This two-volume set LNAI 16093-16094 constitutes the proceedings of the 19th European Conference on Logics in Artificial Intelligence, JELIA 2025, held in Kutaisi, Georgia, during September 1–4, 2025. The 39 full papers and 5 short papers included in this volume were carefully reviewed and selected from 108 submissions. They were organized in the following topics: Part I: Special Track: Logics for Explainable and Trustworthy AI; Argumentation; Constraint Satisfaction and Optimization; Deontic Reasoning; Description Logics and Ontological Reasoning; Higher-order and Non-classical Logics; Logic Programming and Answer Set Programming. Part II: Non-monotonic Reasoning and Belief Change; Propositional Reasoning, QBF, and Satisfiability Problems; Temporal Reasoning; Theorem Proving.