Adolescents in India contribute to 22% of the country’s population and are susceptible to various preventable and treatable health issues. This study estimates the burden and describes the pattern of gynaecological disorders among adolescent girls attending the outpatient and inpatient departments of a private medical college hospital in South India. A cross-sectional study among 500 adolescent girls aged 10-19 years was conducted from Dec 2020 to Dec 2021. Data were analyzed using IBM SPSS 23, Chi-square, Fischer exact, and Mann-Whitney U tests. Results showed 60.6% with menstrual abnormalities, 48% with leucorrhoea, 13.6% with urinary tract infection, and 10.8% with PCOS, highlighting a high burden of gynaecological disorders and lack of awareness among adolescents.