About one in six Americans say they have no religious preference
Since the 1990s, the percentage of Americans who say they have no religion has risen dramatically. However, only 10 percent of those with no religion report being atheists and 15 percent report being agnostic. Among the remaining 75 percent, about one-half say religion plays a somewhat or very important role in their lives.
Americans who say they have no religious preference
Source: General Social Surveys, 2010.