Regionalisation is the process of transferring power from the central government to the regions, for a better application of the subsidiarity principle, within the framework of national or federal solidarity. It includes the establishment, enlargement or empowerment of authorities and the transfer of competences and responsibilities to the regions.

The Governance Committee and the Chamber of regions of the Congress are responsible for legal and political issues regarding to regionalisation in the Council of Europe member States. They examine in particular the developments regarding the institutional and administrative organisation of regions, their competences and financial autonomy.