This report is a first attempt to take comprehensive stock of the disaster displacement data that is collected and published at the global level, and it reveals a number of inconsistencies. These include who is defined as displaced and no longer displaced, and which events and phenomena trigger the collection of data – and which do not. The report examines who collects disaster displacement data, how they do it and for how long, and highlights good practices as well as gaps. It discusses the availability of data about the scale and location of new displacement, its cross-border dimensions, the characteristics of those displaced and data about returns and other processes that would help to understand when displacement ends. It also looks at the data available to assess the risk of future displacement, and what is missing.