This study examined social and psychological adjustment of immigrant and Canadian-born Chinese children in Canada. Participants included a sample of elementary school children (N = 356, M age = 11 years). Data on social functioning, peer relationships, school-related social competence, perceived self-worth, and loneliness were collected from peer assessments, teacher ratings, and self-reports. The results indicated that immigrant and Canadian-born Chinese children had different experiences of social and psychological adjustment in the school. Among aspects of acculturation, English proficiency and participation in Chinese cultural activities were positively associated with social competence and negatively associated with adjustment problems, particularly in immigrant Chinese children. These results indicate the involvement of contextual factors in children's social functioning and psychological well-being. (Contains 2 tables, 1 figure and 1 note.)