Singapore ranks as the world’s most religiously diverse country, according to a Feb. 2026 report by Pew Research Centre under the Pew Templeton Global Religious Futures project. The study assessed 201 countries using a Religious Diversity Index, which measures how evenly populations are spread across seven faith categories.
Singapore scored 9.3 out of 10, the highest in the world. Buddhists form 31% of its population. Religiously unaffiliated residents account for 20%. Christians make up 19%. Muslims represent 16%. Hindus form 5%, while 9% follow other religions. No group holds a majority.
Globally, Christians remain the largest religious group at 2.3 billion, or 28.8% of the population. Muslims are the fastest growing group. Their numbers increased by 347 million between 2010 and 2020, raising their global share to 25.6%. Hindus grew by 126 million to reach 1.2 billion and held steady at 14.9%.
People with no religious affiliation now account for 24.2% of the world. Buddhists declined by 19 million to 324 million, becoming the only major faith to shrink in absolute numbers.
The Asia Pacific region ranks as the most diverse overall with an index score of 8.7. In contrast, Yemen, Afghanistan and Somalia rank among the least diverse, with Muslims forming at least 99% of their populations.
The findings draw on more than 2,700 censuses and surveys and cover countries representing 99.98% of the global population in 2020.