This book constitutes the refereed proceedings of the 26th International Conference on Innovations for Community Services, I4CS 2026, held in Copenhagen, Denmark, during June 15–17, 2026.The 15 full papers and 4 short papers presented in this book were carefully reviewed and selected from 48 submissions. They are organized into topical sections as follows: Authentication and Resilience; Cybersecurity; Cyberincident Detection and Response; Artificial Intelligence for Work Processes; Artificial Intelligence for Decision Support; Smart Urban Infrastructure; and Distributed Systems.