In America if you are 15 what grade are you in?

Answer 1

You would be in either 9th or 10th grade, since you are supposed to turn 15 sometime during 9th grade (or the summer after it if you have a later summer birthday) and then begin 10th grade at 15 too.

Answer 2

Well, honey, if you're 15 in America, you're most likely in 9th grade. But hey, don't stress too much about it, just enjoy being a teenager and causing a little bit of trouble along the way.