What is the most common blood type?
Most Common Blood Type
O-positive (O+) is the most common blood type by average percentage.
Blood Type Percentages in the US
This chart is an average distribution of the blood types in the United States. Learn more about blood types and recommended types of donations.
The distribution of blood types 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 % |
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