Andy Weir fan mail address
To send fan mail to Andy Weir, mail your letter to Andy Weir, c/o Ballantine Books, 1745 Broadway, New York, NY 10019, USA. Andy Weir is a science-fiction novelist — author of The Martian, Artemis, and Project Hail Mary. Letters reach Andy Weir through Ballantine Books, Andy Weir's imprint at Penguin Random House, which forwards reader mail to its authors — never a private home. Authors do change publishers, so confirm Andy Weir is still with Ballantine Books before sending. Don't enclose cash, gifts, or books to be signed, and add your return address if you're hoping for a reply.
Andy Weir — fan mail address
Andy Weir c/o Ballantine Books 1745 Broadway New York NY 10019 United States
Fan mail and letters. This goes to Ballantine Books, Andy Weir's imprint at Penguin Random House, which forwards reader mail to its authors — not a home address. Authors do change publishers, so confirm Andy Weir is still published by Ballantine Books before sending.
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Andy Weirc/o Ballantine Books1745 BroadwayNew York, NY 10019
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Key facts
- Letters go c/o Ballantine Books at Penguin Random House — a public office that forwards reader mail, never a home address.
- Andy Weir is a science-fiction novelist: author of The Martian, Artemis, and Project Hail Mary.
- Authors change publishers; confirm Andy Weir is still published by Ballantine Books before mailing.
- A personal reply or signed bookplate is never guaranteed — include your return address to improve the odds.
- Send letters only: publishers ask you not to send books to sign, gifts, or cash, and can’t forward parcels.
- PostPal prints your letter and mails it for you — no printer, envelope, stamps, or post office trip.
How to send your letter
- 1
Confirm who publishes them now
Authors move between publishers, so before you send, check that Andy Weir is still published by Ballantine Books (part of Penguin Random House) — see the sources below. If they've moved, address your letter to the new publisher instead. Some authors also list a preferred contact or agent on their own website.
- 2
Write your letter
Keep it to paper. Publishers forward reader mail but won't pass on cash, gifts, or valuables, and most ask you not to send books or items to be signed. Add your return address if you'd like a chance at a reply, though a personal response is never guaranteed.
- 3
Address it c/o Ballantine Books
First line: Andy Weir. Next line: c/o Ballantine Books. Then the publisher's address: 1745 Broadway, New York NY 10019, United States. That building is Penguin Random House's office, which routes the letter to Andy Weir at Ballantine Books.
- 4
Send it from anywhere with PostPal
Write or upload your letter to PostPal with the address above prefilled. We print it, add your return address, and mail it for you — no printer, envelope, stamps, or trip to the post office.
Common questions
What is Andy Weir's fan mail address?
Andy Weir, c/o Ballantine Books, 1745 Broadway, New York, NY 10019, USA. Letters go to Ballantine Books, Andy Weir's imprint at Penguin Random House, which forwards reader mail to its authors — not a home address. Confirm Andy Weir is still published by Ballantine Books before mailing.
Will Andy Weir read my letter or write back?
Maybe. Publishers pass reader mail to their authors, but best-selling writers receive far more than they can personally answer. Include your return address to give yourself the best shot at a reply or a signed bookplate, but treat a personal response as a bonus, not a guarantee.
Is this Andy Weir's home address?
No. This is the public head office of their publisher, Penguin Random House. We never publish authors' private home addresses — mailing someone's home would not be okay. Routing fan mail through the publisher is the standard, expected way to write to an author.
Can I send Andy Weir a book to sign or a gift?
Better not to. Penguin Random House — like most publishers — asks readers not to send books, photos, or items to be signed, and can't forward parcels, gifts, or cash. A letter is the surer bet; PostPal sends letters and printed documents, not packages.
How do I mail Andy Weir a letter without a printer?
Write or upload your letter to PostPal with the address prefilled. We print it, add your return address, and mail it for you — no printer, stamps, or post office trip needed.
Sources
Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.