11721 Post Office

Find 11721 post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Centerport Post Office 434 East Main Street Centerport NY 11721 631-261-6918


Northport Post Office 240 Main Street Northport NY 11768 1.3 miles from 11721 631-261-6941

Greenlawn Post Office 55 Broadway Greenlawn NY 11740 2.3 miles from 11721 631-261-6437

Halesite Post Office 16 New York Avenue Huntington NY 11743 2.5 miles from 11721 631-423-5880

East Northport Post Office 297 Larkfield Road East Northport NY 11731 3.2 miles from 11721 631-368-5632

Huntington Post Office 55 Gerard Street Huntington NY 11743 3.7 miles from 11721 631-427-3825

Huntington Station Post Office 888 East Jericho Turnpike Huntington Station NY 11746 4.7 miles from 11721 631-427-0594

Cold Spring Harbor Post Office 126 Main Street Cold Spring Harbor NY 11724 5.0 miles from 11721 631-692-5307

Commack Post Office 150 Veterans Memorial Highway Commack NY 11725 6.6 miles from 11721 631-543-3647

Kings Park Post Office 125 East Main Street Kings Park NY 11754 6.7 miles from 11721 631-269-6481

Melville Post Office 718 Walt Whitman Road Melville NY 11747 7.1 miles from 11721 631-421-0726

Woodbury Post Office 217 Woodbury Road Woodbury NY 11797 7.2 miles from 11721 516-692-5470

Hauppauge Industrial Park Post Office 150 Oser Avenue Hauppauge NY 11788 8.6 miles from 11721 631-231-3155

Oyster Bay Post Office 1 Shore Avenue Oyster Bay NY 11771 8.7 miles from 11721 516-922-8249

Syosset Post Office 40 Queens Street Syosset NY 11791 8.8 miles from 11721 516-921-0746

Plainview Post Office 1662 Old Country Road Plainview NY 11803 9.3 miles from 11721 516-845-7162

East Norwich Post Office 1001 Oyster Bay Road East Norwich NY 11732 9.4 miles from 11721 516-922-8283

Bayville Post Office 251 Bayville Avenue Bayville NY 11709 9.4 miles from 11721 516-628-9235

Wheatley Heights Post Office 6 Colonial Springs Road Wheatley Heights NY 11798 10.1 miles from 11721 631-643-3913

Deer Park Post Office 375 Carlls Path Deer Park NY 11729 10.1 miles from 11721 631-667-6490

What Change of Address options are available?

Customers can request a temporary or permanent Change of Address either online or in person at the Post Office using PS Form 3575. The online application for Change of Address has a $1.00 identity validation fee.

Is it possible to insure mail and items sent via the USPS?

Yes. Standard mail can be insured for up to $5,000 for an additional fee. Registered mail items can be insured for up to $50,000.

What is the USPS Office of Inspector General?

The Office of Inspector General (OIG) is a division within the USPS responsible for ensuring the integrity and accountability of the postal service. It conducts investigations to safeguard the postal system and performs audits and reviews.