Cross-border cooperation is collaboration between adjacent areas on both sides of a border.

In the European Union, as a supranational union, community and national government institutions seek a European model where cooperation between border regions or municipalities between States is very close, with the objective that the border goes unnoticed by the lives of the citizens of said regions. These structures are generally made up of public administrations (municipalities, districts, counties, counties, regions) from different States that are organized through work communities, Euroregions or EGTC (European Groups of Territorial Cooperation).[1]​[2]​[3]​ In the Committee of the Regions (CoR), regional and local entities debate and propose improvement and cooperation plans to the European Commission.