The social, behavioural, and school adjustment of 41 9-year-old children in long-term residential group care in Greece was compared with that of children of the same sex and age brought up in two-parent families. Observational, interview, and questionnaire measures were employed. Observations in school classrooms showed that compared with their classmates, the group care children were more inattentive, participated less often in the classroom activities, were more likely to be passive, and tended to be involved in alternative and nonproductive activities. In the playground, they rarely interacted with non-institutional children. On both parent and teacher scales the group care children showed significantly more overall disturbance. The boys showed poor task involvement in the classroom and more emotional difficulties, conduct problems, and hyperactivity, whereas the between-group differences for girls were statistically significant only for emotional disturbance and poor task involvement in the classroom. Both boys and girls in long-term residential care showed less harmonious, confiding relationships with peers than those reared in families, and were more affection-seeking with teachers.