How Americans identify with various faith
groups: How do people
view themselves religiously? How many change religions. How many
regard themselves as Christian? How many
couples are inter-faith?.....
Graphical state-by-state display of religious affiliation:
USA Today has a very informative graphic of religious affiliation across
the U.S. Data comes from the 2001 American Religious Identification
Survey (ARIS) by the Graduate Center of the City University of
New York. They repeat their survey about once a decade. See:
http://www.usatoday.com/graphics/news/gra/