Married African-American families have higher incomes
Among African-Americans, the median family income of single men is one-half that of the median married-family income; for single women, it’s two-fifths. Even among single-income married African-American families, the median family income is still higher than that of unmarried individuals.
Median income of African-American families, by family type, in 2010 dollars

Source: U.S. Census Bureau, Current Population Survey, 2011.