What are the three most numerous ethnicities in the united states?

The most numerous ethnicities in the United States are the African Americans, Asian Americans and the Hispanics. They are distributed such that the Hispanics occupy the southwest part, African Americans clustered in the south east and the Asian Americans occupy the west part.

The three most numerous ethnicities present in the United States of America would be Hispanics, African Americans and Asian Americans, they are clustered across the country in the states and regions in the Southwest, the Southeast and the West, respectively.