The INTERREG IIIC programme is one of the three strands of the European Community Initiative INTERREG III.

INTERREG III is designed to strengthen economic and social cohesion in the European Union (EU) by promoting cross-border (strand A), trans-national (strand B) and interregional (strand C) co-operation.

With INTERREG IIIC, interregional co-operation between regional and other public authorities across the entire EU territory and neighbouring countries will be promoted. It allows regions without joint borders to work together in common projects and develop networks of co-operation.

The overall aim is to improve the effectiveness of regional development policies and instruments through large-scale information exchange and sharing of experience (networks) in a structured way.