On the eve of Christmas 2015, a review of over 174,000 interviews conducted in 2015 shows that three-quarters of American adults identify with a Christian religion are down from 80% eight years ago.
About 5% of Americans identify with a non-Christian religion, while 20% have no formal religious identification, which is up five percentage points since 2008.
|The Pew Research Center calls this the "Rise of the Nones"|
These results are based on interviews conducted each year since 2008 as part of Gallup Daily tracking. The general trends in the data over this eight-year period are clear: As the percentage of Americans identifying with a Christian religion has decreased, the percentage with no formal religious identification has increased.
The small percentage of Americans who identify with a non-Christian religion has been essentially constant over this time period.