This Policy Brief outlines citizen engagement guidelines for the inclusion of older adults in public sector practices and digital tools used for the co-design of public policy. The guidelines have been generated by a European project called URBANAGE as part of its mission to support urban planners and policy makers in using new technologies to create inclusive, age-friendly cities. Input to the guidelines came from academic research and focus groups with 33 older adults in the cities of Santander in Spain, Helsinki in Finland, and the region of Flanders in Belgium.