The International Conference on the Chemistry of the Organic Solid State (ICCOSS) is a long-standing and prestigious conference series that has been held regularly since its inception in 1968 at Brookhaven National Laboratory, USA. Over nearly six decades, ICCOSS has evolved into a premier international forum for researchers working at the interface of solid-state chemistry, crystal engineering, and materials science. The conference has been hosted across diverse global locations, including North America, Europe, Asia, Africa, and Latin America, and consistently attracts leading scientists as well as young researchers. Recent editions such as ICCOSS XXIV (New York, USA 2019), ICCOSS XXV (Ohrid, Macedonia 2022), and ICCOSS XXVI (Cancún, Mexico 2025) have showcased cutting-edge advances in areas ranging from polymorphism and crystal engineering to functional materials and computational approaches, bringing together a global community of experts and early-career researchers in a vibrant scientific setting.