Between October 2013 and July 2016, over 156,000 children traveling without their guardians were apprehended at the US-Mexico border and transferred to the care of the Office of Refugee Resettlement (ORR). During that same period, ORR placed over 123,000 unaccompanied migrant youth-predominantly from Central America-with a parent or other adult sponsor residing in the US. Following placement, local communities are tasked with integrating migrant youth, many of whom experience pre- and in-transit migration traumas, family separation, limited/interrupted schooling, and unauthorised legal status, placing them at heightened risk for psychological distress, academic disengagement, maltreatment, and human trafficking. Nonetheless, fewer than 10% of young people receive formal post-release services. This paper addresses the paucity of research on the experiences of the 90% of children and youth without access to post-release services. To bridge this gap, this article: (a) describes the post-release experiences of unaccompanied youth, focusing on legal, family, health, and educational contexts; (b) identifies methodological and ethical challenges and solutions in conducting research with this population of young people and their families; and (c) proposes research to identify structural challenges to the provision of services and to inform best practices in support of unaccompanied youth.