The relationship between parental alcohol dependence (with and without comorbid psychopathology) and adolescent psychopathology was examined in a sample of 665 13-17 year-old adolescents and their parents. Results indicated that adolescents who had parents diagnosed with alcohol dependence only did not significantly differ from adolescents who had parents with no psychopathology in regard to any of the measures of psychological symptomatology (substance use, conduct disorder, and depression) or clinical diagnoses (alcohol dependence, marijuana dependence, conduct disorder, or depression) assessed. In contrast, adolescents who had parents diagnosed with alcohol dependence and either comorbid drug dependence or depression were more likely to exhibit higher levels of psychological symptomatology. In addition, adolescents who had parents diagnosed with alcohol dependence, depression, and drug dependence were most likely to exhibit psychological problems. These findings underscore the importance of considering parental comorbid psychopathology when examining the relationship between parental alcoholism and offspring adjustment.KEY WORDS: comorbidity; substance abuse; conduct disorder; depression; COAs; adolescence.Previous research has indicated that children of alcoholic parents (COAs) are at an increased risk for many psychological problems during childhood, adolescence, and young adulthood. For example, COAs have been found to have an elevated risk for the development of externalizing problems such as conduct disorder, oppositional disorder, delinquency, and attention deficit disorder (Earls, Reich,