Seaford Post Office

3575 Merrick Rd, Seaford, NY 11783

Contact Numbers

Phone: 516-785-3851
Fax: 516-785-2423
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 5:45am - 5:00pm
Tuesday 5:45am - 5:00pm
Wednesday 5:45am - 5:00pm
Thursday 5:45am - 5:00pm
Friday 5:45am - 5:00pm
Saturday 5:45am - 5:00pm
Sunday Closed

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 4:00pm
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:

3300 Park Ave
0.6 mile away

80 Killians Rd
1.0 miles away

North Wantagh
1250 Wantagh Ave
1.1 miles away

2611 Merrick Rd
1.2 miles away


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I send my Netflix back and Seford post office is not even scanning my movies so Netflix thinks I’m keeping the movies


Since our long time carrier retired in September, the service has not been great. Today I received mail for the neighbor around the corner. Different last name and completely different street. None of the mail I received was for our household. So I wondered, who has my mail? Could you hire at least ONE person who can read and knows what they are doing?


What gives with the slow mail? Letter from NJ mailed 3/27 no where to be found a week four days later? Letter from miniola took a week? is this normal?


Every time we get a new mail carrier we get weeks of not receiving our mail, but we get other people's mail. Can these carriers not read ? Our name is clearly on our mailbox. Either better training is needed or they are just plain lazy. Just had to call the local post office again. Something needs to be done about this.


Its 4 weeks not getting mail in Florida, filled application out in 2 months ago. Just seen on my Ring, a woman post worker delivering my mail in Seaford home. Also, why doesn't anyone answer the phone????????
• Replied to Linda Kozian


on Saturday, 5/7 I received a sorry we missed you notice for a large envelope Priority Mail Express item. tracking #EL023098802US. told me that the item would be available on 5/9 at 11am. I went to the Seaford PO on Monday, 5/9 at about 1:30 and the item was not there. I was told that it was being redelivered to my home. I got home about hour later and lo and behold I received another sorry we missed you notice. I went back to the PO and was informed they could not reach the letter carrier and would deliver to me. My son & daughter in law paid for Priority Mail Express service and the service was not performed. I need for you to refund the cost of this service also you need to retrain your employees on how to handle this transaction. If it doesn't say signature required, it should be left. I expect to hear from you concerning this situation. I am not happy and neither is the party that paid for this service. I expect a reply ASAP and a refund.

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