What ethnic groups are there in America? The British have the most people?

Mainly descendants of British immigrants, especially whites.

Followed by Latin American immigrants, mainly white people of Spanish descent, and many of them are mixed-race Spanish and Indians.

Followed by descendants of African black immigrants,

Followed by Jews, white people.

Followed by the descendants of immigrants from other European countries, mainly white.

Followed by East Asian immigrants, yellow race.

Followed by Indians, immigrants from West Asia, and whites.

Followed by Indians, yellow race.

There are many descendants from other countries.