The purpose of this report is to provide an overview of the main population movement trends that affected the East and Horn of Africa in 2018. The region continues to exhibit high mobility patterns, both internally within countries and across national boundaries. Migration is triggered by a complex mix of protracted crises, emerging internal conflicts, socio-economic drivers, emerging health crises and more traditional seasonal and livelihood factors. The population trends in the EHoA are mixed in nature, multi-directional, and intra- and extraregional in scope, thus requiring a multi-layered set of tools to investigate them.