Peconic US Post Office

2575 Peconic Ln
Peconic, NY 11958
Phone: (631) 765-9348
Fax: (631) 475-0611
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Brentwood US Post Office

25 2nd Avenue
Brentwood - 11717
(631) 273-0947

Commack US Post Office

150 Veterans Memorial Highway
Commack - 11725
(631) 543-3647

Bayport US Post Office

850 Montauk Highway
Bayport - 11705
(631) 472-7396

Port Jefferson Station US Post Office

544 Jefferson Placeaza
Port Jefferson Station - 11776
(631) 473-2751

Sagaponack US Post Office

542 Sagg Main St
Sagaponack - 11962
(631) 537-9346

Ronkonkoma US Post Office

200 Hawkins Avenue
Ronkonkoma - 11779
(631) 588-0301

Mastic Beach US Post Office

110 Mastic Road
Mastic Beach - 11951
(631) 281-0359

Merrick US Post Office

2040 Merrick Road
Merrick - 11566
(516) 378-7087

Moriches US Post Office

290 Montauk Highway
Moriches - 11955
(631) 878-1381

Huntington US Post Office

16 New York Avenue
Huntington - 11743
(631) 423-5880