Child marriage does not cause fragile states, but it does reinforce poverty, limit girls’ education, stymie economic progress, and contribute to regional instability. But there is a wide gap in data that assesses the degree to which fragile contexts perpetuate child marriage, resulting in a gap in informed intervention. Closing this gap will help produce more effective and targeted interventions to assist the youngest and most at-risk members of communities in crisis, and improve the future prospects of all members of the next generation in some of the most challenging corners of the world.