^ What's the American ethnicity?  Whites who have been here since the first colonists? People who choose American on those surveys, are usually White people who are mixed of multiple different White ethnicities and have no identity as being Irish or German or Italian etc..They are just White Americans. That's probably what I would choose if I did one of those things too because even though I'm predominantly Irish I'm also a good portion German and part Italian and French. I don't consider myself Irish-American, I'm just American, and there is nothing wrong with that!