Where I live most of us refer to people from the USA as Americans.
I know America comes in two North and South America so technically a guy from Canada/Mexico is an American, but the USA is the only country in the Americas that have America in its name. You will have to pay me for me to stop referring to people from the USA as Americans.

__________________
This whole internet thing is probably not a passing fad.-Ronald Brak
While speech might be free, consequences cost.-Doodler