O-positive (O+) is the most common blood type by average percentage.
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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