Port Jefferson US Post Office

407 E Main St # 17
Port Jefferson, NY 11777
Phone: (631) 473-1065
Fax: (516) 845-7406
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Stony Brook US Post Office

129 Main St
Stony Brook - 11790
(631) 751-5691

Mill Neck US Post Office

32 Frost Mill Road
Mill Neck - 11765
(516) 922-8247

Mt. Sinai US Post Office

457 Route 25a
Mt Sinai - 11766
(631) 928-0394

Calverton US Post Office

3690 Middle Country Road
Calverton - 11933
(631) 727-0067

Centerport US Post Office

434 E Main St
Centerport - 11721
(631) 261-6918

Hempstead US Post Office

200 Fulton Avenue
Hempstead - 11550
(516) 560-1120

Islip US Post Office

309 Main St # 3
Islip - 11751
(631) 581-7931

Manorville US Post Office

525 Eastport Manor Road
Manorville - 11949
(631) 727-0064

Glen Cove US Post Office

2 Glen Cove Avenue
Glen Cove - 11542
(516) 671-7847

Locust US Post Office

115 Forest Avenue
Locust Valley - 11560
(516) 671-1559