Child marriage is increasingly recognized as a serious problem, both as a violation of girls’ human rights and as a hindrance to key development outcomes. As more resources and action are committed to addressing this problem, it becomes important to examine past efforts and how well they have worked. ICRW summarizes a systematic review of child marriage prevention programs that have documented evaluations. Based on this synthesis of evaluated programs, the authors offer an analysis of the broader implications for viable solutions to child marriage.