where does islam rank in size on the list of the world’s religions
Islam by country Adherents of Islam constitute the world's second largest religious group. According to a study in 2015, Islam has 1.8 billion adherents, making up about 24% of the world population.[1] Most Muslims are either of two denominations: Sunni (80-90%, roughly 1.5 billion people)[2] or Shia (10â€“20%, roughly 170-340 million people).[3] Islam is the dominant religion in the Central Asia, Indonesia, Middle East, South Asia, North Africa, the Sahel[4][5][6][7] and some other parts of Asia.[8] The diverse Asia-Pacific region contains the highest number of Muslims in the world, easily surpassing the Middle East and North Africa.[9]
Importance of religion by country In terms of demographics, India ranks as the country with the largest number of highly religious people in the world, with over 1.05 billion believers (estimated). China, although its number is less than a fifth of its total population (~18-19%), ranks second, with an estimated 240-260 million believers, followed by Indonesia (~235 million), the United States (~205 million), Pakistan (~175 million), Brazil (~168 million), Nigeria (~163 million) and Bangladesh (~135 million).[3][not in citation given][4][not in citation given][5][not in citation given][6][not in citation given]