The U.S. government estimates the total population at 7 million (midyear 2019 estimate). According to the 2011 census, approximately 85 percent of the population is Orthodox Christian, 5 percent Roman Catholic, 3 percent Sunni Muslim, and 1 percent Protestant. The remaining 6 percent includes Jews, Buddhists, members of the International Society of Krishna Consciousness, members of other religious groups, agnostics, atheists, and individuals without a declared religious affiliation. The vast majority of the population that identifies as Orthodox Christian are members of the Serbian Orthodox Church (SOC), a category not specifically listed in the census. Adherents of the Macedonian, Montenegrin, Romanian, and other Orthodox Churches may be included in the numbers of “Orthodox Christians” or in the “other Christian” category that is part of the remaining 6 percent, depending on how they self-identify.

Catholics are predominantly ethnic Hungarians and Croats residing in Vojvodina Province. Muslims include Bosniaks (Slavic Muslims) in the southwest Sandzak region, ethnic Albanians in the south, and Roma located throughout the country.