The playground may be an important context to examine the social functioning of children with autism spectrum disorder. Previous literature on playground peer engagement has used quantitative methods, but there is limited research using qualitative observations to understand the nuances of playground behavior. Using a mixed-methods approach, 55 elementary school-aged children with autism spectrum disorder who are primarily included in general education settings were observed on the school playground using the Playground Observation of Peer Engagement. Quantitative and qualitative data were examined using a mixed-methods approach. The results showed that children with autism spectrum disorder: engage in solitary and peripheral activities; demonstrate appropriate initiations and responses to peers; display self-stimulatory, motoric behaviors most frequently during solitary activities; and often have neutral affect on the playground. These findings suggest that intervention and supports for children with autism spectrum disorder may be important to deliver at recess to address peer engagement.