Today’s lesbian, gay, bisexual, and transgender (LGBT) youth come out at younger ages, and public support for LGBT issues has dramatically increased, so why do LGBT youth continue to be at high risk for compromised mental health? We provide an overview of the contemporary context for LGBT youth, followed by a review of current science on LGBT youth mental health. Research in the past decade has identified risk and protective factors for mental health, which point to promising directions for prevention, intervention, and treatment. Legal and policy successes have set the stage for advances in programs and practices that may foster LGBT youth mental health. Implications for clinical care are discussed, and important areas for new research and practice are identified.