Psychological well-being is an essential determinant of adolescents’ academic success and personal growth. The present study investigated the psychological well-being of 320 Standard IX students in Chennai, including 170 boys and 150 girls, from government, government-aided, and private schools. Data were collected using the Psychological Well-Being Scale by Sisodia & Choudhary (2012). Personal variables such as gender, medium of instruction and type of school were considered. Statistical techniques included t-test and the findings revealed significant differences in psychological well-being across gender and type of school, while no substantial difference was observed in medium of instruction. The results emphasize the need for fostering supportive school environments, equitable opportunities, and parental involvement in enhancing adolescent well-being.