Islam is the third largest religion in the United States after Christianity and Judaism.[1] According to a 2010 study, it is followed by 0.9% of the population, compared with 70.6% who follow Christianity, 22.8% unaffiliated, 1.9% Judaism, 0.7% Buddhism, and 0.7% Hinduism.[1][2] A 2017 study estimated that 3.45 million Muslims were living in the United States, about 1.1% of the total U.S. population.[3]