An extremely comprehensive survey from the Pew Centre shows the religious composition and trends in American culture. The USA is predominantly (78.4%) Christian, which breaks down into 51% Protestant and 24% Catholic.
Of the remainder, 5% belong to other faiths and 16% say they do not have any religious affiliation.
The report also compares religion by region and demographic, and examines the number of people who change religion or who are married to a partner with a different faith. This article by the Economist also comments on the survey.
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How Christmas is celebrated around the world
The year of America: does the rest of the world stereotype America?
