U.S. Religious Knowledge Survey | Pew Research Center's Religion & Public Life Project
Footnotes 1 The Pew Forum’s 2007 U.S. Religious Landscape Survey estimated that Jews and Mormons each make up about 1.7% of the U.S. public, while atheists and agnostics combined account for about 4% of the U.S. population. Atheists and agnostics are ......