11787 Post Office

Find 11787 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.


Smithtown Post Office 25 Route 111 Smithtown NY 11787 631-360-6709


Hauppauge Post Office 960 Wheeler Road Hauppauge NY 11788 2.0 miles from 11787 631-360-6712

Kings Park Post Office 125 East Main Street Kings Park NY 11754 2.8 miles from 11787 631-269-6481

Hauppauge Industrial Park Post Office 150 Oser Avenue Hauppauge NY 11788 3.2 miles from 11787 631-231-3155

Saint James Post Office 325 Lake Avenue St. James NY 11780 3.4 miles from 11787 631-584-4138

Nesconset Post Office 226 Smithtown Boulevard Nesconset NY 11767 3.5 miles from 11787 631-265-3278

Commack Post Office 150 Veterans Memorial Highway Commack NY 11725 3.6 miles from 11787 631-543-3647

Central Islip Post Office 110 East Suffolk Avenue Central Islip NY 11722 4.2 miles from 11787 631-234-0547

Niagara University Post Office 1 Sophomore Lane Stony Brook NY 11790 5.0 miles from 11787 716-285-2655

Lake Grove Post Office 1001 Hawkins Avenue Lake Grove NY 11755 5.1 miles from 11787 631-588-7019

Stony Brook Post Office 129 Main Street Stony Brook NY 11790 5.6 miles from 11787 631-751-5691

Ronkonkoma Post Office 200 Hawkins Avenue Ronkonkoma NY 11779 6.0 miles from 11787 631-588-0301

East Northport Post Office 297 Larkfield Road East Northport NY 11731 6.0 miles from 11787 631-368-5632

Lake Ronkonkoma Post Office 300 Portion Road Ronkonkoma NY 11779 6.1 miles from 11787 631-588-1292

Brentwood Post Office 25 2nd Street Brentwood NY 11717 6.3 miles from 11787 631-273-0947

Federal Court House Post Office 101 Federal Plaza Central Islip NY 11722 6.5 miles from 11787 631-715-0001

Centereach Post Office 245 Centereach Mall Centereach NY 11720 6.7 miles from 11787 631-588-7069

Islip Terrace Post Office 136 Carleton Avenue Islip Terrace NY 11752 7.5 miles from 11787 631-581-7894

East Setauket Post Office 450 Route 25A Setauket-East Setauket NY 11733 7.7 miles from 11787 631-941-4005

Northport Post Office 240 Main Street Northport NY 11768 7.8 miles from 11787 631-261-6941

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.