The International Workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC) is a forum for promoting, discussing and spreading ideas in the fields of nonlinear RF devices, circuits and systems. INMMiC was originally launched in Duisburg, in 1990, and it assumed the present form in Rome, in 2004. Subsequently, INMMiC has been held at different venues around Europe. INMMiC 2026 will feature a two-day archival series of oral and poster presentations with distinguished invited talks. An industrial exhibit featuring a selection of state-of-the-art microwave products, measurement instruments and CAD software will also be held. The participation of young researchers and postgraduate students is strongly encouraged.