spain and Italy remained low but fairly stable.
ANALYSIS February 13, 2013
The Global Catholic Population
Over the past century, the number of Catholics worldwide has more than tripled. But the world’s overall population also has risen rapidly from 1910 to 2010. As a result, Catholics have made up a remarkably stable share of all people on Earth, though their geographic distribution has changed substantially.
ANALYSIS January 16, 2013
Religious Groups' Official Positions on Abortion
A breakdown of 17 major religious groups' views on the issue of abortion.  
ANALYSIS December 18, 2012
The Global Religious Landscape
A country-by-country analysis of data from more than 2,500 censuses, surveys and population registers finds that 84% of adults and children around the globe are religiously affiliated. The study also finds that the median age of two major groups – Muslims (23 years) and Hindus (26) – is younger than the world’s overall population (28), while Jews have the highest median age (36).
ANALYSIS December 7, 2012
Religious Groups' Official Positions on Same-Sex Marriage
In recent years, same-sex marriage has been a contentious subject within many religious groups in the U.S. Here is an overview of where 16 religious groups stand on this issue.  
ANALYSIS October 11, 2012
The Catholic “Swing” Vote
Catholics are often identified as a major "swing" voting group in American politics. A new analysis shows that the only group of Catholics that has been divided in recent elections is white Catholics who identify as political moderates.
ANALYSIS March 8, 2012
Faith on the Move
This study focuses on the religious affiliation of international migrants, examining patterns of migration among seven major groups: Christians, Muslims, Hindus, Buddhists, Jews, adherents of other religions and the religiously unaffiliated.
ANALYSIS February 23, 2012
Religion in the News: Islam and Politics Dominate Religion Coverage in 2011
The biggest religion stories of 2011 involved tensions over Islam and questions about faith in presidential politics, especially Mormonism, according to an annual review of religion in the news.
ANALYSIS December 19, 2011
Global Christianity
A comprehensive demographic study finds that there are 2.18 billion Christians of all ages around the world, representing nearly a third of the estimated 2010 global population of 6.9 billion. Christians are also geographically widespread, and no single region can indisputably claim to be the center of global Christianity.
ANALYSIS November 21, 2011
Lobbying for the Faithful
A new report gives a brief history of organized religious advocacy in Washington, D.C., and examines the major characteristics of religion-related advocacy. A related online directory includes profiles of 216 groups currently or recently active in the nation’s capital.
ANALYSIS February 24, 2011
Religion in the News: Islam Was No. 1 Topic in 2010
 Events and controversies related to Islam dominated U.S. press coverage of religion in 2010, bumping the Catholic Church from the top spot, according to a new study by the Pew Research Center’s Project for Excellence in Journalism and the Pew Forum on Religion & Public Life.
ANALYSIS January 27, 2011
The Future of the Global Muslim Population
A new Pew Forum report on the size, distribution and growth of the global Muslim population finds that the world’s Muslim population is expected to increase by about 35% in the next 20 years, but it is expected to grow at a slower pace in the next two decades than it did in the previous two decades.
ANALYSIS January 5, 2011
Faith on the Hill
The political overhaul of the U.S. Congress after the 2010 elections appears to have had little effect on the religious composition of the legislative body, which is similar to the religious makeup of the previous Congress and of the nation, according to an analysis by the Pew Forum.
ANALYSIS September 15, 2010
Muslim Networks and Movements in Western Europe
To help provide a better understanding of how Muslim movements and networks seek to influence the views and daily lives of Muslims in Western Europe, the Pew Forum has produced profiles of some of the oldest, largest and most influential groups – from the Muslim Brotherhood to mystical Sufi orders and networks of religious scholars.
ANALYSIS June 11, 2010
The Pope Meets the Press: Media Coverage of the Clergy Abuse Scandal
Newspaper coverage of the Catholic clergy sexual abuse scandal grew more intense this spring than at any time since 2002, and European newspapers devoted even more ink to the story than American papers did, according to a new study by the Pew Research Center.
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