Title: Correlation of Body Mass Index and Waist Hip Ratio on Blood Pressure in Adolescents according to age groups. Background: Obesity is increasing dramatically nowadays in adolescents due to unhealthy diet and sedentary lifestyle. This may lead to various disorders such as hypertension, diabetes mellitus, etc. in their future life. So it is important to prevent them since early age. So this research will help to know the risk factor and also a suitable method to know that. Aim: This study was conducted to examine the correlation of the body mass index and waist hip ratio on blood pressure in adolescents according to age categories. Method: Study involved 100 participants (adolescents). Data was obtained by measuring body mass index, waist hip ratio and blood pressure. Data analysis was done according to Karl Pearson co-efficient. Outcome Measure: Body Mass Index and Waist Hip Circumference. Result: The average waist-hip ratio was 0.81 in female adolescents and 0.78 in male’s adolescents. A total of 71% of the sampling had normal weight, and 82% had normal blood pressure. Both body mass index and waist-hip ratio had an effect on blood pressure, but body mass index in particular had a greater effect. Conclusion: To determine chronic health problems at an early age, it is necessary to follow up with adolescents at health centres and train them at school about healthy lifestyles.