Reference Sites are inspirational ecosystems, delivering creative and workable solutions that improve the lives and health of older people and the whole community, in a framework of equity and social sustainability. Reference Sites are regions, cities, that bring together key stakeholders within the Quadruple Helix Model – public administrative authorities including health and care providers, research, industry, and civil society to focus on a comprehensive, innovation-based approach to active and healthy ageing. They offer concrete examples of their positive impact in this field. Stakeholder partners in a Reference Site are leading regional organisations committed to investing in innovation for active and healthy ageing and supporting the transfer and scaling-up of that innovation locally, regionally, nationally, and across Europe. There are currently 103 EIP on AHA Reference Sites across 24 member States.