Migration and its interlinkages with development has be- come a topic of high interest for researchers as well as policymakers in the last few years. In the global South, topics such as emigration in combination with remittances, brain drain/gain and circulation, and the links between migration and development are the focus of interest. In the global North, the main focus of intense debate are immigra- tion policies. Despite this increasing interest in migration and its various effects in source and host countries, both statistical data on migration and various development indi- cators are either relatively poor or completely lacking. How- ever, data are needed to better understand the interaction of migration and development and to formulate new poli- cies. There is also a great need for improved data. The present paper focuses on the availability and quality of globally comparable data on migration and selected devel- opment indicators, and describes the challenges and prob- lems faced when working with such data.