Association of Religion Data Archives
Association of Religion Data Archives: Data Archive
A large collection of surveys, polls and other data related to religion in the United States and around the world. It includes surveys of general population and also surveys taken from members of religious denominations.
Other
The Pew Forum on Religion: Muslim Americans: A Survey
A summary of a survey taken on Muslim Americans done in 2007 that reveals they are glad to be living in the United States and they are moderate in their religious beliefs.
Association of Religion Data Archives
Association of Religion Data Archives: National Profiles: Religious Data
A huge collection of religious data sorted by countries around the world. Includes maps and data related to religious freedom, the religions practiced by citizens and more. You can search by country or region.