According to the survey, most U.S. adults — 81 percent — believe in God. But while that figure seems high, it is actually the lowest percentage ever reported in this survey. Up until 2011, over 90 percent said they believed in God, but the number has continued to drop, now down eight points from the 89 percent who expressed belief in God in 2016. The previous low was set in 2014, when 86 percent said they believed in God.