This chapter focuses on racial/ethnic disparities in sleep, including Black–White differences in sleep health using data from nationally representative data sets. It also examines reasons for racial/ethnic disparities in sleep, including measurement artifact, biological/genetic differences, and the social and economic influences that influence sleep health in racial and ethnic minorities. Some of the factors that may contribute to racial/ethnic differences in sleep health include genetic, biological, physiological, psychological, behavioral, cultural, and environmental differences across these populations The chapter draws upon intersectionality theory, a framework that acknowledges how multiple social categories (e.g., race, ethnicity, employment, socioeconomic status) intersect with macro-level phenomena and reflect multiple interlocking systems of privilege that present real consequences for sleep and health.