Section I. Religious Demography
The U.S. government estimates the total population at 20.8 million (midyear 2020 estimate). According to the 2006 census, 61 percent of the population is Muslim (predominantly Sunni), 19 percent is Roman Catholic, 4 percent belong to various Protestant groups, and 15 percent maintain exclusively indigenous beliefs. Less than one percent is atheist or belongs to other religious groups. Statistics on religious affiliation are approximate because Muslims and Christians often adhere simultaneously to some aspects of traditional or animist religious beliefs.
Muslims reside largely in the northern, eastern, and western border regions, while Christians are concentrated in the center of the country. Traditional and animist religious beliefs are practiced throughout the country, especially in rural communities. The capital has a mixed Muslim and Christian population.