Account → Privacy & data → Delete my account. You will be asked to type DELETE to confirm, because it cannot be undone.
What is removed
Your profile, private details, listings, trips, reviews and uploaded photos.
What is kept
Records of past payments, in a form that is no longer linked to your name or email. Tax law requires transaction records to be retained; the right to erasure does not override that.
When you cannot delete yet
If you have confirmed upcoming stays — as a guest or a host — deletion is blocked until they are completed or cancelled. Otherwise the person on the other side would lose a stay they had booked and paid for.