The group's 2011 Equality Index stands at 71.5%, compared to a revised index last year of 72.1%, the league said as it released its annual report, called The State of Black America.
An equality index of less than 100% suggests blacks are doing worse relative to whites, while an index greater than 100% suggests blacks are doing better.
The league attributed the 2011 drop to a decline in the economics index, driven by housing and wealth factors, and to a decline in the health index, driven by children's health.
Economics and social justice continue to be the areas in which blacks trail whites the most, with ratings of 56.9% and 58% respectively. Those are followed by health at 75% and education at 78.9%.
