Top 10 countries with highest percentage of Muslims

Islam is the fastest growing religion in the world, with Muslims constituting a sizeable demographic force.

The number of Muslims grew 21% between 2010 and 2020, from 1.7 billion to two billion. Muslims grew twice as fast as the rest of the world’s population. which swelled 10% during the last decade.

Muslims, meanwhile, grew from 24% to 26% as a share of the global population. But where do they reside?

Around 240 million Muslims are based in Indonesia, as of 2020. Along with those residing in Pakistan and India, they constitute a third of Muslims worldwide. 

The top 10 countries with the largest number of Muslims, namely Indonesia, Pakistan, India, Bangladesh, Nigeria, Egypt, Iran, Turkey, Sudan and Algeria, are home to 65% of the world’s total Muslim population, equalling a combined 1.3 billion individuals, according to Pew Research Center.  

From a share of percentage, Morocco’s population is entirely Muslim, with 100% of its residents following Islam as recent as the year 2021, according to the World Population Review, citing Pew Research.  

Host to rugged mountain ranges, Afghanistan hosts a staggering Muslim population, constituting 99.7% of its resident base.  

Here’s a list of top 10 countries and territories with the highest percentage of Muslims in 2021. 

Morocco (100% Muslims)

Morocco's population of 38.4 million comprises entirely of Muslims. The African country has a diverse economy with thriving tourism and manufacturing sectors.  

Afghanistan (99.7% Muslims)

Afghanistan's population is Muslim almost without exception. The Asian country known for its ancient Silk Road routes, has a population of 44 million, making it the 36th largest country worldwide.

Somalia (99.7% Muslims)

The African country of Somalia, also known for the Horn of Africa and longest coastline in mainland Africa, has a a population of 19.7 million, of which Muslims form an overwhelming majority. 

Iran (99.5% Muslims)

The 17th largest country in the world, Iran known for its Islamic architecture has a population of 92.4 million, comprising of 99.5% Muslims. 

Tunisia (99.5% Muslims)

Tunisia has a population of 12.3 million, making it the 80th largest country in the world.

Western Sahara (99.4% Muslims)

Western Sahara has a modest population of nearly 601 thousand, making it the 172nd largest country in the world.

Iraq (99.1% Muslims)

Iraq is a country in Asia with a population of over 47 million, making it the 34th largest country in the world. It has a staggering Muslim presence, making up 99.1% of its resident base. 

Yemen (99.1% Muslims)

Yemen has a population of 41.8 million, making it the 37th largest country in the world. 

Mauritania (99.1% Muslims)

The African country of Mauritania has a population of 5.3 million, with Muslims forming a formidable majority. 

Mayotte (99.1% Muslims)

Mayotte, which is made up of one main island, one smaller island, and islets, has a population of 270,372.