This is one of a series of five papers outlining the particular domains and dimensions of inequality where new research may yield a better understanding of responses to this growing issue.Mental health is recognized as a central determinant of individual well-being, family relationships, and engagement in society, yet there are considerable variations in mental health and mental health care according to race and ethnicity among youth in the U.S.In their report, Margarita Alegría and colleagues investigate disparities in mental health and mental health services for minority youth. Taking a developmental perspective, the authors explore four areas that may give rise to inequalities in mental health outcomes, highlight specific protective factors and barriers to care, and, finally, outline an agenda for future research