Where can I find the detailed census figures about religion?
The U.S. Census doesn’t gather information about religion. Consult Churches and Church Membership in the United States, 1990: an Enumeration by Region, State, and County, Based on Data Reported for 133 Church Groupings in the UCF Library’s Reference Collection [REF BR526.C48 1992]. See also the New Historical Atlas of Religion in America [REF G1201.E4.N4 2001]. Some information may be found in the population section of the Statistical Abstract of the U.S. or in the Yearbook of American & Canadian Churches [REF BR513.Y4].