Central Islip Post Office

Find Central 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.


Central Islip Post Office 110 East Suffolk Avenue Central Islip NY 11722 631-234-0547


Federal Court House Post Office 101 Federal Plaza Central Islip NY 11722 631-715-0001

Islip Terrace Post Office 136 Carleton Avenue Islip Terrace NY 11752 2.7 miles from Central Islip 631-581-7894

Hauppauge Post Office 960 Wheeler Road Hauppauge NY 11788 2.9 miles from Central Islip 631-360-6712

Brentwood Post Office 25 2nd Street Brentwood NY 11717 3.2 miles from Central Islip 631-273-0947

East Islip Post Office 11 Greenwood Avenue East Islip NY 11730 3.6 miles from Central Islip 631-581-7807

Hauppauge Industrial Park Post Office 150 Oser Avenue Hauppauge NY 11788 3.8 miles from Central Islip 631-231-3155

Islip Post Office 309 Main Street Islip NY 11751 4.0 miles from Central Islip 631-581-7931

Nesconset Post Office 226 Smithtown Boulevard Nesconset NY 11767 4.2 miles from Central Islip 631-265-3278

Smithtown Post Office 25 Route 111 Smithtown NY 11787 4.9 miles from Central Islip 631-360-6709

Bohemia Post Office 200 Orville Drive Bohemia NY 11716 4.9 miles from Central Islip 631-589-2487

Bay Shore Post Office 1314 5th Avenue Bay Shore NY 11706 4.9 miles from Central Islip 631-969-3504

Great River Post Office 62 River Road Great River NY 11739 5.0 miles from Central Islip 631-581-7680

Penataquit Post Office 10 Bay Shore Avenue Bay Shore NY 11706 5.0 miles from Central Islip 631-969-3506

Ronkonkoma Post Office 200 Hawkins Avenue Ronkonkoma NY 11779 5.0 miles from Central Islip 631-588-0301

Oakdale Post Office 927 Montauk Highway Oakdale NY 11769 5.0 miles from Central Islip 631-589-2683

Brightwaters Post Office 145 Orinoco Drive Brightwaters NY 11718 5.7 miles from Central Islip 631-206-4855

Commack Post Office 150 Veterans Memorial Highway Commack NY 11725 5.7 miles from Central Islip 631-543-3647

Lake Ronkonkoma Post Office 300 Portion Road Ronkonkoma NY 11779 5.8 miles from Central Islip 631-588-1292

West Sayville Post Office 12 Washington Avenue West Sayville NY 11796 6.2 miles from Central Islip 631-589-6958

What is a Post Office?

A post office is a local branch of the United States Postal Service, where mail is received and dispatched to individuals and businesses in a given community. A post office usually has postal clerks who receive and process mail, and it's also the place from which mail carriers pick up mail they deliver on their local routes. The office handles USPS business, including mail and package sorting, delivery and forwarding, sales of stamps and other postal supplies, change-of-address requests, and other administrative functions.

In some small communities, the local post office may be located within a commercial business. In communities both large and small, a post office may serve as a local passport office at which passport applications are received and undergo initial processing.