This study examined social problem-solving ability and peer social behavior in popular and unpopular 5-6-year-old children. The 4 most popular and 4 least popular individuals in a school class of 26 children were identified. Responses to a series of four social dilemmas were obtained, and the children were videotaped during free class activities. Popular children gave significantly more effective (p < .01) and relationship oriented (p < .05) strategies for resolving social dilemmas than unpopular children, and they were involved in more peer interactions (p < .05), were more positively reinforcing (p < .01), and showed more positive activity when alone (p < .01).