This book constitutes the refereed proceedings of the 30th International Conference on Implementation and Application of Automata, CIAA 2026, held in Kingston, ON, Canada, during August 5–8, 2026.

The 14 full papers included in this volume were carefully reviewed and selected from 34 submissions.

The CIAA 2026 proceedings deal with all aspects of application, implementation, and theory of automata and related structures.