Asklemmy

This probably isn’t helpful for referring to all Americans but in the U.S., we use whatever state/regjon within the United States a person is from as the demonym. So, someone from California would be Californian, someone from Texas would be Texan. For a regional example, someone from the Northeast would be a New Englander.

For most of the history of the Republic, the states viewed themselves sort of like EU countries do now: independent states in America that united. It probably wasn’t until the World Wars that it changed.

It can get more complicated, unfortunately. Native Americans would probably use their tribal name instead of the state, for instance. But that’s why we don’t have a demonym and everyone has resorted to USian or USAian on message boards.

Not too sure about gringo but I know yankee is correct, I hear that one a lot from folks I know in the UK.

There's some weird linguistic drift where in the southern US, we call northerners yankees, even though in the rest of the world we're all yankees. Now I'm curious how that started.

Unfortunately the USAians are so dominant in the region of the Americas that they've coopted the term American for most people. My Columbian friend hates when we refer to USAians as Americans because he says "hey we were here first" 😆. But unfortunately that's the way it is.

Yanks or Yankee Doodles is what we used to call them but they get rather upset these days when you call them that. I wouldn't call them gringos because it just sounds unnatural for a Brit to say that seriously.

Yankistani.

Usonian also works.

USian

If I want to come off as a pseudo-intellectual I call them Yankee for east-north and Dixie for south-west (but also Florida and the bible belt) and gringo for hispanic Americans. I don't know if any of those terms are really correct to use in that context and my definitions are entirely vibes-based.