This study examines the nature of the relationship between psychosocial factors and insomnia complaints in an adolescent non-clinical population. It is a cross-sectional study of a stratified sample of 2,195 Greek adolescent high-school students. Subjects were given the Athens insomnia scale, the Symptom Checklist scale (SCL-90-R) and a questionnaire concerning demographic characteristics. None of the subjects had received help for insomnia complaints or other overt psychopathology. Adolescents classified as suffering from insomnia presented higher levels of general psychopathology. Age, tobacco and alcohol use, self-reported patterns of communication in the family, perceived economic status and school performance were identified as correlates of the insomnia complaints. A significant number of adolescents fail to receive appropriate treatment for insomnia. Psychosocial correlates are important factors to consider when faced with insomnia complaints in this age group. More research is needed in important timelines in the developmental history of a young adult.