Southampton Post Office

123 N Sea Rd, Southampton, NY 11968

Contact Numbers

Phone: 631-204-9822
Fax: 631-287-1828
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 5:00am - 5:30pm
Tuesday 5:00am - 5:30pm
Wednesday 5:00am - 5:30pm
Thursday 5:00am - 5:30pm
Friday 5:00am - 5:30pm
Saturday 5:00am - 3:30pm
Sunday Closed

Last Collection Times

Monday 5:30pm
Tuesday 5:30pm
Wednesday 5:30pm
Thursday 5:30pm
Friday 5:30pm
Saturday 3:00pm
Sunday Closed

Passport Appointment Hours*

Monday 10:00am - 3:00pm
Tuesday 10:00am - 3:00pm
Wednesday 10:00am - 3:00pm
Thursday 10:00am - 3:00pm
Friday 10:00am - 3:00pm
Saturday 10:00am - 1:00pm
Sunday Closed

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

*An appointment is required to apply for or renew US Passports. Please Call or schedule online.

Bulk Mail Acceptance Hours

Monday 10:00am - 3:00pm
Tuesday 10:00am - 3:00pm
Wednesday 10:00am - 3:00pm
Thursday 10:00am - 3:00pm
Friday 10:00am - 3:00pm
Saturday Closed
Sunday Closed

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking
  • Passport Appointment Hours

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:

Water Mill
670 Montauk Hwy
1.8 miles away

2322 Montauk Hwy
4.0 miles away

542 Sagg Main St
4.9 miles away

New Suffolk
375 1st St
5.0 miles away


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The other day I went over to my post box to collect my mail (box down the street from my home). I found a package from my sister tossed on the side of the road under the box. I know this is not standard procedure as I googled protocol....packages are to be delivered to front doors. Now any passing car could have stolen my package. I am very angry about this and tried calling the postmaster to complain, but no one answered the phone (2x today). This is outrageous!!!!!!!!


Twice in during the past year I have spoken by phone with Lisa, a supervisor, at Southampton. She is intelligent, fast, efficient and very pleasant to speak with.


The post office in Southampton New York at 123 North Sea Rd. is the best post office I’ve ever been to. The Post office near my house in New York City they’ rushed, it’s busy and it’s like pulling teeth to get them to do anything. At this post office if you forget your key they will check your box for you. At one point I hadn’t realized I was receiving a package and didn’t check my box for two months. They actually called me from the post office to warn me that they would have to send the package back if I didn’t pick it up, then they agreed and told it for another week until I could get there . It was actually a really important package It would’ve gone back to China. I’ve never experienced service like that before in any business let alone US Postal Service... been off them and I’m really grateful. It’s now the only way I want to receive packages because I can be totally secure that I’ll get them. These guys (and gals, etc.) really care about their job.

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