Razib Khan retweeted an invitation to join a live chat on how blacks don't do atheism. That made me wonder exactly what percent of American blacks don't believe in the existence of God. According to the GSS sample of 2,017 blacks, the 95% confidence interval is from 1.4 to 2.7%. For 11,866 whites, the interval is 2.4 to 3.0%. Since the two intervals overlap, there is no statistically significant racial difference.
UPDATE: Reader DR shows my error in the comments. Whites ARE significantly more likely than blacks to not believe in existence of God.