Aim: This study aimed to find the prevalence of depressive symptoms among adolescents studying in schools in Chennai. Settings and Design: The study was a school based cross sectional survey in which data were collected through a self administered questionnaire from adolescents studying in classes X, XI and XII. Material: Beck Depression Inventory (BDI) was administered to nine hundred and sixty four adolescents -boys (n=509) girls (n=455) -studying in twenty one schools spread across the city. Results: Based on the cut-off scores, 378 adolescents (39.2%) were found to be non-depressed, 358 (37.1%) were mildly depressed, 187 (19.4%) were moderately depressed and 41 (4.3%) severely depressed. In the present sample of adolescents, among the 21 depressive symptoms in the BDI, experience of emotional manifestations of depression like sadness, irritability, self-accusations and crying spells dominated over cognitive, behavioral and physical manifestations of depression There were no significant gender differences but a higher proportion of girls (27%) reported moderate to severe depression than boys (21%). There was an association between age and depression with increasing depression in older adolescents. Conclusion: Individual symptoms of depression and depressed mood are common in adolescents. Depressive symptoms are an unrecognized problem among adolescents that necessitates the need for recognition. Thus, understanding the prevalence of adolescent depressive symptoms is important for developing appropriate screening strategies, treatment planning, follow-up for those small proportion of adolescents who could become clinically depressed. Current poor understanding of the factors that influence depressive symptoms makes these efforts challenging.