Suffolk County Post Office

Find Suffolk County 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.


Amagansett Post Office 501 Montauk Highway Amagansett NY 11930 631-267-2804


Amityville Post Office 77 Ireland Place Amityville NY 11701 631-264-3532

Aquebogue Post Office 212 Linda Avenue Riverhead NY 11901 631-722-4368

Babylon Post Office 110 Cooper Street Babylon NY 11702 631-669-4474

Bay Shore Post Office 1314 5th Avenue Bay Shore NY 11706 631-969-3504

Bayport Post Office 850 Montauk Highway Bayport NY 11705 631-472-7396

Bellport Post Office 26 Station Road Bellport NY 11713 631-286-8561

Blue Point Post Office 141 Montauk Highway Blue Point NY 11715 631-363-6272

Bohemia Post Office 200 Orville Drive Bohemia NY 11716 631-589-2487

Brentwood Post Office 25 2nd Street Brentwood NY 11717 631-273-0947

Bridgehampton Post Office 2322 Montauk Highway Bridgehampton NY 11932 631-537-9322

Brightwaters Post Office 145 Orinoco Drive Brightwaters NY 11718 631-206-4855

Brookhaven Post Office 2512 Montauk Highway Brookhaven NY 11719 631-286-1591

Calverton Post Office 3690 Middle Country Road Calverton NY 11933 631-727-0067

Center Moriches Post Office 35 Railroad Avenue Center Moriches NY 11934 631-878-0953

Centereach Post Office 245 Centereach Mall Centereach NY 11720 631-588-7069

Centerport Post Office 434 East Main Street Centerport NY 11721 631-261-6918

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

Cold Spring Harbor Post Office 126 Main Street Cold Spring Harbor NY 11724 631-692-5307

Commack Post Office 150 Veterans Memorial Highway Commack NY 11725 631-543-3647

Copiague Post Office 695 Marconi Boulevard Copiague NY 11726 631-842-9084

Coram Post Office 117 Pauls Path Coram NY 11727 631-732-8691

Cutchogue Post Office 240 Griffing Street Cutchogue NY 11935 631-734-6032

Deer Park Post Office 375 Carlls Path Deer Park NY 11729 631-667-6490

East Hampton Post Office 12 Gay Road East Hampton NY 11937 631-324-6320

East Islip Post Office 11 Greenwood Avenue East Islip NY 11730 631-581-7807

East Marion Post Office 9165 Main Road East Marion NY 11939 631-477-1668

East Moriches Post Office 3 Atlantic Avenue East Moriches NY 11940 631-878-0243

East Northport Post Office 297 Larkfield Road East Northport NY 11731 631-368-5632

East Quogue Post Office 6 Bay Avenue East Quogue NY 11942 631-653-5247

East Setauket Post Office 450 Route 25A Setauket-East Setauket NY 11733 631-941-4005

Eastport Post Office 24 Eastport-Manor Road Eastport NY 11941 631-325-1798

Farmingville Post Office 500 Horseblock Road Farmingville NY 11738 631-732-8625

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

Fishers Island Post Office 1 Oriental Ave Fishers Island NY 06390 631-788-7835

Great River Post Office 62 River Road Great River NY 11739 631-581-7680

Greenlawn Post Office 55 Broadway Greenlawn NY 11740 631-261-6437

Greenport Post Office 131 Front Street Greenport NY 11944 631-477-1493

Halesite Post Office 16 New York Avenue Huntington NY 11743 631-423-5880

Hampton Bays Post Office 16 Ponquogue Avenue Hampton Bays NY 11946 631-728-6994

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

Holbrook Post Office 445 Furrows Road Holbrook NY 11741 631-588-0226

Holtsville Post Office 162 Long Island Avenue Holtsville NY 11742 631-475-1761

Huntington Post Office 55 Gerard Street Huntington NY 11743 631-427-3825

Huntington Station Post Office 888 East Jericho Turnpike Huntington Station NY 11746 631-427-0594

Islip Post Office 309 Main Street Islip NY 11751 631-581-7931

Islip Terrace Post Office 136 Carleton Avenue Islip Terrace NY 11752 631-581-7894

Jamesport Post Office 1451 New York State Route 25 Laurel NY 11948 631-722-5946

Kings Park Post Office 125 East Main Street Kings Park NY 11754 631-269-6481

Lake Grove Post Office 1001 Hawkins Avenue Lake Grove NY 11755 631-588-7019

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

Laurel Post Office 2168 Main Road Laurel NY 11948 631-298-1672

Lindenhurst Post Office 65 East Hoffman Avenue Lindenhurst NY 11757 631-226-6914

Manorville Post Office 525 Eastport Manor Road Manorville NY 11949 631-727-0064

Mastic Beach Post Office 110 Mastic Road Mastic Beach NY 11951 631-281-0359

Mastic Post Office 1450 Montauk Highway Mastic NY 11950 631-281-0275

Mattituck Post Office 140 Love Lane Mattituck NY 11952 631-298-1364

Medford Post Office 1905 Route 112 Medford NY 11763 631-475-8273

Melville Post Office 718 Walt Whitman Road Melville NY 11747 631-421-0726

Middle Island Post Office 780 Middle Country Road Middle Island NY 11953 631-205-1089

Miller Place Post Office 47 Echo Avenue Miller Place NY 11764 631-473-8134

Montauk Post Office 73 South Euclid Avenue Montauk NY 11954 631-668-7043

Moriches Post Office 290 Montauk Highway Moriches NY 11955 631-878-1381

Mount Sinai Post Office 457 Route 25A Mount Sinai NY 11766 631-928-0394

Nesconset Post Office 226 Smithtown Boulevard Nesconset NY 11767 631-265-3278

New Suffolk Post Office 375 1st Street New Suffolk NY 11956 631-734-6271

Niagara University Post Office 1 Sophomore Lane Stony Brook NY 11790 716-285-2655

North Babylon Post Office 1196 Deer Park Avenue North Babylon NY 11703 631-667-4693

Northport Post Office 240 Main Street Northport NY 11768 631-261-6941

Oakdale Post Office 927 Montauk Highway Oakdale NY 11769 631-589-2683

Ocean Beach Post Office 315 Cottage Walk Ocean Beach NY 11770 631-583-7368

Orient Post Office 980 Village Lane Orient NY 11957 631-323-9760

Patchogue Post Office 170 East Main Street Patchogue NY 11772 631-475-8623

Peconic Post Office 2575 Peconic Lane Peconic NY 11958 631-765-9348

Penataquit Post Office 10 Bay Shore Avenue Bay Shore NY 11706 631-969-3506

Port Jefferson Post Office 407 East Main Street Port Jefferson NY 11777 631-473-1065

Port Jefferson Station Post Office 544 Jefferson Boulevard Port Jefferson Station NY 11776 631-473-2751

Quogue Post Office 6 Midland Street Quogue NY 11959 631-653-6427

Remsenburg Post Office 137 South Country Road Remsenburg-Speonk NY 11960 631-325-5937

Ridge Post Office 1700 Middle Country Road Ridge NY 11961 631-345-6842

Riverhead Post Office 1210 West Main Street Riverhead NY 11901 631-727-1019

Rocky Point Post Office 346 Route 25A Rocky Point NY 11778 631-744-0635

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

Sag Harbor Post Office 21 Long Island Avenue Sag Harbor NY 11963 631-725-8968

Sagaponack Post Office 542 Sagg Main Street Sagaponack NY 11962 631-537-9346

Saint James Post Office 325 Lake Avenue St. James NY 11780 631-584-4138

Santapogue Post Office 617 West Montauk Highway West Babylon NY 11704 631-422-2276

Sayville Post Office 130 Greene Avenue Sayville NY 11782 631-589-6963

Selden Post Office 109 College Road Selden NY 11784 631-732-8627

Setauket Post Office 101 Main Street Setauket-East Setauket NY 11733 631-941-4042

Shelter Island Heights Post Office 6 Grand Avenue Shelter Island Heights NY 11965 631-749-0486

Shelter Island Post Office 45 North Ferry Road Shelter Island NY 11964 631-749-1857

Shirley Post Office 800 Montauk Highway Shirley NY 11967 631-281-0479

Shoreham Post Office 69 Route 25A Shoreham NY 11786 631-744-3185

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

Sound Beach Post Office 25 New York Avenue Sound Beach NY 11789 631-744-0837

South Jamesport Post Office 70 2nd St South Jamesport NY 11970 631-722-4317

Southampton Post Office 123 North Sea Road Southampton NY 11968 631-204-9822

Southold Post Office 710 Traveler Street Southold NY 11971 631-765-4027

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.