Section I. Religious Demography
The U.S. government estimates the total population at 18.2 million (midyear 2020 estimate). According to ONAR’s 2018 estimates, 60 percent of the population self-identifies as Roman Catholic and an estimated 18 percent identifies as “evangelical,” a term used in the country to refer to non-Catholic Christian groups, including Episcopalians, but not The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), Jehovah’s Witnesses, Orthodox Churches (including the Armenian, Greek, Persian, Serbian, and Ukrainian communities), and Seventh-day Adventists. In the most recent census that included religious affiliation, conducted in 2002, Baha’is, Buddhists, Jews, Muslims, Jehovah’s Witnesses, Seventh-day Adventists, and members of the Family Federation for World Peace and Unification (Unification Church), the Church of Jesus Christ, the Orthodox Churches, and other unspecified religious groups together constituted less than 5 percent of the population. An estimated 4 percent of the population identifies as atheist or agnostic, while 17 percent of the population identifies as nonreligious. According to ONAR, 9 percent of the population self-identifies as indigenous, of which approximately 30 percent identify as Catholic, 38 percent as evangelical, and 6 percent as other; the remaining 26 percent did not identify with any religion. ONAR states that many of those individuals also incorporate traditional indigenous faith practices into their worship.