The ESMO Immuno-Oncology Congress 2026 is a premier international event hosted by the European Society for Medical Oncology (ESMO), scheduled for December 14–16, 2026, as an onsite event in London, United Kingdom, with an online option also available.

The congress serves as a critical platform for exchanging knowledge and fostering collaboration in immuno-oncology, covering the entire spectrum of the field from basic science to translational research and clinical development. The meeting will feature the latest scientific advances, offering researchers, clinicians, and other stakeholders excellent opportunities to interact, share expertise, and engage with the global community committed to advancing cancer care through innovation.