Introduction: Medical students are at an increased risk of internet addiction and its effect on their sleep pattern and quality of life. Objective: To assess the prevalence of internet addiction in medical students and its association with their sleep quality and quality of life. Methods: A cross-sectional study was done in a tertiary level care institute Maharishi Markhandeshwar University, Mullana. A total of 592 students of various disciplines were enrolled they were provided questionnaire including Internet Addiction Test(IAT), Physical sleep Quality Index (PSQI) and Quality of Life-10 (QoL-10). The data was collected and statistical analysis was done on SPSS v21.0. Result: Prevalence of internet addiction was 13.5% and 1.5% for moderate and severe addiction respectively. From this study, the severity of internet addiction was significantly associated with poor sleep as well as decreased quality of life (P__ampersandsignlt;0.05). Conclusion: The prevalence of Internet Addiction and its effect on the Sleep Quality and Quality of life of medical students were found to be significant. Programs for creating awareness about Internet addiction and its effects on sleep and quality of life are needed to be done in colleges and universities which was a prime limitation of this study. Key Words: Internet Addiction (IA), Quality of Life (QoL), Sleep Quality, Prevalence, Medical Students, Screen Time, Somatic Symptoms