Why the U.S. Census Does Not Ask about Religion
The U.S. Census Bureau has not asked questions about religion since the 1950s, but the federal government did gather some information about religion for about a century before that.
Religion and Society 
01.26.10
05.22.07
Muslim Americans: Middle Class and Mostly Mainstream
The first-ever, nationwide, random sample survey of Muslim Americans finds them to be largely assimilated, happy with their lives, and moderate with respect to many of the issues that have divided Muslims and Westerners around the world.
