ABSTRACT
To determine the percentage of ABO and Rhesus blood groups among population of the city of Mashhad. The blood groups of studied population was performed using routine method of blood grouping. Eight hundred sixty-seven subjects aged 8 Year and above including 436 male and 431 female. The subjects were randomly selected from 20 different areas of the city of Mashhad. The results showed that the percentage of blood groups A, B, AB and O among studied population was 23.1%, 23.3%, 8.9% and 34.7% respectively. 88.71% of studied population was rhesus positive and 11.3% rhesus negative. This study revealed the percentage of different blood groups for the population of the city of Mashhad that was significantly different with those of several other studies