Most Common Blood Types in America

Yesterday we published an article about the world’s rarest blood type. A reader asked us a related question on what are the most commonly found blood groups in the American population? Today we will discuss the same.

Blood, as you know, is the life fluid. Its flow in our circulatory system makes our life possible. 45% of the blood is made up of the Red Blood Cells (RBC) and 55% is plasma. The most widely used blood categorization system is called the ABO system. It is based on the antigens (proteins) found on the surface of RBCs.

• If antigen A is present on the RBC surface, blood type will be A
• If antigen B is present on the RBC surface, blood type will be B
• In case both these antigens are present, blood type will be AB
• If none of these is antigens is present on the RBC surface, blood type will be O

These four blood groups are found in two versions — positive and negative.

Because blood type is a trait that is genetically determined — blood types tend to show prevalence in a geographic area. So, which blood type is most common in the USA?

Most Common Blood Groups in USA

Well, according to American Red Cross, blood type O+ is most common in United States.

Here is the average blood type distribution in the US population:

1. O+ = 37.4%
2. O- =  6.6%
3. A+ = 35.7%
4. A- = 6.3%
5. B+ = 8.5%
6. B- = 1.5%
7. AB+ = 3.4%
8. AB- =  0.6%

Because the total American population consists of a number of races and ethnic groups, here is the ethnicity-wise data:

Do let us know if you have any questions or comments on this subject. Thank you for connecting with WeCapable!