Post Offices

Post Offices in & near Kaskaskia, Illinois. Operating hours, locations, phone/fax number, services information.

Saint Mary Post Office

Post Office in Saint Mary, Missouri on Bartels Industrial Dr. Operating hours, phone number, services information, and other locations.

Address: 17410 Bartels Industrial Dr, Saint Mary, MO 63673
Phone: 573-543-2144
Toll-Free: 1-800-Ask-USPS® (275-8777)
TTY: 877-889-2457

Retail Hours

Monday 10:00am - 2:00pm
Tuesday 10:00am - 2:00pm
Wednesday 10:00am - 2:00pm
Thursday 10:00am - 2:00pm
Friday 10:00am - 2:00pm
Saturday 10:15am - 12:15pm
Sunday Closed

Lobby Hours

Monday 11:45am
Tuesday 11:45am
Wednesday 11:45am
Thursday 11:45am
Friday 11:45am
Saturday 11:45am
Sunday Closed

Last Collection Times

Monday 10:00am - 2:00pm
Tuesday 10:00am - 2:00pm
Wednesday 10:00am - 2:00pm
Thursday 10:00am - 2:00pm
Friday 10:00am - 2:00pm
Saturday Closed
Sunday Closed