What is the most common blood type?
This is an average distribution of the blood types in the United States. The distribution may be different for specific ethnic groups:
| Blood Group / RH Status | Percentage |
|---|---|
| O Positive (O +) | 38 % |
| O Negative (O -) | 7 % |
| A Positive (A +) | 34 % |
| A Negative (A -) | 6 % |
| B Positive (B +) | 9 % |
| B Negative (B -) | 2 % |
| AB Positive (AB +) | 3 % |
| AB Negative (AB -) | 1 % |
