We utilized data from a multi-institutional longitudinal study to investigate the association between diversity-related coursework and moral development among students over 4 years of college. Our findings parallel the prior research, which support the positive effects of diversity on college students, by offering new evidence that diversity experiences positively impact moral development. Further, the findings revealed that students who enter college with lower precollege academic ability might experience greater gains relating to the impact of diversity coursework on their moral growth.