Published April 30, 2024 | Version v1
Dataset Open

MIrreM Public Database on Irregular Migration Flow Estimates and Indicators

  • 1. ROR icon Maastricht University
  • 2. ROR icon United Nations University – Maastricht Economic and Social Research Institute on Innovation and Technology
  • 3. ROR icon Erasmus University Rotterdam
  • 4. ROR icon Wetenschappelijk Onderzoek- en Documentatiecentrum
  • 5. ROR icon Vrije Universiteit Brussel
  • 6. ROR icon International Centre for Migration Policy Development
  • 7. ROR icon University of Milan
  • 8. ROR icon Iscte – Instituto Universitário de Lisboa
  • 9. ROR icon Universidad Complutense de Madrid
  • 10. ROR icon Osnabrück University
  • 11. ROR icon University of Leicester
  • 12. ROR icon University of Warsaw
  • 13. ROR icon Toronto Metropolitan University
  • 14. ROR icon University of Turku
  • 15. ROR icon University of Oxford
  • 16. ROR icon Universität für Weiterbildung Krems
  • 17. ROR icon Hellenic Foundation for European and Foreign Policy
  • 18. ROR icon Migration Policy Institute


This Public Database on Irregular Migration Flow Estimates and Indicators, in short MIrreM D5.2, is a MIrreM project deliverable under work package 5. This database provides an inventory and critical appraisal of available estimates and indicators related to irregular migration flows. More specifically, the database contains the country-level data collected by MIrreM’s national rapporteurs, as well as EU-level data from sources other than Eurostat. The datasets include meta-level information on sources and methodology and a quality assessment based on MIrreM’s criteria.

Users of this database are advised to consult the following companion document (henceforth, MIrreM Working Paper No. 9/2024) for a full discussion of the context, the underlying concepts, and the methodology used:

Siruno, L., Leerkes, A., Hendow, M. & Brunovská, E. 2024. Working Paper on Irregular Migration Flows. MIrreM Working Paper No. 9. Krems: University for Continuing Education Krems (Danube University Krems). 10702228.

The MIrreM project is a follow-up to CLANDESTINO, which covered the period 2000-2007. MIrreM extends this to the subsequent period 2008-2023. The data covered in this database reflect what is available within this period. Most of the data was collected between June and October 2023, and thus in some cases, the data are only until 2022 pending complete reports for 2023.


D5.2 MIrreM Public Database on Irregular

Additional details


MIrreM – Measuring Irregular Migration and related Policies 101061314
European Commission
Measuring Irregular Migration and related Policies (MIrreM) 10041473
UK Research and Innovation
Canada Excellence Research Chair in Migration and Integration, Toronto Metropolitan University 0
Social Sciences and Humanities Research Council