This paper develops a framework for identifying and fostering social impact for ‘supplemental’ (cultural, sporting and other) events which run in tandem with major sporting events. The framework links the aims of supplemental events with a classification of event activities in terms of achieved social impact and potential social benefits. Data supporting the study were collected from over 150 interviews conducted with tourists and local attendees at two supplemental events (Fan Zone and Trophy Tour) held in Australia as part of the 2015 International Cricket Council Cricket World Cup. Short-term social impacts emerging from the findings included a shared sense of community resulting from the atmosphere and ambience of the events. Potential longer-term social benefits, such as healthier lifestyles, were also identified by both tourists and locals. The framework enhances the current understanding of strategies for fostering social impact and potential social benefits by providing an analytic tool to examine supplemental events and their effects on tourists and locals.