While the U.S. is generally considered a highly religious nation, African-Americans are markedly more religious on a variety of measures than the U.S. population as a whole, including level of affiliation with a religion, attendance at religious services, frequency of prayer and religion's importance in life.
Compared with other racial and ethnic groups, African-Americans are among the most likely to report a formal religious affiliation, with fully 87% of African-Americans describing themselves as belonging to one religious group or another, according to the U.S. Religious Landscape Survey, conducted in 2007 by the Pew Research Center's Forum on Religion & Public Life. Latinos also report affiliating with a religion at a similarly high rate of 85%; among the public overall, 83% are affiliated with a religion.
Read the full report A Religious Portrait of African-Americans on the Pew Forum on Religion & Public Life's Web site.