11779 Post Office

Find 11779 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.


Lake Ronkonkoma Post Office 300 Portion Road Ronkonkoma NY 11779 631-588-1292


Ronkonkoma Post Office 200 Hawkins Avenue Ronkonkoma NY 11779 631-588-0301

Nesconset Post Office 226 Smithtown Boulevard Nesconset NY 11767 2.3 miles from 11779 631-265-3278

Holbrook Post Office 445 Furrows Road Holbrook NY 11741 2.4 miles from 11779 631-588-0226

Lake Grove Post Office 1001 Hawkins Avenue Lake Grove NY 11755 2.7 miles from 11779 631-588-7019

Bohemia Post Office 200 Orville Drive Bohemia NY 11716 3.0 miles from 11779 631-589-2487

Centereach Post Office 245 Centereach Mall Centereach NY 11720 3.7 miles from 11779 631-588-7069

Holtsville Post Office 162 Long Island Avenue Holtsville NY 11742 3.8 miles from 11779 631-475-1761

Farmingville Post Office 500 Horseblock Road Farmingville NY 11738 4.1 miles from 11779 631-732-8625

Central Islip Post Office 110 East Suffolk Avenue Central Islip NY 11722 4.4 miles from 11779 631-234-0547

Selden Post Office 109 College Road Selden NY 11784 4.6 miles from 11779 631-732-8627

Smithtown Post Office 25 Route 111 Smithtown NY 11787 4.7 miles from 11779 631-360-6709

Hauppauge Post Office 960 Wheeler Road Hauppauge NY 11788 4.8 miles from 11779 631-360-6712

Saint James Post Office 325 Lake Avenue St. James NY 11780 5.0 miles from 11779 631-584-4138

Oakdale Post Office 927 Montauk Highway Oakdale NY 11769 5.1 miles from 11779 631-589-2683

Federal Court House Post Office 101 Federal Plaza Central Islip NY 11722 5.4 miles from 11779 631-715-0001

Sayville Post Office 130 Greene Avenue Sayville NY 11782 5.6 miles from 11779 631-589-6963

Bayport Post Office 850 Montauk Highway Bayport NY 11705 5.6 miles from 11779 631-472-7396

Blue Point Post Office 141 Montauk Highway Blue Point NY 11715 5.7 miles from 11779 631-363-6272

Niagara University Post Office 1 Sophomore Lane Stony Brook NY 11790 5.8 miles from 11779 716-285-2655

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.