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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Central Islip US Post Office

110 E Suffolk Avenue
Central Islip - 11722
(631) 234-0547

Hauppauge US Post Office

150 Oser Avenue
Hauppauge - 11788
(631) 231-3155

Riverhead US Post Office

1210 W Main St
Riverhead - 11901
(631) 727-1019

Great Neck US Post Office

1 Welwyn Road
Great Neck - 11021
(516) 482-5013

East Quogue US Post Office

6 Bay Avenue
East Quogue - 11942
(631) 653-5247

Point Lookout US Post Office

110 Lido Blvd
Point Lookout - 11569
(516) 431-7590

Mill Neck US Post Office

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

Ronkonkoma US Post Office

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

Glenwood Landing US Post Office

123 Glenwood Road
Glenwood Landing - 11547
(516) 676-8452

Mastic Beach US Post Office

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