Irish-American = 50% or more Irish descent.

American (=US) population = 300 million (official) - It is actually about 320 million if you include the 32 million illegal aliens from Mexico.

Irish-American population = 70-75 million or approximately 1/4 of all Americans.

Next largest groups are English-Americans and German-Americans with about 60 million each.

Future dominate race = Mexican. Now at about 45 million (legal and illegal combined) they are growing at about 8 million per year. As they say: "do the math".