Learn French: Vous habitez où dans le monde ? - Where in the world do you live?

D'où means "from where", like when you ask where someone is originally from. In this sentence, you are asking where they are currently living, which is just "where" (où). You use où for a current location and d'où for an origin.

Why is où in the middle of the sentence instead of at the beginning?

In everyday spoken French, it is very common to leave the question word right after the verb instead of moving it to the front. You could also say Où habitez-vous dans le monde ? or Où est-ce que vous habitez dans le monde ?, but Vous habitez où... is very natural and common in casual speech.

How do I pronounce Vous habitez?

You need to make a connection (a liaison) between the two words. Because habitez starts with a silent "h" followed by a vowel, the usually silent "s" at the end of vous wakes up and sounds like a "z". Together, it sounds like "voo-zah-bee-tay".

Why is it dans le monde instead of au monde?

Dans le literally means "inside the". When asking "where in the world" as a physical location, French uses dans le monde. You will see au monde later on, but it is mostly used for superlatives, like saying something is "the best in the world".