In the United States, the population projections show the number of Muslims more than doubling over the next two decades, rising from 2.6 million in 2010 to 6.2 million in 2030, in large part because of immigration and higher-than-average fertility among Muslims.
The Muslim share of the U.S. population (adults and children) is projected to grow from 0.8% in 2010 to 1.7% in 2030, making Muslims roughly as numerous as Jews or Episcopalians are in the United States today.
Although several European countries will have substantially higher percentages of Muslims, the United States is projected to have a larger number of Muslims by 2030 than any European country other than Russia and France.
via Pew Research
Link posted at 11:45