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

Fact Tank Jun. 16, 2015

Ideological divide over global warming as wide as ever

Pope Francis will publish an encyclical addressing environmental issues and climate change this Thursday, a subject that continues to deeply divide Americans, including Catholics, along partisan and ideological lines.

Religion Jun. 16, 2015

Catholics Divided Over Global Warming

A solid majority of U.S. Catholics believe that Earth is warming. But climate change is a highly politicized issue that sharply divides American Catholics, like the U.S. public as a whole, mainly along political party lines.

Fact Tank Jun. 9, 2015

A look at popes and their encyclicals

Popes have written encyclicals on an array of topics, ranging from the nature of work to the virginity of Jesus’ mother, Mary.

Fact Tank May. 27, 2015

Q&A: A look at what’s driving the changes seen in our Religious Landscape Study

Fact Tank sat down with David Campbell, a professor of political science at the University of Notre Dame, to explore what the new findings mean.

Fact Tank May. 26, 2015

Lesbian, gay and bisexual Americans differ from general public in their religious affiliations

A majority of LGB adults are religiously affiliated, but they are much less likely to be Christian than the general public and are more drawn to smaller, non-Christian denominations.

Fact Tank May. 22, 2015

Mormons more likely to marry, have more children than other U.S. religious groups

Two-thirds (66%) of U.S. Mormon adults are currently married, down slightly from 71% in 2007 – but still high compared with current rates among Christians overall (52%) and U.S. adults overall (48%).

Fact Tank May. 19, 2015

Growing share of U.S. immigrants have no religious affiliation

One-in-five immigrants identified themselves as unaffiliated in 2014, an increase of 4 percentage points from the 16% who said so in 2007.

Fact Tank May. 18, 2015

Mainline Protestants make up shrinking number of U.S. adults

In recent years, the share of Americans who identify with mainline Protestantism has been shrinking significantly, a trend driven partly by generational change.

Fact Tank May. 15, 2015

Compared with other Christian groups, evangelicals’ dropoff is less steep

One big reason evangelical Protestants have not declined at the same rate as other major Christian groups is that they are gaining new converts at a greater rate than they are losing people who were raised in the tradition.

Fact Tank May. 12, 2015

5 key findings about the changing U.S. religious landscape

Christians are declining, both as a share of the U.S. population and in total number, while religious “nones” continue to rise.