This book constitutes the refereed proceedings of the 14th International Conference on Logistics and Maritime Systems, LOGMS 2026, held in Barcelona, Spain, during July 7–10, 2026.The 25 full papers presented in this book were carefully selected and reviewed from 35 submissions. These papers have been organized in the following topical sections: Port Operations and Terminal Optimization; Green Shipping and Energy Transition; Maritime Networks, Routing, and Hinterland Logistics; and Maritime Intelligence and Data Analytics.