Background: BP normally varies with age, sex and time of day. It increases with increasing age, is higher in males and demonstrates higher levels in the morning.It also varies with ethnicity.BP also demonstrates tracking which is maintenance of ranking with those of peers throughout life, implying that those that rank at higher ranges of normal are more likely to progress into hypertensive levels in later life. Aim: This study was done to evaluate asymptomatic hypertension among adolescent school going children. Methods: The present study was conducted at Dept. of PEDIATRICS, SHRI KRISHNA MEDICAL COLLEGE AND HOSPITAL, Muzaffarpur, Bihar, after obtaining clearance from institutional ethical committee, Informed consent was taken from the parents before including into the study. This is a prospective study, to evaluate blood pressure profile of apparently healthy high school going adolescent. Study duration: September 2021 to February 2023. Results: In the present study, the study group had 10% children of 13, 14, 15 and 16 years, 9% children of 6, 8, 9 and 12 years and 8% children of 7, 10 and 11 years. 54% children were female while male children constituted 46% of the study group. Conclusions: The mean values of systolic and diagnostic blood Pressure in overweight and obese group is significantly higher with p value <0.001. For a given age, blood pressure levels were higher in taller and obese children.Children with family history of hypertension and those belonging to higher socio economic status (class I) had increased systolic and diastolic blood pressure. Higher body weight may be used as a predictor of high blood pressure. Overweight and obesity in children should be considered as pre disease state which may lead to development of hypertension and related cardiovascular complications in later life.