This paper reviews evidence on program effectiveness generated by impact evaluations and how this evidence has informed program design and policy in low- and middle-income country contexts. It recognizes that there is a growing number of impact evaluation initiatives to study forced displacement programs. It reviews examples of this work and reflects on differences, challenges, and innovations that characterize these impact evaluations. The paper shows that impact evaluations are starting to generate much-needed evidence on program effectiveness in displacement contexts and helping to inform resource allocation for the benefit of displaced people and host communities.