This study examined whether executive functions (EFs) moderate the association between independent and interdependent self‐construals and social adjustment in 488 Moroccan, Romanian, and Italian preadolescents (ages 11–13) in Italy. Participants were assessed using self‐report questionnaires and standardized EF tasks. Better working memory was related to increased social competence across all groups. High levels of inhibitory control were found to enhance the positive relation between interdependence and prosocial behavior for native Italian youth, and between interdependence and social competence for Moroccan preadolescents. High levels of cognitive flexibility boosted the interdependence–social competence link for the immigrant groups, whereas among native Italian preadolescents, the interdependence–social competence link was significant at low levels of flexibility. Implications for developmental theory and practice are discussed.