The U.S. Department of Health and Human Services estimates that the number of homeless and runaway youth ranges from 575,000 to 1.6 million per year. And, according to the National Runaway Switchboard, up to 42 percent identify as lesbian or gay. Additional research has found that homeless youth also disproportionately identify as bisexual and transgender. LGBT youth experience homelessness at a disproportionate rate, prompting the National Gay and Lesbian Task Force (the Task Force), in collaboration with the National Coalition for the Homeless (NCH), to produce this publication. Through a comprehensive review of the available academic research and professional literature, we answer some basic questions, including why so many LGBT youth are becoming and remaining homeless. We report on the harassment and violence that many of these youth experience in the shelter system and we summarize research on critical problems affecting them, including mental health issues, substance abuse and risky sexual behavior. We also analyze the federal government’s response to youth homelessness, including the specific impact on LGBT homeless youth of increased federal funding for faith-based service providers.