Find Islip New York 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.
Islip Post Office 309 Main Street Islip NY 11751 631-581-7931
Islip Terrace Post Office 136 Carleton Avenue Islip Terrace NY 11752 1.3 miles from Islip 631-581-7894
East Islip Post Office 11 Greenwood Avenue East Islip NY 11730 1.6 miles from Islip 631-581-7807
Penataquit Post Office 10 Bay Shore Avenue Bay Shore NY 11706 1.8 miles from Islip 631-969-3506
Federal Court House Post Office 101 Federal Plaza Central Islip NY 11722 2.1 miles from Islip 631-715-0001
Bay Shore Post Office 1314 5th Avenue Bay Shore NY 11706 2.4 miles from Islip 631-969-3504
Brightwaters Post Office 145 Orinoco Drive Brightwaters NY 11718 2.7 miles from Islip 631-206-4855
Brentwood Post Office 25 2nd Street Brentwood NY 11717 2.9 miles from Islip 631-273-0947
Great River Post Office 62 River Road Great River NY 11739 3.4 miles from Islip 631-581-7680
Central Islip Post Office 110 East Suffolk Avenue Central Islip NY 11722 4.2 miles from Islip 631-234-0547
West Islip Post Office 480 Union Boulevard West Islip NY 11795 4.6 miles from Islip 631-669-5157
Oakdale Post Office 927 Montauk Highway Oakdale NY 11769 5.1 miles from Islip 631-589-2683
North Babylon Post Office 1196 Deer Park Avenue North Babylon NY 11703 5.6 miles from Islip 631-667-4693
Deer Park Post Office 375 Carlls Path Deer Park NY 11729 5.7 miles from Islip 631-667-6490
Babylon Post Office 110 Cooper Street Babylon NY 11702 5.9 miles from Islip 631-669-4474
Hauppauge Industrial Park Post Office 150 Oser Avenue Hauppauge NY 11788 6.0 miles from Islip 631-231-3155
West Sayville Post Office 12 Washington Avenue West Sayville NY 11796 6.0 miles from Islip 631-589-6958
Hauppauge Post Office 960 Wheeler Road Hauppauge NY 11788 6.2 miles from Islip 631-360-6712
Bohemia Post Office 200 Orville Drive Bohemia NY 11716 6.5 miles from Islip 631-589-2487
Ocean Beach Post Office 315 Cottage Walk Ocean Beach NY 11770 6.7 miles from Islip 631-583-7368
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.
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.
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.