Little research has examined the full-range of participation among adults on the autism spectrum. The current study addresses this knowledge gap by comparing the frequency, importance, breadth, and sufficiency of participation between autistic adults and adults in the general population. Autistic adults participated less, had fewer areas that were important to them, participated in fewer areas that were important to them, and were less satisfied with their participation even after controlling for demographic characteristics. Moreover, this study raises questions about what influences their perceptions about the breadth of activities that are important to them and the degree to which they desire to participate in those areas. Suggestions for future interventions and research are offered.