Find how many people identify with each religious group and what percent each made up in 201 countries and territories, and by region, in 2010 and 2020.
In many places surveyed, 20% or more of all adults have left their childhood religious group. Christianity and Buddhism have had especially large losses.
The globe’s 280 million immigrants shape countries’ religious composition. Christians make up the largest share, but Jews are most likely to have migrated.