Islam is the fastest-growing religion and is set to overcome Christianity as the world's most popular faith by the year 2100, according to the Pew Research Center.
The world's two largest religions will be near parity by 2050.
There were an estimated 1.6 billion Muslims at the same date.
One of the key areas of growth will be in India, which has the world's fastest growing Muslim population. The 34 percent of Islam believers are made up of young people under the age of 15. In fact, Muslims are the only major religious group projected to increase faster than the world's population as a whole, the think tank said.
In 2010, there were around 1.6 billion Muslims in the world, the report reveals, noting that the figure amounted to roughly 23 percent of the world's population.
A large majority of the world's Muslims live in Asia rather than in the Middle East and North Africa.
The research sees that the Muslims will make up for the 10 percent of the population in Europe.
Islam is now the world's fastest growing religion and Muslims could exceed the number of Christians by the end of this century. Christians surpass that average with a rate of 2.7, but Muslims soar beyond it with 3.1 children per mother. First, Muslims have more children than members of other religious groups.
India has been projected to have the largest Muslim population by 2050, according to a report by the Pew research centre. While such groups will grow in North America and Europe, globally they will decline from 16.4 per cent of the population to 13.2 per cent by 2050.
The median age of Muslims in 2010 was 23, compared to 30 for all non-Muslims.
Islam's rise is partly down to the high fertility rates of Muslim women, alongside the religion's younger followers, the research showed.
"The country is becoming less religious as a whole, and it's happening across the board", said Alan Cooperman, director of religion research for the Pew Research Center, about the USA, reports The Washington Post.
There is a clear partisan political split on the perception of Muslims in the United States as well, with Democrats tending to give a more positive rating of Muslims and Islam, as opposed to Republicans, who take a more predominantly negative view of the faith.