Congress Plaza Hotel mailing address
To mail Congress Plaza Hotel, send your letter to Congress Plaza Hotel, 520 South Michigan Avenue, Chicago, IL 60605, USA, addressed to Guest Relations. This is the historic landmark hotel on Michigan Avenue overlooking Grant Park in Chicago, Illinois. To reach someone staying there instead, put the guest's name on the first line and "c/o Congress Plaza Hotel" above the same address — and make sure it arrives during their stay.
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Mailing address
Verified September 2026Congress Plaza Hotel — mailing address
Guest Relations Congress Plaza Hotel 520 South Michigan Avenue Chicago IL 60605 United States
General correspondence, guest relations, billing questions, and lost-and-found enquiries. To reach a guest who is currently checked in, replace "Guest Relations" with the guest's full name, keep "Congress Plaza Hotel" on the next line, and add their arrival date so the front desk can hold the mail.
No printer, envelope, or stamp — we print and mail it the next business day.
Sources
Addresses verified September 2026 against official sources. Always confirm on the official site before time-sensitive filings.
Key facts
- Letters to the hotel go to "Guest Relations, Congress Plaza Hotel" at 520 South Michigan Avenue, Chicago.
- To reach a current guest, use their name, "c/o Congress Plaza Hotel", the same address, and their arrival date — the front desk holds it for check-in.
- A hotel can't forward mail to a guest after they check out, so time it to land during the stay.
- Great for lost-and-found claims and billing questions: a mailed letter gives you a dated paper trail.
- PostPal prints your letter and mails it to the US for you — no printer, envelope, stamps, or post office trip.
How to send your letter
- 1
Decide who the letter is for
Writing to the hotel itself — a complaint, a compliment, a billing question, or a lost-and-found claim — goes to Guest Relations. Writing to someone staying there goes to that guest, care of the hotel, and only works while they're checked in.
- 2
Address it correctly
For the hotel: first line Guest Relations, then Congress Plaza Hotel, then 520 South Michigan Avenue, then Chicago IL 60605. For a guest: put the guest's full name on the first line, "c/o Congress Plaza Hotel" on the next, the same street and city lines, and write their arrival date on the envelope so the front desk knows to hold it.
- 3
Keep it to paper, and time it
Send letters and printed documents — not cash or valuables. Mail for a guest should arrive during their stay, so post it a few days ahead; if you're not sure of the dates, call the hotel first. A hotel can't forward mail to a guest who has already checked out.
- 4
Send it without a printer
Write or upload your letter to PostPal with Congress Plaza Hotel's address prefilled. We print it, add your return address, and mail it to the US for you — no printer, envelope, stamps, or trip to the post office.
Common questions
What is the mailing address for Congress Plaza Hotel?
Congress Plaza Hotel, 520 South Michigan Avenue, Chicago, IL 60605, USA. Address letters to the hotel to "Guest Relations, Congress Plaza Hotel" at that address.
How do I send mail to a guest staying at Congress Plaza Hotel?
Put the guest's full name on the first line, then "c/o Congress Plaza Hotel", then 520 South Michigan Avenue, Chicago, IL 60605. Write the guest's arrival date on the envelope and post it so it arrives during their stay — the hotel holds mail at the front desk for current guests but can't forward it after checkout.
Can I mail Congress Plaza Hotel about a lost item?
Yes. A letter to Guest Relations at the address above is a good paper trail for a lost-and-found claim — include the dates of your stay, your room number if you have it, a description of the item, and your return address so they can reach you.
Can I send Congress Plaza Hotel a package or a gift?
PostPal sends letters and printed documents, not parcels. Many hotels will accept a package for a registered guest, but policies vary and there may be a handling fee — call the hotel before shipping anything, and never send cash.
How do I mail Congress Plaza Hotel from Canada without a printer?
Write or upload your letter to PostPal with the address prefilled. We print it, add your return address, and send it to the US as an international letter — no printer, stamps, or post office trip needed.