This study examined childhood gender atypicality, lifetime victimization based on sexual orientation, and current mental health, including trauma symptoms and posttraumatic stress disorder (PTSD), among 528 lesbian, gay, and bisexual youth. Nearly 80% reported verbal victimization, 11% physical, and 9% sexual, with males reporting significantly more victimization. Victimization began, on average, at age 13. Verbal attacks occurred as early as age 6, physical attacks at 8, and sexual attacks at 9. Youth who were considered gender atypical in childhood reported more victimization and more current mental health symptoms. PTSD was found in 9% of youth and was associated with past physical victimization. (Contains 5 tables.)