Irregular migration is a top priority in the European Union. Despite the political relevance of the phenomenon, assessments of the size of the irregular migrant population are often vague and of unclear origin. This website aims at increasing transparency in this sensitive field. It was created in the framework of the EU-funded research project CLANDESTINO (2007-2009) . Since the termination of the project, information is updated occassionally by the database coordinators. 

• find estimates for individual countries and Europe (European Union and individual countries)
• find explanations on the presentation and classification of estimates (Methodology)
• find background information (Reports, Working papers, Link library and Organisations and projects)