Nantucket Carrier Annex Post Office

155 Old South Rd, Nantucket, MA 02554

Contact Numbers

Phone: 508-325-5987
Fax: 508-325-5887
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Lobby Hours

Monday 11:00am - 5:00pm
Tuesday 11:00am - 5:00pm
Wednesday 11:00am - 5:00pm
Thursday 11:00am - 5:00pm
Friday 11:00am - 5:00pm
Saturday 10:00am - 12:30pm
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Business Line
  • Pickup Accountable Mail
  • Pickup Hold Mail

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

Nantucket Station 1
144 Pleasant St
1.3 miles away

5 Federal St
1.9 miles away

6 Main St
3.8 miles away

Harwich Port
10 Post Office Sq
16.4 miles away


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My tracking number shows that my package was deliver to an individual, since June 25/ 2021 we are in July 5th I still don't know, who has my package. The carrier who supposedly deliver the package gives my documents and my money order to someone without a name and signature? I went to two postal office to report the issue, no body really help to figure out what really happens with my PACKAGE. The worst part my tracking number stop working when I am figuring out myself to whom my package supposedly deliver. TERRIBLE SERVICE , TERRIBLE.

* is not a part of, or affiliated with, the official United States Postal Service (USPS).