What is the Most Common Blood Type?

Updated July 24, 2020 | Infoplease Staff

The Question:

What's the most common blood type in the United States and World?

The Answer:

In the United States, 37% of the population has type O+ blood, making it the most common type. It's followed closely by A+, with 34%. The blood group O is the most common in the world with 47% of the population having this blood type.

Find out much more on our Blood Types page!

-The Editors

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