Introduction: Hypertension, an illness that develops as a result of high blood pressure, is intensely related with body mass index (BMI). Obesity has been distinguished to be single best predictor and major controllable contributor of incidence of hypertension. Objective: To evaluate relationship between BMI and Blood Pressure among students of 3rd year at (IMT) Institute of Medical Technology (DUHS) Design: Cross sectional study. Methodology: A total of 320 students, 163 males and 157 females participated in the study conducted between December 2011 and May 2012 at (IMT) DUHS. All students were divided into underweight, normal, over weight and obese category according to World Health Organization (WHO) BMI classification. Hypertension was determined from the measure of Blood pressure (BP). Comparison of blood pressure among different groups was made by ANOVA. Results: Among students 10.6 % were overweight (BMI: 24.9 to 29.9) and 2.2 % were obese (BMI of >30) while rest had a normal BMI. Their mean age was calculated to be 21.4 years and height 1.68 meters. A consistent increase was seen in the prevalence of hypertension in: normal, over weight and obese category i.e. 3%, 47% and 85% respectively. Mean values of systolic BP (104.66, 136.47, 150 mmHg) and diastolic BP (69.93, 92.94, 100 mmHg) also increased with increasing BMI. The prevalence of cardiovascular symptoms was higher at BMI levels above 24.9 but did not increase consistently with increasing BMI. Conclusion: The prevalence of high blood pressure was observed with increasing BMI among students. [ABSTRACT FROM AUTHOR]