How do you say she is Greek in French?

There are a few ways to say "she is Greek" in French, depending on the context and formality:

Formal:

* Elle est grecque. (This is the most common and neutral way to say it.)

Informal:

* C'est une Grecque. (This is more informal and can be used with friends or family.)

* Elle est de Grèce. (This literally means "she is from Greece", but can also be used to say she is Greek.)

The best way to choose the right phrase depends on the situation.