The Future of World Religions:
Population Growth Projections, 2010-2050

As of 2010, Christianity was by far the world’s largest religion, with an estimated 2.2 billion adherents, nearly a third (31%) of all 6.9 billion people on Earth. Islam was second, with 1.6 billion adherents, or 23% of the global population.
With the exception of Buddhists, all of the world’s major religious groups are poised for at least some growth in absolute numbers in the coming decades. The global Buddhist population is expected to be fairly stable because of low fertility rates and aging populations in countries such as China, Thailand and Japan.

Worldwide, the Hindu population is projected to rise by 34%, from a little over 1 billion to nearly 1.4 billion, roughly keeping pace with overall population growth. Jews, the smallest religious group for which separate projections were made, are expected to grow 16%, from a little less than 14 million in 2010 to 16.1 million worldwide in 2050.

Muslims in 2050 are expected to make up more than 50% of the population in 51 countries, two more than in 2010, as both the Republic of Macedonia and Nigeria are projected to gain Muslim majorities. But Nigeria also will continue to have a very large Christian population. Indeed, Nigeria is projected to have the third-largest Christian population in the world by 2050, after the United States and Brazil.

These population projections were produced by the Pew Research Center as part of the Pew-Templeton Global Religious Futures project, which analyzes religious change and its impact on societies around the world. Funding for the Global Religious Futures project comes from The Pew Charitable Trusts and the John Templeton Foundation.

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