Nearly 1 in 4 People Worldwide Are Muslim
The global Muslim population stands at 1.57 billion, meaning that nearly 1 in 4 people in the world practice Islam, according to a report Wednesday billed as the most comprehensive of its kind.
The Pew Forum on Religion and Public Life report provides a precise number for a population whose size has long has been subject to guesswork, with estimates ranging anywhere from 1 billion to 1.8 billion.
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More than 300 million Muslims, or one-fifth of the world’s Muslim population, live in countries where Islam is not the majority religion. These minority Muslim populations are often quite large.
India, for example, has the third-largest population of Muslims worldwide. China has more Muslims than Syria, while Russia is home to more Muslims than Jordan and Libya combined.
Of the total Muslim population, 10-13% are Shia Muslims and 87-90% are Sunni Muslims. Most Shias (between 68% and 80%) live in just four countries: Iran, Pakistan, India and Iraq.
These are some of the key findings of Mapping the Global Muslim Population: A Report on the Size and Distribution of the World’s Muslim Population, a new study by the Pew Research Center’s Forum on Religion & Public Life. The report offers the most up-to-date and fully sourced estimates of the size and distribution of the worldwide Muslim population, including sectarian identity.
Previously published estimates of the size of the global Muslim population have ranged widely, from 1 billion to 1.8 billion.2 But these commonly quoted estimates often have appeared without citations to specific sources or explanations of how the figures were generated.
The Pew Forum report is based on the best available data for 232 countries and territories.
[…]These findings on the world Muslim population lay the foundation for a forthcoming study by the Pew Forum, scheduled to be released in 2010, that will estimate growth rates among Muslim populations worldwide and project Muslim populations into the future. The Pew Forum plans to launch a similar study of global Christianity in 2010 as well. The Pew Forum also plans to conduct in-depth public opinion surveys on the intersection of religion and public life around the world, starting with a 19-country survey of sub-Saharan Africa scheduled to be released later this year. These forthcoming studies are part of a larger effort – the Global Religious Futures Project, jointly funded by The Pew Charitable Trusts and the John Templeton Foundation – that aims to increase people’s understanding of religion around the world.
• Download the full report 
(62 pages, 10MB)