Background: Sleep affects mental, emotional and physical wellbeing of an adolescent. On an average for adequate development an adolescent should sleep for at-least 8 to 10 hours per day. Objectives: To study the pre-sleep activities affecting the sleep of rural and urban adolescents. Methods: A cross-sectional questionnaire-based school survey was designed with a sample size of 992 for the adolescents aged between 10 to 16 years of age. Children with illnesses that affected their sleep were excluded from the study. A pre-designed questionnaire was distributed to each of them. Later the data was tabulated in Microsoft excel and statistical analysis was done using software SPSS 22.0