The U.S. government estimates the total population at 9.7 million (July 2018 estimate).  Approximately 11 percent of the population are citizens, of whom more than 85 percent are Sunni Muslims, according to media reports.  The vast majority of the remainder are Shia Muslims, who are concentrated in the Emirates of Dubai and Sharjah.

Of the estimated 89 percent of residents who are noncitizens, the majority come from South and Southeast Asia.  Although no official statistics are available for what percentage of the noncitizen population is Muslim or the breakdown between Sunni and Shia Muslims among noncitizen residents, media estimates suggest less than 20 percent of the noncitizen Muslim population is Shia.

Of the total population (both citizen and noncitizen), the 2005 census, the most recent, found 76 percent to be Muslim, 9 percent Christian, and 15 percent from other religious groups comprising mainly Hindus and Buddhists, and also including Parsis, Baha’is, Druze, Sikhs, and Jews.  Ahmadi Muslims, Ismaili Muslims, and Dawoodi Bohra Muslims together constitute less than 5 percent of the total population and are almost entirely noncitizens.  The Pew Research Center estimated that in 2010, 76.9 percent of the total population was Muslim, 12.6 percent Christian, 6.6 percent Hindu, 2 percent Buddhist, with the remaining belonging to other faith traditions.