Some recent studies suggest that sexual minorities may have worse health-related outcomes during adolescence because they report lower levels of family connectedness, a key protective resource. We examine whether lesbian, gay, and bisexual (LGB) young adults report lower levels of parental support than their heterosexual peers and whether differences in parental support help explain why LGB young adults tend to have worse health-related outcomes. Even though the transition from adolescence to young adulthood is characterized by increased independence from parents, parental support remains an important correlate of health-related outcomes during this stage of life. Sexual minorities report lower levels of parental support during young adulthood, which helps explain why they have worse health-related outcomes. Interventions designed to strengthen relationships between LGB young adults and their parents could lead to a reduction in health disparities related to sexual orientation.