How do you say live in london french?

There are a few ways to say "live in London" in French, depending on the context and level of formality:

Formal:

* J'habite à Londres. (I live in London.)

* Je réside à Londres. (I reside in London.)

Informal:

* Je vis à Londres. (I live in London.)

You can also use the verb "demeurer" which means "to dwell" or "to reside" in a more formal way:

* Je demeure à Londres. (I dwell/reside in London.)

Remember that the definite article "le" is not used before London in French.