Speonk US Post Office

323 Montauk Highway
Speonk, NY 11972
Phone: (631) 325-1741
Fax: (631) 360-0532
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West Islip US Post Office

480 Union Blvd
West Islip - 11795
(631) 669-5157

Westbury US Post Office

360 Maple Avenue
Westbury - 11590
(516) 333-3598

Sea Cliff US Post Office

200 Sea Cliff Avenue
Sea Cliff - 11579
(516) 671-8258

Mastic Beach US Post Office

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

East Meadow US Post Office

446 E Meadow Avenue
East Meadow - 11554
(516) 794-4509

Port Jefferson US Post Office

407 E Main St # 17
Port Jefferson - 11777
(631) 473-1065

Farmingdale US Post Office

380 Main St
Farmingdale - 11735
(516) 249-1552

Rockville US Post Office

250 Merrick Road
Rockville Centre - 11570
(516) 766-5749

Seaford US Post Office

3575 Merrick Road
Seaford - 11783
(516) 785-3851

US Post Office Processing Center

160 Duryea Road
Melville - 11747
(631) 755-2575