Protestants Shrinking, 'Unbranded' Christianity Growing
Seven in 10 Americans are very or moderately religious. Looking at demographic trends, Frank Newport, editor in chief for Gallup, predicts that Americans will become even more religious, on average, in the future.
In surveys conducted this year by Gallup, 40 percent of Americans can be categorized as "very religious," while 29 percent are "moderately religious" and 31 percent are nonreligious. Religiosity is measured by frequency of attendance at worship services and the importance of religion in the respondents' daily life. The sample of 326,721 adults has a margin of error of plus or minus one percentage point.