It is now widely accepted that preventing intimate partner violence is possible and can be achieved through a greater understanding of the problem; its risk and protective factors; and effective evidence-informed primary, secondary, and tertiary prevention. To that end, on August 11-12, 2014, the Institute of Medicine's Forum on Global Violence Prevention, in a collaborative partnership with the Uganda National Academy of Sciences, convened a workshop focused on informing and creating synergies within a diverse community of researchers, health workers, and decision makers committed to promoting intimate partner violence-prevention efforts that are innovative, evidence-based, and crosscutting. This workshop brought together a variety of stakeholders and community workers from Uganda, Kenya, and Tanzania to engage in a meaningful, multidirectional dialogue regarding intimate partner violence in the region. Preventing Intimate Partner Violence in Uganda, Kenya, and Tanzania summarizes the presentations and discussion of the workshop.