This is the fifth report of the Global Evidence Review on Health and Migration (GEHM) series. The publication focuses on the mental health needs of refugees and migrants by providing an overview of the available evidence on patterns of risk and protective factors and of facilitators and barriers to care at all levels (individual, family, community and national government). It identifies five high-level themes, each of which has implications for research and policy and is relevant across refugee and migrant groups, contexts and stages of the migration process: self-identity and community support; basic needs and security; cultural concepts of mental health as well as stigma; exposure to adversity and potentially traumatic events; navigating mental health and other systems and services.