11788 Post Office

Find 11788 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.


Hauppauge Industrial Park Post Office 150 Oser Avenue Hauppauge NY 11788 631-231-3155


Hauppauge Post Office 960 Wheeler Road Hauppauge NY 11788 631-360-6712

Central Islip Post Office 110 East Suffolk Avenue Central Islip NY 11722 2.0 miles from 11788 631-234-0547

Smithtown Post Office 25 Route 111 Smithtown NY 11787 2.9 miles from 11788 631-360-6709

Nesconset Post Office 226 Smithtown Boulevard Nesconset NY 11767 3.5 miles from 11788 631-265-3278

Commack Post Office 150 Veterans Memorial Highway Commack NY 11725 3.7 miles from 11788 631-543-3647

Brentwood Post Office 25 2nd Street Brentwood NY 11717 4.0 miles from 11788 631-273-0947

Federal Court House Post Office 101 Federal Plaza Central Islip NY 11722 4.2 miles from 11788 631-715-0001

Kings Park Post Office 125 East Main Street Kings Park NY 11754 4.9 miles from 11788 631-269-6481

Saint James Post Office 325 Lake Avenue St. James NY 11780 5.1 miles from 11788 631-584-4138

Islip Terrace Post Office 136 Carleton Avenue Islip Terrace NY 11752 5.2 miles from 11788 631-581-7894

Ronkonkoma Post Office 200 Hawkins Avenue Ronkonkoma NY 11779 5.5 miles from 11788 631-588-0301

Lake Grove Post Office 1001 Hawkins Avenue Lake Grove NY 11755 5.7 miles from 11788 631-588-7019

Lake Ronkonkoma Post Office 300 Portion Road Ronkonkoma NY 11779 5.9 miles from 11788 631-588-1292

East Islip Post Office 11 Greenwood Avenue East Islip NY 11730 6.1 miles from 11788 631-581-7807

Islip Post Office 309 Main Street Islip NY 11751 6.2 miles from 11788 631-581-7931

Bay Shore Post Office 1314 5th Avenue Bay Shore NY 11706 6.3 miles from 11788 631-969-3504

Bohemia Post Office 200 Orville Drive Bohemia NY 11716 6.7 miles from 11788 631-589-2487

Niagara University Post Office 1 Sophomore Lane Stony Brook NY 11790 6.8 miles from 11788 716-285-2655

Penataquit Post Office 10 Bay Shore Avenue Bay Shore NY 11706 6.8 miles from 11788 631-969-3506

About Post Offices

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.