Background: Familial patterns of hypertension suggests genetic factor as another important non-modifiable predisposing factor, and accumulated benefit obligation (ABO) blood group is one of such factor. Blood group frequency varies across continents. Blood category O is the most prevalent in general, while AB is rare.ABO is essential as well as practical for transplantation and transfusion among 33 blood group systems. BMI does not specifically quantify body fat, but with more precise body fat measurements, BMI is moderately correlated. The presented study was aimed to determine the frequency of various blood groups and their correlation with BMI. Methods:Blood group was determined by standard anti-sera. Blood samples was collected by finger-prick with sterile disposable needle after cleaning the puncture site with spirit and a red cell suspension was prepared. Then, on separate glass slides, on one half, one drop of the three anti-sera was added and on the other side a drop of normal saline was added. Then a drop of the red cell suspension was added on both sides. Blood groups was determined on the basis of presence or absence of agglutination. Agglutination was confirmed by observing under low-power objective of a compound microscope. Results:The difference between BMI and blood group was found to be statistically significant (p 0.000). There were 42 patients whose blood group was O+ in which 11 were overweight, 26 were normal weighted while 5 were underweight. Of the 40 patients with B+ blood group, 6 were overweight, 30 were normal weighed while 4 were underweight. Overweight subjects were 3 in number, 19 were normal weight while 4 were underweight constituted the 26 A+ patients. Conclusion: The most prevalent blood group amongst the students was found to be O positive. Normal BMI was observed in a majority percentage of the total population.