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.

The U.S. government estimates the total population at 16.9 million (midyear 2020 estimate). According to Latinobarometro’s 2018 public opinion survey, approximately 92 percent of Ecuadorian respondents have a specific religious affiliation or belief: 74.8 percent identify as Catholic; 15.2 percent as evangelical; and 1.2 percent as Jehovah’s Witnesses. Approximately 1.4 percent identify as members of other specific religious groups, including Seventh-day Adventists, The Church of Jesus Christ of Latter-day Saints (Church of Jesus Christ), Jews, and other evangelical and nonevangelical Protestants. Of the remaining respondents, 0.8 identify as atheists, while 6.1 percent have no religion.

Some groups, particularly those in the Amazon region, combine indigenous beliefs with Catholicism or evangelical Protestantism. Pentecostals draw much of their membership from indigenous persons in the highland provinces. There are Jehovah’s Witnesses throughout the country, with the highest concentrations in coastal areas. Buddhist, Church of Jesus Christ, Jewish, and Muslim populations are primarily concentrated in large urban areas, particularly Quito, Guayaquil, and Cuenca. Other religious groups include Anglicans, Baha’is, Episcopalians, the Family Federation for World Peace and Unification (Unification Church), Greek Orthodox-affiliated Orthodox Church of Ecuador and Latin America, Hindus, followers of Inti (the traditional Inca sun god), and practitioners of Santeria (primarily resident Cubans). Estimates of the number of followers of these groups are not available.