This study tackles the issue of female child marriage in the Arab region, particularly in conflict and humanitarian settings. It explores the causes of this problem, with a distinction between such structural determinants as family and community relations and gender roles that have long been present in many Arab countries, and such contextual determinants as instability, displacement and extreme poverty. It also investigates the economic and health effects of child marriage, for young brides, their children and their communities, especially in post-conflict contexts. The study also provides an overview of national obligations with regard to preventing child marriage, as stipulated by international instruments and humanitarian laws. It concludes with policy recommendations to address the multifaceted dimensions of child marriage and its implications for the rights of the girl-child.