Speonk US Post Office

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

2465 Jerusalem Avenue
North Bellmore - 11710
(516) 785-0676

Calverton US Post Office

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

Islip US Post Office

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

Mastic Beach US Post Office

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

Long Beach US Post Office

101 E Park Avenue
Long Beach - 11561
(516) 432-5484

Port Jefferson US Post Office

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

Roosevelt US Post Office

1 Babylon Turnpike
Roosevelt - 11575
(516) 378-6973

Islandia US Post Office

PO Box 7800
Islandia - 11760
(631) 582-7420

Old Bethpage US Post Office

696 Old Bethpage Road
Old Bethpage - 11804
(516) 249-2915

Holbrook US Post Office

445 Furrows Road
Holbrook - 11741
(631) 588-0226