The data, which has an error margin of less than 1 percentage point, finds that the majority of only three religious demographics — white evangelical Protestants, Mormons and Jehovah's Witnesses — said they oppose "allowing gays and lesbians to marry legally."

While 58 percent of Americans said they support same-sex marriage, 61 percent of white evangelical Protestants, 55 percent of Mormons and 53 percent of Jehovah's Witnesses signaled that they oppose the legalization of same-sex marriage, which happened in 2015 when the U.S. Supreme Court ruled that states cannot ban same-sex marriage, making it legal nationwide. ...