I saved a post which has Oprah's address. Hope it helps.
I have another address letters to Oprah can be sent to:
Again it may be addressed:
Oprah or Oprah Winfrey or Harpo Productions or any combination
of
these.
PO Box 909715 - Chicago - IL - 60690
There is also a phone number that may be called (and real people
actually
answer it!)
312 - 633 - 0808