Post Offices
Post Offices in & near Mount Sinai, New York. Operating hours, locations, phone/fax number, services information.
Mount Sina Post Office
Post Office in Mount Sinai, New York on Route 25a. Operating hours, phone number, services information, and other locations.
Address: 457 Route 25a, Mount Sinai, NY 11766
Phone: 631-928-0394
Fax: 631-476-3512
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457
Retail Hours
Monday 9:00am - 5:00pmTuesday 9:00am - 5:00pm
Wednesday 9:00am - 5:00pm
Thursday 9:00am - 5:00pm
Friday 9:00am - 5:00pm
Saturday 9:00am - 1:00pm
Sunday Closed
Lobby Hours
Monday 5:00pmTuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 1:00pm
Sunday Closed
Last Collection Times
Monday 9:00am - 2:00pmTuesday 9:00am - 2:00pm
Wednesday 9:00am - 2:00pm
Thursday 9:00am - 2:00pm
Friday 9:00am - 2:00pm
Saturday Closed
Sunday Closed