But Islam — the world’s fastest-growing major religion — increased its share of the world population, as did the religiously unaffiliated, the Pew Research Center found in a report released Monday.

The increase in the number of people with no religious affiliation is significantly influenced by the departure from Christian churches.

A new Pew Research Center report shows that although Christianity continues to be the world s largest religious group, its ...

Islam is the fastest-growing religion in the world, with the Muslim population growing by 347 million in 10 years between ...

New research shows Christians are the largest faith group worldwide, with 2.3 billion adherents. The largest number– more ...

The 10 countries with the largest numbers of Christians are home to a combined 1.1 billion, or 47% of the world's Christians.

A recent Pew Research Center report reveals that while most major religious groups expanded between 2010 and 2020, Christianity's global share decline ...