Mastic Post Office

1450 Montauk Hwy, Mastic, NY 11950

Contact Numbers

Phone: 631-281-0275
Fax: 631-281-1082
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 6:30am - 5:00pm
Tuesday 6:30am - 5:00pm
Wednesday 6:30am - 5:00pm
Thursday 6:30am - 5:00pm
Friday 6:30am - 5:00pm
Saturday 6:30am - 3:00pm
Sunday Closed

Last Collection Times

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

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

*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:

290 Montauk Hwy
0.8 mile away

800 Montauk Hwy Ste 1
0.9 mile away

Mastic Beach
110 Mastic Rd
1.5 miles away

Center Moriches
35 Railroad Ave
2.3 miles away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


My package will be deliver to wrong address tomorrow. Correct zip code is 11950 Mastic,my Neptune Ave.. Is going to 11951,Mastic Beach. Please correct the mistake before is to late….I’m waiting for this package. Thank You, Jolanta White


No mail delivery on Coventry ..the mail lady saw vehicles doing the sewer lines and instead of delivery where she could . She immediately parked her truck on thr middle section of the block and didn’t deliver any mail. The last free years it has been a nightmare from summoms for thr mails box not being close to the street. If you don’t want to deliver mail find a new job.


My mail delivery lady is a nightmare! I live on Pawnee, almost all my neighbors have had major issue with her. She is a liability to the post office. She has destroyed hundreds of dollars in property over the past year. She is a careless and reckless driver. She has ran over my driveway bricking 4 times (I have video and pictures to prove it) and then leaves all the bricks scattered across my apron and left in the street! she's destroyed my neighbors fence (caught her bumper of her truck on it and broke the entire fence, again on video!), she ran over my other neighbors garbage can, flattened it, dragged it for a 20 feet under the truck and then just left, yep, all on video!), she had the nerve to have one of my neighbors down the street sent a notice to move their mail box closer to the street!!! really!? after 29 years in the house NOW... the mailbox needs to be moved? that's because she CAN'T DRIVE! AND SHE'S LAZY!, if there is a car 3 feet from your mail box she won't deliver mail, 3 feet!? this past Saturday was the last straw, she busted up all my bricks again after running over my lawn (my bricks that surround a small flower bed around the mailbox are set back under the mailbox by 15 inches) dragged my bricks and left them all over the street. I chased her down in my car showed her pictures of what she did and she said "I don't care"!, really!?.. ok so now I'm making it my mission to go door to door to everyone on her route, asking them what damages she has done to their property, I'm going to get signatures, pictures and security videos, and submit all of them for retribution payment for all the damage she has done to mine and every one else's properties. I have paid over $300 fixing those bricks, my neighbor have replaced endless garbage cans, one spent $600 fixing the fence she crashed through. The post office needs to remove her from our street via changing it with someone else or terminating her immediately. She is a threat, risk and liability when she is driving. It is in the best interest of the Post Master General to contact me immediately as I am ready to take this story with all its evidence to News12. REMOVE HER!


Our mail delivery driver leaves packages outside my fence by mailbox instead of bringing packages up to door. If he’s afraid to come up to door to deliver package then leave a notice in mailbox. I thought this postmaster corrected her carriers judgement. If my packages are left by street then I never received them.

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