Fast Growing Religion In The World 2025. Islam is growing faster than any other religion, according to a study by the pew research center. It’s no secret that christianity is the world’s largest religion, but where is it growing the fastest?

The projections take into account the current size and geographic distribution of the world’s major religions, age differences, fertility and mortality rates, international migration and patterns in conversion. As a result, more muslims are likely to live in nigeria than.