This book constitutes the refereed proceedings of the 25th IFIP WG 6.1 International Conference on Coordination Models and Language, COORDINATION 2023, held in Lisbon, Portugal, in June 2023, as part of the 18th International Federated Conference on Distributed Computing Techniques, DisCoTec 2023.

The 12 regular papers and 2 short paper presented in this book were carefully reviewed and selected from 27 submissions.

The papers deal with the following topics: Collective Adaptive Systems and Aggregate Computing; Cyber-Physical Systems; Verification and Testing; Languages and Processes; and Run-Time Changes.