The 17th International Conference on Deontic Logic and Normative Systems (DEON 2025) will be held June 30 - July 03, 2025 at TU Wien (Vienna, Austria). We happily invite paper submissions and participation at DEON 2025. *About the DEON conference series* The biennial International Conference on Deontic Logic and Normative Systems (DEON) conference series aims at bringing together researchers interested in the formal study of normative concepts, normative reasoning, and normative systems using methods from computer science, artificial intelligence, philosophy, linguistics, mathematics, and law. The series particularly aims at fostering interdisciplinary collaboration that combines methods from these various fields. Topics include but are not limited to the investigation of normative reasoning, concepts, and systems in relation to: - agency and action - argumentation - defeasible reasoning - deontic modals - epistemic reasoning - explainability - knowledge representation - legal reasoning - multi-agent systems - natural language - norm change/revision - philosophy of reasons - policy - preference reasoning - responsibility - social values - temporal reasoning - trustworthy systems We welcome submissions of both theoretical and applied research for DEON 2025, and encourage interdisciplinary work. *Special focus* In addition to the general themes of the DEON conference series, DEON 2025 encourages the submission of papers on the special theme of Normative AI. The central aim of Normative AI is to ensure that AI systems make morally, legally, and socially acceptable decisions. As AI becomes increasingly important to human society, it is crucial to ensure that these technologies have a positive and responsible impact. This highly interdisciplinary field involves the evaluation and development of theories, formal frameworks, and algorithms, integrating both symbolic and sub-symbolic AI methods. *Important dates* - Abstract submission deadline: March 01, 2025 - Paper submission deadline: March 08, 2025 - Notification of acceptance: May 08, 2025 - Camera-ready version: May 25, 2025 - Conference: June 30 - July 03, 2025 *Submission details* We invite submission of original and unpublished work. Parallel submission to journals or other conferences or workshops with published proceedings is not permitted. The reviewing process is single-blind (non-anonymized). Papers should be written in English. Submitted papers should not be longer than 15 pages (excluding references and technical appendix). Paper submission in PDF format will be managed through EasyChair. *Publication* The proceedings of the conference will be published by College Publications as an open-access book and will be available for participants during the conference. *Program Chairs* Agata Ciabattoni, Vienna University of Technology (TU Wien), Vienna, Austria John Horty, University of Maryland, USA Website: https://sites.google.com/view/deon-2025/home