Biggest Religion In The World 2025. What are the religious composition of the world's population? The buddhist population will remain flat and fall from 7.2 percent to 5.2 percent of the world's total population.

The buddhist population will remain flat and fall from 7.2 percent to 5.2 percent of the world’s total population. The demographic projections within this report are based on the current size and geographic distribution of the world’s major religions, as well as age differences,.