Entropy 2026: Exploring Complexity and Information in Science is an international academic conference to be held in Barcelona, Spain, from 1 to 3 July 2026. This conference will bring together researchers working in entropy research, statistical physics, quantum information and quantum computing, complex systems, and related fields. We particularly welcome interdisciplinary contributions from both theoretical and applied perspectives. Submissions may also address conceptual and methodological advances, as well as innovative applications of entropy and information theory across a broad range of domains.