Is Islam Really the Fastest-Growing Religion? Here's What the Numbers Say — And What It Means for Raising the Next Generation
Someone asked me this exact question at a family gathering not long ago — half out of curiosity, half wanting to settle an argument they'd had earlier that week. "Is Islam actually the fastest-growing religion, or is that just something people repeat without checking?" So I went and looked into it properly, and it turns out the claim holds up — but the reason behind it isn't quite what most people assume. What the Research Actually Shows A major Pew Research Center study , released in 2025, found that between 2010 and 2020 the global Muslim population grew by 347 million people — more than every other religion on Earth combined during that same decade. That growth pushed Islam's share of the world's population from roughly 23.9% up to 25.6%, while Christianity, still the world's largest religion by total numbers, actually saw its overall share decline slightly. So yes, by the numbers, Islam genuinely is growing faster than any other major world rel...