Holtsville Post Office

162 Long Island Ave, Holtsville, NY 11742

Contact Numbers

Phone: 631-475-1761
Fax: 631-475-6840
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 9:00am - 5:00pm
Tuesday 9:00am - 5:00pm
Wednesday 9:00am - 5:00pm
Thursday 9:00am - 5:00pm
Friday 9:00am - 5:00pm
Saturday 9:00am - 1:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 1:00pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday 10:00am - 2:00pm
Tuesday 10:00am - 2:00pm
Wednesday 10:00am - 2:00pm
Thursday 10:00am - 2:00pm
Friday 10:00am - 2:00pm
Saturday Closed
Sunday Closed

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

  • 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
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking

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:

500 Horseblock Rd
0.8 mile away

445 Furrows Rd
1.1 miles away

1905 Route 112
1.6 miles away

109 College Plz
2.0 miles away


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Mail delivery is spotty at best. Tonight, the postal worker went down ones side of the street an not the other. many of us depend on mail delivery for business reasons. it must be nice for the Holtsville letter carriers to get paid whether they do their job or not. This has become a recurring problem lately


Why is this post office marking my mail as delivered, when I'm not receiving it? 2 times now the company I'm in contact with has mailed me important files, and both times they're being marked as "delivered" to my exact address. For some reason, I'm getting other mail, but not the only things I REALLY need, and I needed them weeks ago.


So the first time I order food for my dragon online, you folks smashed a square box into a triangle, killing a 3rd of the insects, you are lucky as hell the package wasn't compromised or you would have had a truck full of crickets and roaches, which you sort of deserve for smashing the package. Now you decided that there was "no secure spot". That's funny, because this is the only carrier who can't find my bushes right next to my door, or just drop it LIKE EVERY OTHER GODDAMNED CARRIER. Thanks to you guys this business now loses my business because the only option for shipping, can't seem to handle shipping to my house without screwing something up This is just another example of a government agency with terrible service, no wonder you lose billions every quarter

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