Indonesia is The Largest Muslim Country in The World

Adherents of Islam constitute the world's second largest religious group. According to a study in 2020, Islam has 1.9 billion adherents, making up about 24.7% of the world population. Most Muslims are either of two denominations: Sunni (87–90%, roughly 1.7 billion people)^[4] or Shia (10–13%, roughly 180–230 million people). Islam is the majority religion in several subregions: East Asia, South Asia, North Africa, the Sahel, and the Middle East. The diverse Asia-Pacific region contains the highest number of Muslims in the world, easily surpassing the combined Middle East and North Africa.

World Muslim population by percentage (2014 estimate)

South Asia contains the largest population of Muslims in the world. One-third of Muslims are of South Asian origin. Islam is the dominant religion in the Maldives, Afghanistan, Pakistan, and Bangladesh. India is the country with the largest Muslim population outside Muslim-majority countries with more than 200 million adherents.

The various Hamito-Semitic, Arab, Berber, Turkic, and Iranic countries of the greater Middle East-North Africa (MENA) region, where Islam is the dominant religion in every country other than Israel, host 23% of the world's Muslims.

The country with the single largest population of Muslims is Indonesia in Southeast Asia,

which on its own hosts 13% of the world's Muslims. Together, the Muslims in the countries of Southeast Asia constitute the world's third-largest population of Muslims. In the countries of the Malay Archipelago, Muslims are majorities in each country other than the Philippines, Singapore, and East Timor.

About 15% of Muslims reside in Sub-Saharan Africa,^{[page needed]} and sizeable Muslim communities are also found in the Americas, China, and Europe.

Western Europe hosts many Muslim immigrant communities where Islam is the second-largest religion after Christianity, where it represents 6% of the total population or 24 million people.

According to the Pew Research Center in 2010, there were 50 Muslim-majority countries. Around 62% of the world's Muslims live in the Asia-Pacific region (from Turkey to Indonesia), with over one billion adherents. The largest Muslim population in a country is in Indonesia, a country home to 12.7% of the world's Muslims, followed by Pakistan (11.1%), India (10.9%) and Bangladesh (9.2%). About 20% of Muslims live in the Arab world. In the Middle East, the non-Arab countries of Iran and Turkey are the largest Muslim-majority countries, while Egypt and Nigeria in Africa have the same status. The study found more Muslims in the United Kingdom than in Lebanon and more in China than in Syria. The Indian state of Uttar Pradesh has more Muslims than any other Muslim-majority countries except Indonesia, Pakistan, Bangladesh, Egypt, Iran and Turkey