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

ReligionApril 5, 2017

Christians remain world’s largest religious group, but they are declining in Europe

Though Christians make up nearly a third of Earth’s 7.3 billion people, the number of Christians in Europe is in decline.

ReligionApril 5, 2017

The Changing Global Religious Landscape

More babies were born to Christian mothers than to members of any other religion in recent years. Less than 20 years from now, however, the number of babies born to Muslims is expected to modestly exceed births to Christians.

HispanicMarch 29, 2017

Key findings about Puerto Rico

To mark the 100th anniversary of the U.S. government granting American citizenship to the residents of Puerto Rico, here are key facts about the territory.

ReligionMarch 21, 2017

Majority of states have all-Christian congressional delegations

The vast majority of the nation’s federal lawmakers (91%) describe themselves as Christians, compared with 71% of U.S. adults who say the same.

ReligionFebruary 27, 2017

Most white evangelicals approve of Trump travel prohibition and express concerns about extremism

While most Americans disapprove of Donald Trump’s recent refugee policy, there is a sizable divide on the issue among major religious groups.

ReligionFebruary 15, 2017

Americans Express Increasingly Warm Feelings Toward Religious Groups

Americans generally express more positive feelings toward various religious groups today than they did just a few years ago.

ReligionFebruary 7, 2017

Most refugees who enter the U.S. as religious minorities are Christians

A little over a third of the refugees admitted into the U.S. in fiscal 2016 were religious minorities in their home countries. Of those, 61% were Christians and 22% were Muslims.

ReligionJanuary 20, 2017

Almost all U.S. presidents, including Trump, have been Christians

Most of the U.S. presidents have been openly religious, with many belonging to some of the country’s most prominent Protestant denominations.

ReligionJanuary 19, 2017

6 facts about faith and the inauguration

The trappings of religion have long been part of U.S. presidential inaugurations. Here are six facts on the role faith has played in inaugurations.

ReligionJanuary 18, 2017

U.S. Catholics, non-Catholics continue to view Pope Francis favorably

In the U.S., Pope Francis remains as popular as ever, with seven-in-ten Americans saying their opinion of the pontiff is “very” or “mostly” favorable.