1 in 4. that is a lot. For instance, Germany has more Muslims than Lebanon, China has more Muslims than Syria, Russia has more Muslims than Jordan and Libya combined, and Ethiopia has nearly as many Muslims as Afghanistan. 
85% of the world's Muslims are Sunni, and 15% are Shī‘ī,
Shiites represent between 10 and 13 percent of the Muslim population, in line with or slightly lower than other studies. As much as 80 percent of the world's Shiite population lives in four countries: Iran, Pakistan, India and Iraq.
The report provides further evidence that while the heart of Islam might beat in the Middle East, its greatest numbers lie in Asia: More than 60 percent of the world's Muslims live in Asia.
About 20 percent live in the Middle East and North Africa, 15 percent live in Sub-Saharan Africa, 2.4 percent are in Europe and 0.3 percent are in the Americas. While the Middle East and North Africa have fewer Muslims overall than Asia, the region easily claims the most Muslim-majority countries.
about 317 million Muslims — or one-fifth of the world's Muslim population — living in countries where Islam is not the majority religion.
About three-quarters of Muslims living as minorities are concentrated in five countries: India (161 million), Ethiopia (28 million), China (22 million), Russia (16 million) and Tanzania (13 million).
India is the third-largest Muslim population of any nation — yet Muslims account for just 13 percent of India's population.
• Two-thirds of all Muslims live in 10 countries. Six are in Asia (Indonesia, Pakistan, India, Bangladesh, Iran and Turkey), three are in North Africa (Egypt, Algeria and Morocco) and one is in sub-Saharan Africa (Nigeria).
• Indonesia has the world's largest Muslim population (203 million, or 13 percent of the world's total).
In China, the highest concentrations of Muslims were in western provinces.
Europe is home to about 38 million Muslims, or about five percent of its population. Germany appears to have more than 4 million Muslims.
Of roughly 4.6 million Muslims in the Americas, more than half live in the United States although they only make up 0.8 percent of the population there. About 700,000 people in Canada are Muslim, or about 2 percent of the total population.
A future Pew Forum project, scheduled to be released in 2010, will build on the report's data to estimate growth rates among Muslim populations and project future trends.
